./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 067fe51884f92ae3774f211cf9d4291369df85b7690d3eee54cd23a70c2ea301 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 18:11:46,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 18:11:46,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 18:11:46,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 18:11:46,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 18:11:46,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 18:11:46,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 18:11:46,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 18:11:46,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 18:11:46,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 18:11:46,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 18:11:46,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 18:11:46,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 18:11:46,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 18:11:46,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 18:11:46,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 18:11:46,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 18:11:46,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 18:11:46,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 18:11:46,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 18:11:46,970 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 18:11:46,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 18:11:46,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 18:11:46,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 18:11:46,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 18:11:46,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 18:11:46,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 18:11:46,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 18:11:46,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 18:11:46,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 18:11:46,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 18:11:46,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 18:11:46,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 18:11:46,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 18:11:46,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 18:11:46,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 18:11:46,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 18:11:46,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 18:11:46,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 18:11:46,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 18:11:46,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 18:11:47,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 18:11:47,002 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 18:11:47,052 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 18:11:47,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 18:11:47,053 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 18:11:47,053 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 18:11:47,054 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 18:11:47,054 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 18:11:47,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 18:11:47,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 18:11:47,055 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 18:11:47,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 18:11:47,056 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 18:11:47,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 18:11:47,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 18:11:47,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 18:11:47,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 18:11:47,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 18:11:47,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 18:11:47,056 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 18:11:47,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 18:11:47,057 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 18:11:47,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 18:11:47,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 18:11:47,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 18:11:47,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 18:11:47,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:11:47,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 18:11:47,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 18:11:47,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 18:11:47,058 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 18:11:47,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 18:11:47,059 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 18:11:47,059 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 18:11:47,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 18:11:47,059 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 067fe51884f92ae3774f211cf9d4291369df85b7690d3eee54cd23a70c2ea301 [2022-07-13 18:11:47,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 18:11:47,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 18:11:47,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 18:11:47,479 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 18:11:47,479 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 18:11:47,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c [2022-07-13 18:11:47,561 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef22b0758/4227343b922c4e71bcc991f7f54bc3a6/FLAG14f4e7b4c [2022-07-13 18:11:48,206 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 18:11:48,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c [2022-07-13 18:11:48,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef22b0758/4227343b922c4e71bcc991f7f54bc3a6/FLAG14f4e7b4c [2022-07-13 18:11:48,572 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef22b0758/4227343b922c4e71bcc991f7f54bc3a6 [2022-07-13 18:11:48,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 18:11:48,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 18:11:48,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 18:11:48,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 18:11:48,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 18:11:48,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:11:48" (1/1) ... [2022-07-13 18:11:48,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4601e689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:11:48, skipping insertion in model container [2022-07-13 18:11:48,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:11:48" (1/1) ... [2022-07-13 18:11:48,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 18:11:48,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 18:11:48,969 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c[646,659] [2022-07-13 18:11:49,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:11:49,165 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 18:11:49,189 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c[646,659] [2022-07-13 18:11:49,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:11:49,271 INFO L208 MainTranslator]: Completed translation [2022-07-13 18:11:49,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:11:49 WrapperNode [2022-07-13 18:11:49,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 18:11:49,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 18:11:49,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 18:11:49,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 18:11:49,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:11:49" (1/1) ... [2022-07-13 18:11:49,298 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:11:49" (1/1) ... [2022-07-13 18:11:49,333 INFO L137 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 866 [2022-07-13 18:11:49,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 18:11:49,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 18:11:49,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 18:11:49,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 18:11:49,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:11:49" (1/1) ... [2022-07-13 18:11:49,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:11:49" (1/1) ... [2022-07-13 18:11:49,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:11:49" (1/1) ... [2022-07-13 18:11:49,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:11:49" (1/1) ... [2022-07-13 18:11:49,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:11:49" (1/1) ... [2022-07-13 18:11:49,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:11:49" (1/1) ... [2022-07-13 18:11:49,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:11:49" (1/1) ... [2022-07-13 18:11:49,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 18:11:49,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 18:11:49,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 18:11:49,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 18:11:49,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:11:49" (1/1) ... [2022-07-13 18:11:49,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:11:49,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:11:49,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 18:11:49,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 18:11:49,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 18:11:49,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 18:11:49,642 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-07-13 18:11:49,642 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-07-13 18:11:49,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 18:11:49,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 18:11:49,755 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 18:11:49,756 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 18:11:50,577 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 18:11:50,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 18:11:50,598 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2022-07-13 18:11:50,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:11:50 BoogieIcfgContainer [2022-07-13 18:11:50,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 18:11:50,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 18:11:50,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 18:11:50,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 18:11:50,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:11:48" (1/3) ... [2022-07-13 18:11:50,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3208427b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:11:50, skipping insertion in model container [2022-07-13 18:11:50,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:11:49" (2/3) ... [2022-07-13 18:11:50,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3208427b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:11:50, skipping insertion in model container [2022-07-13 18:11:50,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:11:50" (3/3) ... [2022-07-13 18:11:50,623 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.5.cil.c [2022-07-13 18:11:50,636 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 18:11:50,641 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 18:11:50,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 18:11:50,768 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4927ef87, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@516257a8 [2022-07-13 18:11:50,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 18:11:50,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 279 states, 271 states have (on average 1.8560885608856088) internal successors, (503), 277 states have internal predecessors, (503), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 18:11:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 18:11:50,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:11:50,803 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] [2022-07-13 18:11:50,804 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:11:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:11:50,817 INFO L85 PathProgramCache]: Analyzing trace with hash 193087859, now seen corresponding path program 1 times [2022-07-13 18:11:50,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:11:50,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805248701] [2022-07-13 18:11:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:11:50,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:11:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:11:51,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:11:51,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805248701] [2022-07-13 18:11:51,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805248701] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:11:51,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:11:51,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:11:51,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829550408] [2022-07-13 18:11:51,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:11:51,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:11:51,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:11:51,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:11:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:51,187 INFO L87 Difference]: Start difference. First operand has 279 states, 271 states have (on average 1.8560885608856088) internal successors, (503), 277 states have internal predecessors, (503), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:51,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:11:51,532 INFO L93 Difference]: Finished difference Result 736 states and 1353 transitions. [2022-07-13 18:11:51,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:11:51,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-13 18:11:51,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:11:51,549 INFO L225 Difference]: With dead ends: 736 [2022-07-13 18:11:51,550 INFO L226 Difference]: Without dead ends: 454 [2022-07-13 18:11:51,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:51,575 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 271 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 18:11:51,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 797 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 18:11:51,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-07-13 18:11:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 441. [2022-07-13 18:11:51,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 435 states have (on average 1.6045977011494252) internal successors, (698), 439 states have internal predecessors, (698), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:51,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 703 transitions. [2022-07-13 18:11:51,706 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 703 transitions. Word has length 29 [2022-07-13 18:11:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:11:51,707 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 703 transitions. [2022-07-13 18:11:51,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:51,707 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 703 transitions. [2022-07-13 18:11:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-13 18:11:51,709 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:11:51,709 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] [2022-07-13 18:11:51,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 18:11:51,709 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:11:51,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:11:51,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1865699697, now seen corresponding path program 1 times [2022-07-13 18:11:51,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:11:51,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444719708] [2022-07-13 18:11:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:11:51,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:11:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:11:51,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:11:51,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444719708] [2022-07-13 18:11:51,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444719708] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:11:51,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:11:51,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:11:51,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235516404] [2022-07-13 18:11:51,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:11:51,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:11:51,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:11:51,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:11:51,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:51,802 INFO L87 Difference]: Start difference. First operand 441 states and 703 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:11:51,917 INFO L93 Difference]: Finished difference Result 1161 states and 1877 transitions. [2022-07-13 18:11:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:11:51,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-13 18:11:51,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:11:51,920 INFO L225 Difference]: With dead ends: 1161 [2022-07-13 18:11:51,920 INFO L226 Difference]: Without dead ends: 734 [2022-07-13 18:11:51,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:51,926 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 334 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:11:51,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 1040 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:11:51,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-07-13 18:11:51,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 721. [2022-07-13 18:11:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 715 states have (on average 1.6391608391608392) internal successors, (1172), 719 states have internal predecessors, (1172), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1177 transitions. [2022-07-13 18:11:51,973 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1177 transitions. Word has length 41 [2022-07-13 18:11:51,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:11:51,974 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 1177 transitions. [2022-07-13 18:11:51,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:51,974 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1177 transitions. [2022-07-13 18:11:51,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-13 18:11:51,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:11:51,982 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] [2022-07-13 18:11:51,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 18:11:51,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:11:51,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:11:51,983 INFO L85 PathProgramCache]: Analyzing trace with hash 614817242, now seen corresponding path program 1 times [2022-07-13 18:11:51,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:11:51,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142596971] [2022-07-13 18:11:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:11:51,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:11:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:11:52,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:11:52,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142596971] [2022-07-13 18:11:52,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142596971] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:11:52,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:11:52,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:11:52,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665144502] [2022-07-13 18:11:52,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:11:52,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:11:52,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:11:52,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:11:52,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:52,060 INFO L87 Difference]: Start difference. First operand 721 states and 1177 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:52,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:11:52,162 INFO L93 Difference]: Finished difference Result 1809 states and 2948 transitions. [2022-07-13 18:11:52,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:11:52,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-13 18:11:52,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:11:52,167 INFO L225 Difference]: With dead ends: 1809 [2022-07-13 18:11:52,167 INFO L226 Difference]: Without dead ends: 1113 [2022-07-13 18:11:52,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:52,169 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 361 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:11:52,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 821 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:11:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-07-13 18:11:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1102. [2022-07-13 18:11:52,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1096 states have (on average 1.6259124087591241) internal successors, (1782), 1100 states have internal predecessors, (1782), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:52,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1787 transitions. [2022-07-13 18:11:52,220 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1787 transitions. Word has length 42 [2022-07-13 18:11:52,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:11:52,221 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1787 transitions. [2022-07-13 18:11:52,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:52,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1787 transitions. [2022-07-13 18:11:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 18:11:52,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:11:52,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:11:52,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 18:11:52,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:11:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:11:52,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2063798548, now seen corresponding path program 1 times [2022-07-13 18:11:52,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:11:52,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927313971] [2022-07-13 18:11:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:11:52,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:11:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:11:52,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:11:52,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927313971] [2022-07-13 18:11:52,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927313971] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:11:52,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:11:52,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 18:11:52,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210787180] [2022-07-13 18:11:52,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:11:52,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 18:11:52,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:11:52,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 18:11:52,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 18:11:52,306 INFO L87 Difference]: Start difference. First operand 1102 states and 1787 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:52,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:11:52,653 INFO L93 Difference]: Finished difference Result 3042 states and 4911 transitions. [2022-07-13 18:11:52,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 18:11:52,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-13 18:11:52,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:11:52,661 INFO L225 Difference]: With dead ends: 3042 [2022-07-13 18:11:52,661 INFO L226 Difference]: Without dead ends: 1965 [2022-07-13 18:11:52,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:11:52,672 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 592 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 18:11:52,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 1606 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 18:11:52,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-07-13 18:11:52,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1732. [2022-07-13 18:11:52,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1726 states have (on average 1.6025492468134415) internal successors, (2766), 1730 states have internal predecessors, (2766), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2771 transitions. [2022-07-13 18:11:52,736 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2771 transitions. Word has length 48 [2022-07-13 18:11:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:11:52,737 INFO L495 AbstractCegarLoop]: Abstraction has 1732 states and 2771 transitions. [2022-07-13 18:11:52,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:52,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2771 transitions. [2022-07-13 18:11:52,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 18:11:52,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:11:52,739 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] [2022-07-13 18:11:52,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 18:11:52,739 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:11:52,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:11:52,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1086798560, now seen corresponding path program 1 times [2022-07-13 18:11:52,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:11:52,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499836389] [2022-07-13 18:11:52,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:11:52,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:11:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:11:52,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:11:52,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499836389] [2022-07-13 18:11:52,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499836389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:11:52,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:11:52,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 18:11:52,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115710723] [2022-07-13 18:11:52,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:11:52,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 18:11:52,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:11:52,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 18:11:52,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 18:11:52,809 INFO L87 Difference]: Start difference. First operand 1732 states and 2771 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:53,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:11:53,171 INFO L93 Difference]: Finished difference Result 5153 states and 8152 transitions. [2022-07-13 18:11:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 18:11:53,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-13 18:11:53,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:11:53,183 INFO L225 Difference]: With dead ends: 5153 [2022-07-13 18:11:53,183 INFO L226 Difference]: Without dead ends: 3440 [2022-07-13 18:11:53,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:11:53,187 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 758 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 18:11:53,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 1088 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 18:11:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2022-07-13 18:11:53,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3058. [2022-07-13 18:11:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3058 states, 3052 states have (on average 1.577653997378768) internal successors, (4815), 3056 states have internal predecessors, (4815), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 4820 transitions. [2022-07-13 18:11:53,337 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 4820 transitions. Word has length 53 [2022-07-13 18:11:53,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:11:53,339 INFO L495 AbstractCegarLoop]: Abstraction has 3058 states and 4820 transitions. [2022-07-13 18:11:53,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:53,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 4820 transitions. [2022-07-13 18:11:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 18:11:53,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:11:53,341 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] [2022-07-13 18:11:53,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 18:11:53,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:11:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:11:53,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1057985577, now seen corresponding path program 1 times [2022-07-13 18:11:53,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:11:53,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352046176] [2022-07-13 18:11:53,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:11:53,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:11:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:11:53,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:11:53,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352046176] [2022-07-13 18:11:53,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352046176] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:11:53,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:11:53,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:11:53,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168239324] [2022-07-13 18:11:53,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:11:53,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:11:53,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:11:53,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:11:53,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:53,421 INFO L87 Difference]: Start difference. First operand 3058 states and 4820 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:53,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:11:53,578 INFO L93 Difference]: Finished difference Result 7193 states and 11301 transitions. [2022-07-13 18:11:53,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:11:53,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-13 18:11:53,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:11:53,592 INFO L225 Difference]: With dead ends: 7193 [2022-07-13 18:11:53,607 INFO L226 Difference]: Without dead ends: 4158 [2022-07-13 18:11:53,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:53,628 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 376 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:11:53,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 728 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:11:53,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4158 states. [2022-07-13 18:11:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4158 to 3974. [2022-07-13 18:11:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3968 states have (on average 1.5597278225806452) internal successors, (6189), 3972 states have internal predecessors, (6189), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 6194 transitions. [2022-07-13 18:11:53,835 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 6194 transitions. Word has length 53 [2022-07-13 18:11:53,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:11:53,838 INFO L495 AbstractCegarLoop]: Abstraction has 3974 states and 6194 transitions. [2022-07-13 18:11:53,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:53,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 6194 transitions. [2022-07-13 18:11:53,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 18:11:53,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:11:53,841 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] [2022-07-13 18:11:53,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 18:11:53,841 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:11:53,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:11:53,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1920778764, now seen corresponding path program 1 times [2022-07-13 18:11:53,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:11:53,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143599500] [2022-07-13 18:11:53,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:11:53,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:11:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:11:53,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:11:53,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143599500] [2022-07-13 18:11:53,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143599500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:11:53,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:11:53,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:11:53,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019861916] [2022-07-13 18:11:53,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:11:53,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:11:53,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:11:53,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:11:53,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:53,935 INFO L87 Difference]: Start difference. First operand 3974 states and 6194 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:11:54,365 INFO L93 Difference]: Finished difference Result 9562 states and 15028 transitions. [2022-07-13 18:11:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:11:54,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-13 18:11:54,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:11:54,396 INFO L225 Difference]: With dead ends: 9562 [2022-07-13 18:11:54,409 INFO L226 Difference]: Without dead ends: 5611 [2022-07-13 18:11:54,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:54,417 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 258 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 18:11:54,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 897 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 18:11:54,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2022-07-13 18:11:54,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 4818. [2022-07-13 18:11:54,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4812 states have (on average 1.5045719035743974) internal successors, (7240), 4816 states have internal predecessors, (7240), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:54,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 7245 transitions. [2022-07-13 18:11:54,712 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 7245 transitions. Word has length 62 [2022-07-13 18:11:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:11:54,712 INFO L495 AbstractCegarLoop]: Abstraction has 4818 states and 7245 transitions. [2022-07-13 18:11:54,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:54,713 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 7245 transitions. [2022-07-13 18:11:54,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 18:11:54,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:11:54,714 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] [2022-07-13 18:11:54,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 18:11:54,715 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:11:54,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:11:54,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1239764768, now seen corresponding path program 1 times [2022-07-13 18:11:54,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:11:54,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616447781] [2022-07-13 18:11:54,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:11:54,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:11:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:11:54,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:11:54,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616447781] [2022-07-13 18:11:54,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616447781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:11:54,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:11:54,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:11:54,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094273474] [2022-07-13 18:11:54,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:11:54,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:11:54,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:11:54,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:11:54,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:54,783 INFO L87 Difference]: Start difference. First operand 4818 states and 7245 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:11:54,979 INFO L93 Difference]: Finished difference Result 9479 states and 14267 transitions. [2022-07-13 18:11:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:11:54,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-13 18:11:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:11:54,995 INFO L225 Difference]: With dead ends: 9479 [2022-07-13 18:11:54,995 INFO L226 Difference]: Without dead ends: 4684 [2022-07-13 18:11:55,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:55,003 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 353 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:11:55,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 451 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:11:55,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2022-07-13 18:11:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 4684. [2022-07-13 18:11:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 4678 states have (on average 1.4833262077811031) internal successors, (6939), 4682 states have internal predecessors, (6939), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 6944 transitions. [2022-07-13 18:11:55,186 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 6944 transitions. Word has length 64 [2022-07-13 18:11:55,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:11:55,186 INFO L495 AbstractCegarLoop]: Abstraction has 4684 states and 6944 transitions. [2022-07-13 18:11:55,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:55,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 6944 transitions. [2022-07-13 18:11:55,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 18:11:55,189 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:11:55,190 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] [2022-07-13 18:11:55,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 18:11:55,190 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:11:55,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:11:55,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1801528906, now seen corresponding path program 1 times [2022-07-13 18:11:55,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:11:55,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177686654] [2022-07-13 18:11:55,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:11:55,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:11:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:11:55,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:11:55,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177686654] [2022-07-13 18:11:55,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177686654] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:11:55,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:11:55,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:11:55,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895241371] [2022-07-13 18:11:55,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:11:55,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:11:55,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:11:55,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:11:55,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:55,217 INFO L87 Difference]: Start difference. First operand 4684 states and 6944 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:55,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:11:55,413 INFO L93 Difference]: Finished difference Result 10012 states and 15006 transitions. [2022-07-13 18:11:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:11:55,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-13 18:11:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:11:55,441 INFO L225 Difference]: With dead ends: 10012 [2022-07-13 18:11:55,441 INFO L226 Difference]: Without dead ends: 5351 [2022-07-13 18:11:55,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:55,450 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 317 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:11:55,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 1018 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:11:55,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2022-07-13 18:11:55,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 3586. [2022-07-13 18:11:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3580 states have (on average 1.497486033519553) internal successors, (5361), 3584 states have internal predecessors, (5361), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 5366 transitions. [2022-07-13 18:11:55,622 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 5366 transitions. Word has length 65 [2022-07-13 18:11:55,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:11:55,623 INFO L495 AbstractCegarLoop]: Abstraction has 3586 states and 5366 transitions. [2022-07-13 18:11:55,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:55,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 5366 transitions. [2022-07-13 18:11:55,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 18:11:55,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:11:55,625 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] [2022-07-13 18:11:55,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 18:11:55,625 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:11:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:11:55,626 INFO L85 PathProgramCache]: Analyzing trace with hash -106317501, now seen corresponding path program 1 times [2022-07-13 18:11:55,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:11:55,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863675890] [2022-07-13 18:11:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:11:55,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:11:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:11:55,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:11:55,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863675890] [2022-07-13 18:11:55,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863675890] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:11:55,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:11:55,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:11:55,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588665137] [2022-07-13 18:11:55,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:11:55,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:11:55,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:11:55,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:11:55,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:11:55,705 INFO L87 Difference]: Start difference. First operand 3586 states and 5366 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:56,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:11:56,593 INFO L93 Difference]: Finished difference Result 16912 states and 25065 transitions. [2022-07-13 18:11:56,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 18:11:56,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-13 18:11:56,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:11:56,644 INFO L225 Difference]: With dead ends: 16912 [2022-07-13 18:11:56,644 INFO L226 Difference]: Without dead ends: 13551 [2022-07-13 18:11:56,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-07-13 18:11:56,668 INFO L413 NwaCegarLoop]: 1078 mSDtfsCounter, 2149 mSDsluCounter, 2983 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2149 SdHoareTripleChecker+Valid, 4061 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 18:11:56,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2149 Valid, 4061 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 18:11:56,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13551 states. [2022-07-13 18:11:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13551 to 4456. [2022-07-13 18:11:57,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4456 states, 4450 states have (on average 1.4883146067415731) internal successors, (6623), 4454 states have internal predecessors, (6623), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4456 states to 4456 states and 6628 transitions. [2022-07-13 18:11:57,048 INFO L78 Accepts]: Start accepts. Automaton has 4456 states and 6628 transitions. Word has length 67 [2022-07-13 18:11:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:11:57,049 INFO L495 AbstractCegarLoop]: Abstraction has 4456 states and 6628 transitions. [2022-07-13 18:11:57,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:57,049 INFO L276 IsEmpty]: Start isEmpty. Operand 4456 states and 6628 transitions. [2022-07-13 18:11:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 18:11:57,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:11:57,050 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] [2022-07-13 18:11:57,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 18:11:57,051 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:11:57,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:11:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1482385041, now seen corresponding path program 1 times [2022-07-13 18:11:57,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:11:57,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862438743] [2022-07-13 18:11:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:11:57,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:11:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:11:57,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:11:57,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862438743] [2022-07-13 18:11:57,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862438743] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:11:57,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:11:57,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:11:57,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49980759] [2022-07-13 18:11:57,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:11:57,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:11:57,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:11:57,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:11:57,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:11:57,099 INFO L87 Difference]: Start difference. First operand 4456 states and 6628 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:11:58,784 INFO L93 Difference]: Finished difference Result 30607 states and 45155 transitions. [2022-07-13 18:11:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 18:11:58,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-13 18:11:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:11:58,899 INFO L225 Difference]: With dead ends: 30607 [2022-07-13 18:11:58,899 INFO L226 Difference]: Without dead ends: 26376 [2022-07-13 18:11:58,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-07-13 18:11:58,931 INFO L413 NwaCegarLoop]: 1893 mSDtfsCounter, 3845 mSDsluCounter, 6826 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3845 SdHoareTripleChecker+Valid, 8719 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 18:11:58,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3845 Valid, 8719 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 18:11:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26376 states. [2022-07-13 18:11:59,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26376 to 4766. [2022-07-13 18:11:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4766 states, 4760 states have (on average 1.4779411764705883) internal successors, (7035), 4764 states have internal predecessors, (7035), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4766 states to 4766 states and 7040 transitions. [2022-07-13 18:11:59,444 INFO L78 Accepts]: Start accepts. Automaton has 4766 states and 7040 transitions. Word has length 68 [2022-07-13 18:11:59,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:11:59,445 INFO L495 AbstractCegarLoop]: Abstraction has 4766 states and 7040 transitions. [2022-07-13 18:11:59,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:59,445 INFO L276 IsEmpty]: Start isEmpty. Operand 4766 states and 7040 transitions. [2022-07-13 18:11:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 18:11:59,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:11:59,447 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:11:59,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 18:11:59,448 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:11:59,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:11:59,448 INFO L85 PathProgramCache]: Analyzing trace with hash 810462579, now seen corresponding path program 1 times [2022-07-13 18:11:59,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:11:59,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482725357] [2022-07-13 18:11:59,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:11:59,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:11:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:11:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:11:59,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:11:59,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482725357] [2022-07-13 18:11:59,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482725357] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:11:59,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:11:59,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:11:59,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110816770] [2022-07-13 18:11:59,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:11:59,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:11:59,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:11:59,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:11:59,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:59,492 INFO L87 Difference]: Start difference. First operand 4766 states and 7040 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:11:59,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:11:59,826 INFO L93 Difference]: Finished difference Result 10055 states and 14832 transitions. [2022-07-13 18:11:59,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:11:59,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-13 18:11:59,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:11:59,836 INFO L225 Difference]: With dead ends: 10055 [2022-07-13 18:11:59,837 INFO L226 Difference]: Without dead ends: 5310 [2022-07-13 18:11:59,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:11:59,843 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 143 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:11:59,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 834 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:11:59,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5310 states. [2022-07-13 18:12:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5310 to 5236. [2022-07-13 18:12:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5236 states, 5230 states have (on average 1.4747609942638624) internal successors, (7713), 5234 states have internal predecessors, (7713), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:00,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 7718 transitions. [2022-07-13 18:12:00,050 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 7718 transitions. Word has length 79 [2022-07-13 18:12:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:00,050 INFO L495 AbstractCegarLoop]: Abstraction has 5236 states and 7718 transitions. [2022-07-13 18:12:00,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 7718 transitions. [2022-07-13 18:12:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 18:12:00,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:00,052 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-13 18:12:00,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 18:12:00,053 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:00,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:00,053 INFO L85 PathProgramCache]: Analyzing trace with hash -22506739, now seen corresponding path program 1 times [2022-07-13 18:12:00,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:00,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789658517] [2022-07-13 18:12:00,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:00,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:12:00,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:00,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789658517] [2022-07-13 18:12:00,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789658517] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:12:00,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:12:00,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 18:12:00,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033790703] [2022-07-13 18:12:00,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:12:00,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 18:12:00,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 18:12:00,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 18:12:00,085 INFO L87 Difference]: Start difference. First operand 5236 states and 7718 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:00,918 INFO L93 Difference]: Finished difference Result 14006 states and 20488 transitions. [2022-07-13 18:12:00,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:12:00,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-13 18:12:00,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:00,950 INFO L225 Difference]: With dead ends: 14006 [2022-07-13 18:12:00,963 INFO L226 Difference]: Without dead ends: 8669 [2022-07-13 18:12:00,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:12:00,980 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 658 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:00,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 1288 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 18:12:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8669 states. [2022-07-13 18:12:01,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8669 to 7699. [2022-07-13 18:12:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7699 states, 7693 states have (on average 1.443000129988301) internal successors, (11101), 7697 states have internal predecessors, (11101), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7699 states to 7699 states and 11106 transitions. [2022-07-13 18:12:01,540 INFO L78 Accepts]: Start accepts. Automaton has 7699 states and 11106 transitions. Word has length 91 [2022-07-13 18:12:01,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:01,540 INFO L495 AbstractCegarLoop]: Abstraction has 7699 states and 11106 transitions. [2022-07-13 18:12:01,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 7699 states and 11106 transitions. [2022-07-13 18:12:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-13 18:12:01,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:01,559 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-13 18:12:01,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 18:12:01,560 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:01,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:01,560 INFO L85 PathProgramCache]: Analyzing trace with hash 713103324, now seen corresponding path program 1 times [2022-07-13 18:12:01,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:01,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178865566] [2022-07-13 18:12:01,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:01,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:12:01,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:01,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178865566] [2022-07-13 18:12:01,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178865566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:12:01,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:12:01,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:12:01,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502027722] [2022-07-13 18:12:01,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:12:01,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:12:01,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:01,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:12:01,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:12:01,588 INFO L87 Difference]: Start difference. First operand 7699 states and 11106 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:01,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:01,803 INFO L93 Difference]: Finished difference Result 11093 states and 16026 transitions. [2022-07-13 18:12:01,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:12:01,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-07-13 18:12:01,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:01,831 INFO L225 Difference]: With dead ends: 11093 [2022-07-13 18:12:01,831 INFO L226 Difference]: Without dead ends: 3397 [2022-07-13 18:12:01,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:12:01,841 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 347 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:01,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 529 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:12:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3397 states. [2022-07-13 18:12:02,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3397 to 3344. [2022-07-13 18:12:02,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3338 states have (on average 1.3523067705212701) internal successors, (4514), 3342 states have internal predecessors, (4514), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:02,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 4519 transitions. [2022-07-13 18:12:02,139 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 4519 transitions. Word has length 99 [2022-07-13 18:12:02,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:02,139 INFO L495 AbstractCegarLoop]: Abstraction has 3344 states and 4519 transitions. [2022-07-13 18:12:02,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 4519 transitions. [2022-07-13 18:12:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-13 18:12:02,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:02,141 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, 1, 1] [2022-07-13 18:12:02,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 18:12:02,141 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:02,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1037594014, now seen corresponding path program 1 times [2022-07-13 18:12:02,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:02,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508027693] [2022-07-13 18:12:02,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:02,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:12:02,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:02,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508027693] [2022-07-13 18:12:02,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508027693] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:12:02,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:12:02,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:12:02,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067199066] [2022-07-13 18:12:02,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:12:02,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:12:02,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:02,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:12:02,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:12:02,267 INFO L87 Difference]: Start difference. First operand 3344 states and 4519 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:03,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:03,009 INFO L93 Difference]: Finished difference Result 12772 states and 17244 transitions. [2022-07-13 18:12:03,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 18:12:03,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-13 18:12:03,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:03,038 INFO L225 Difference]: With dead ends: 12772 [2022-07-13 18:12:03,038 INFO L226 Difference]: Without dead ends: 9605 [2022-07-13 18:12:03,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-13 18:12:03,047 INFO L413 NwaCegarLoop]: 1094 mSDtfsCounter, 1560 mSDsluCounter, 2344 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 3438 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:03,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1560 Valid, 3438 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 18:12:03,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2022-07-13 18:12:03,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 3346. [2022-07-13 18:12:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3346 states, 3340 states have (on average 1.3502994011976048) internal successors, (4510), 3344 states have internal predecessors, (4510), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3346 states to 3346 states and 4515 transitions. [2022-07-13 18:12:03,402 INFO L78 Accepts]: Start accepts. Automaton has 3346 states and 4515 transitions. Word has length 101 [2022-07-13 18:12:03,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:03,402 INFO L495 AbstractCegarLoop]: Abstraction has 3346 states and 4515 transitions. [2022-07-13 18:12:03,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3346 states and 4515 transitions. [2022-07-13 18:12:03,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 18:12:03,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:03,404 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, 1, 1, 1, 1] [2022-07-13 18:12:03,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 18:12:03,404 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:03,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:03,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1285693593, now seen corresponding path program 1 times [2022-07-13 18:12:03,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:03,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637731334] [2022-07-13 18:12:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:03,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:12:03,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:03,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637731334] [2022-07-13 18:12:03,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637731334] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:03,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969807324] [2022-07-13 18:12:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:03,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:03,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:03,441 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:03,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 18:12:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:03,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 18:12:03,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:12:03,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 18:12:03,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 18:12:03,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969807324] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:12:03,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 18:12:03,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-13 18:12:03,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132760881] [2022-07-13 18:12:03,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:12:03,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:12:03,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:03,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:12:03,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:12:03,886 INFO L87 Difference]: Start difference. First operand 3346 states and 4515 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:04,251 INFO L93 Difference]: Finished difference Result 3993 states and 5384 transitions. [2022-07-13 18:12:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:12:04,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-07-13 18:12:04,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:04,259 INFO L225 Difference]: With dead ends: 3993 [2022-07-13 18:12:04,260 INFO L226 Difference]: Without dead ends: 3989 [2022-07-13 18:12:04,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:12:04,262 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 241 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:04,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 819 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:12:04,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3989 states. [2022-07-13 18:12:04,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3989 to 3939. [2022-07-13 18:12:04,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3939 states, 3933 states have (on average 1.3478260869565217) internal successors, (5301), 3937 states have internal predecessors, (5301), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:04,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3939 states to 3939 states and 5306 transitions. [2022-07-13 18:12:04,585 INFO L78 Accepts]: Start accepts. Automaton has 3939 states and 5306 transitions. Word has length 103 [2022-07-13 18:12:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:04,585 INFO L495 AbstractCegarLoop]: Abstraction has 3939 states and 5306 transitions. [2022-07-13 18:12:04,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:04,585 INFO L276 IsEmpty]: Start isEmpty. Operand 3939 states and 5306 transitions. [2022-07-13 18:12:04,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-13 18:12:04,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:04,588 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:12:04,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 18:12:04,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 18:12:04,804 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:04,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:04,804 INFO L85 PathProgramCache]: Analyzing trace with hash -219637223, now seen corresponding path program 1 times [2022-07-13 18:12:04,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:04,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189567388] [2022-07-13 18:12:04,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:04,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:12:04,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:04,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189567388] [2022-07-13 18:12:04,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189567388] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:04,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566429106] [2022-07-13 18:12:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:04,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:04,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:04,881 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:04,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 18:12:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:05,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 18:12:05,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:12:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 18:12:05,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 18:12:05,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566429106] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:12:05,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 18:12:05,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-13 18:12:05,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095297541] [2022-07-13 18:12:05,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:12:05,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:12:05,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:05,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:12:05,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:12:05,392 INFO L87 Difference]: Start difference. First operand 3939 states and 5306 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:05,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:05,629 INFO L93 Difference]: Finished difference Result 7022 states and 9512 transitions. [2022-07-13 18:12:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:12:05,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-07-13 18:12:05,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:05,634 INFO L225 Difference]: With dead ends: 7022 [2022-07-13 18:12:05,634 INFO L226 Difference]: Without dead ends: 3088 [2022-07-13 18:12:05,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:12:05,641 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 272 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:05,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 430 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:12:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2022-07-13 18:12:05,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 2866. [2022-07-13 18:12:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2860 states have (on average 1.3297202797202796) internal successors, (3803), 2864 states have internal predecessors, (3803), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 3808 transitions. [2022-07-13 18:12:05,854 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 3808 transitions. Word has length 160 [2022-07-13 18:12:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:05,854 INFO L495 AbstractCegarLoop]: Abstraction has 2866 states and 3808 transitions. [2022-07-13 18:12:05,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:05,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 3808 transitions. [2022-07-13 18:12:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-13 18:12:05,857 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:05,857 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:12:05,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 18:12:06,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 18:12:06,080 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:06,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:06,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1280711905, now seen corresponding path program 1 times [2022-07-13 18:12:06,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:06,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154792994] [2022-07-13 18:12:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:06,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 18:12:06,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:06,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154792994] [2022-07-13 18:12:06,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154792994] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:06,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882573320] [2022-07-13 18:12:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:06,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:06,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:06,153 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:06,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 18:12:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:06,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 18:12:06,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:12:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 18:12:06,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 18:12:06,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882573320] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:12:06,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 18:12:06,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-13 18:12:06,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601261761] [2022-07-13 18:12:06,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:12:06,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:12:06,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:06,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:12:06,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:12:06,352 INFO L87 Difference]: Start difference. First operand 2866 states and 3808 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:06,577 INFO L93 Difference]: Finished difference Result 5560 states and 7429 transitions. [2022-07-13 18:12:06,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:12:06,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2022-07-13 18:12:06,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:06,581 INFO L225 Difference]: With dead ends: 5560 [2022-07-13 18:12:06,581 INFO L226 Difference]: Without dead ends: 2866 [2022-07-13 18:12:06,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:12:06,585 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 282 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:06,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 402 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:12:06,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2022-07-13 18:12:06,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2866. [2022-07-13 18:12:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2860 states have (on average 1.2961538461538462) internal successors, (3707), 2864 states have internal predecessors, (3707), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 3712 transitions. [2022-07-13 18:12:06,768 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 3712 transitions. Word has length 163 [2022-07-13 18:12:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:06,768 INFO L495 AbstractCegarLoop]: Abstraction has 2866 states and 3712 transitions. [2022-07-13 18:12:06,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 3712 transitions. [2022-07-13 18:12:06,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-13 18:12:06,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:06,770 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:12:06,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 18:12:06,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 18:12:06,988 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:06,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:06,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1156524976, now seen corresponding path program 1 times [2022-07-13 18:12:06,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:06,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645002916] [2022-07-13 18:12:06,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:06,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 18:12:07,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645002916] [2022-07-13 18:12:07,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645002916] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924196641] [2022-07-13 18:12:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:07,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:07,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:07,023 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:07,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 18:12:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:07,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 18:12:07,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:12:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 18:12:07,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 18:12:07,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924196641] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:12:07,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 18:12:07,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-13 18:12:07,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126340884] [2022-07-13 18:12:07,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:12:07,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:12:07,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:07,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:12:07,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:12:07,160 INFO L87 Difference]: Start difference. First operand 2866 states and 3712 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:07,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:07,573 INFO L93 Difference]: Finished difference Result 6487 states and 8570 transitions. [2022-07-13 18:12:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:12:07,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2022-07-13 18:12:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:07,578 INFO L225 Difference]: With dead ends: 6487 [2022-07-13 18:12:07,578 INFO L226 Difference]: Without dead ends: 3793 [2022-07-13 18:12:07,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:12:07,582 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 213 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:07,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 684 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 18:12:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3793 states. [2022-07-13 18:12:07,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3793 to 3705. [2022-07-13 18:12:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 3699 states have (on average 1.2660178426601785) internal successors, (4683), 3703 states have internal predecessors, (4683), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 4688 transitions. [2022-07-13 18:12:07,777 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 4688 transitions. Word has length 164 [2022-07-13 18:12:07,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:07,778 INFO L495 AbstractCegarLoop]: Abstraction has 3705 states and 4688 transitions. [2022-07-13 18:12:07,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:07,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 4688 transitions. [2022-07-13 18:12:07,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-13 18:12:07,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:07,779 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:12:07,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 18:12:07,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:07,996 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:07,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1102689509, now seen corresponding path program 1 times [2022-07-13 18:12:07,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:07,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908193006] [2022-07-13 18:12:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:07,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 18:12:08,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:08,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908193006] [2022-07-13 18:12:08,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908193006] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:08,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280550050] [2022-07-13 18:12:08,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:08,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:08,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:08,080 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:08,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 18:12:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:08,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 18:12:08,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:12:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 18:12:08,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:12:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 18:12:08,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280550050] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:12:08,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:12:08,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-07-13 18:12:08,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801028463] [2022-07-13 18:12:08,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:12:08,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 18:12:08,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:08,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 18:12:08,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-13 18:12:08,547 INFO L87 Difference]: Start difference. First operand 3705 states and 4688 transitions. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:09,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:09,888 INFO L93 Difference]: Finished difference Result 18600 states and 23623 transitions. [2022-07-13 18:12:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 18:12:09,888 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2022-07-13 18:12:09,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:09,904 INFO L225 Difference]: With dead ends: 18600 [2022-07-13 18:12:09,904 INFO L226 Difference]: Without dead ends: 15067 [2022-07-13 18:12:09,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 341 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 18:12:09,910 INFO L413 NwaCegarLoop]: 889 mSDtfsCounter, 4181 mSDsluCounter, 4852 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4181 SdHoareTripleChecker+Valid, 5741 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:09,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4181 Valid, 5741 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 18:12:09,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15067 states. [2022-07-13 18:12:10,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15067 to 5254. [2022-07-13 18:12:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5254 states, 5248 states have (on average 1.271341463414634) internal successors, (6672), 5252 states have internal predecessors, (6672), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:10,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5254 states to 5254 states and 6677 transitions. [2022-07-13 18:12:10,254 INFO L78 Accepts]: Start accepts. Automaton has 5254 states and 6677 transitions. Word has length 166 [2022-07-13 18:12:10,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:10,254 INFO L495 AbstractCegarLoop]: Abstraction has 5254 states and 6677 transitions. [2022-07-13 18:12:10,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 5254 states and 6677 transitions. [2022-07-13 18:12:10,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-07-13 18:12:10,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:10,257 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 18:12:10,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 18:12:10,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:10,471 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:10,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:10,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1782230669, now seen corresponding path program 1 times [2022-07-13 18:12:10,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:10,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081341438] [2022-07-13 18:12:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:10,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 18:12:10,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:10,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081341438] [2022-07-13 18:12:10,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081341438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:10,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879125279] [2022-07-13 18:12:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:10,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:10,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:10,612 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:10,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 18:12:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:10,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 18:12:10,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:12:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 18:12:11,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:12:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 10 proven. 196 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 18:12:11,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879125279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:12:11,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:12:11,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-07-13 18:12:11,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238284924] [2022-07-13 18:12:11,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:12:11,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 18:12:11,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:11,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 18:12:11,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-13 18:12:11,454 INFO L87 Difference]: Start difference. First operand 5254 states and 6677 transitions. Second operand has 11 states, 11 states have (on average 23.636363636363637) internal successors, (260), 11 states have internal predecessors, (260), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:13,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:13,479 INFO L93 Difference]: Finished difference Result 24208 states and 30652 transitions. [2022-07-13 18:12:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-13 18:12:13,483 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 23.636363636363637) internal successors, (260), 11 states have internal predecessors, (260), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-07-13 18:12:13,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:13,507 INFO L225 Difference]: With dead ends: 24208 [2022-07-13 18:12:13,507 INFO L226 Difference]: Without dead ends: 19126 [2022-07-13 18:12:13,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 545 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2022-07-13 18:12:13,519 INFO L413 NwaCegarLoop]: 1494 mSDtfsCounter, 5839 mSDsluCounter, 10366 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5839 SdHoareTripleChecker+Valid, 11860 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:13,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5839 Valid, 11860 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 18:12:13,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19126 states. [2022-07-13 18:12:14,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19126 to 6677. [2022-07-13 18:12:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6677 states, 6671 states have (on average 1.272822665267576) internal successors, (8491), 6675 states have internal predecessors, (8491), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:14,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6677 states to 6677 states and 8496 transitions. [2022-07-13 18:12:14,084 INFO L78 Accepts]: Start accepts. Automaton has 6677 states and 8496 transitions. Word has length 266 [2022-07-13 18:12:14,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:14,084 INFO L495 AbstractCegarLoop]: Abstraction has 6677 states and 8496 transitions. [2022-07-13 18:12:14,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.636363636363637) internal successors, (260), 11 states have internal predecessors, (260), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 6677 states and 8496 transitions. [2022-07-13 18:12:14,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2022-07-13 18:12:14,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:14,087 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:12:14,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 18:12:14,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:14,296 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1036581045, now seen corresponding path program 1 times [2022-07-13 18:12:14,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:14,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150271517] [2022-07-13 18:12:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:14,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 18:12:14,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:14,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150271517] [2022-07-13 18:12:14,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150271517] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:14,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312110104] [2022-07-13 18:12:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:14,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:14,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:14,529 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:14,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 18:12:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:14,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-13 18:12:14,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:12:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 18:12:15,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:12:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 15 proven. 457 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 18:12:15,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312110104] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:12:15,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:12:15,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2022-07-13 18:12:15,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262192861] [2022-07-13 18:12:15,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:12:15,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 18:12:15,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:15,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 18:12:15,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-07-13 18:12:15,827 INFO L87 Difference]: Start difference. First operand 6677 states and 8496 transitions. Second operand has 13 states, 13 states have (on average 27.615384615384617) internal successors, (359), 13 states have internal predecessors, (359), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:19,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:19,412 INFO L93 Difference]: Finished difference Result 29894 states and 37793 transitions. [2022-07-13 18:12:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-13 18:12:19,416 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 27.615384615384617) internal successors, (359), 13 states have internal predecessors, (359), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 367 [2022-07-13 18:12:19,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:19,452 INFO L225 Difference]: With dead ends: 29894 [2022-07-13 18:12:19,452 INFO L226 Difference]: Without dead ends: 23389 [2022-07-13 18:12:19,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 751 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=315, Invalid=2655, Unknown=0, NotChecked=0, Total=2970 [2022-07-13 18:12:19,496 INFO L413 NwaCegarLoop]: 2133 mSDtfsCounter, 7747 mSDsluCounter, 18920 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7747 SdHoareTripleChecker+Valid, 21053 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:19,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7747 Valid, 21053 Invalid, 1701 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [266 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 18:12:19,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23389 states. [2022-07-13 18:12:20,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23389 to 8102. [2022-07-13 18:12:20,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8102 states, 8096 states have (on average 1.273715415019763) internal successors, (10312), 8100 states have internal predecessors, (10312), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:20,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8102 states to 8102 states and 10317 transitions. [2022-07-13 18:12:20,366 INFO L78 Accepts]: Start accepts. Automaton has 8102 states and 10317 transitions. Word has length 367 [2022-07-13 18:12:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:20,368 INFO L495 AbstractCegarLoop]: Abstraction has 8102 states and 10317 transitions. [2022-07-13 18:12:20,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 27.615384615384617) internal successors, (359), 13 states have internal predecessors, (359), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:20,368 INFO L276 IsEmpty]: Start isEmpty. Operand 8102 states and 10317 transitions. [2022-07-13 18:12:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2022-07-13 18:12:20,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:20,371 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:12:20,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 18:12:20,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:20,584 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1736090188, now seen corresponding path program 1 times [2022-07-13 18:12:20,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:20,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874432862] [2022-07-13 18:12:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:20,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 20 proven. 828 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 18:12:20,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:20,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874432862] [2022-07-13 18:12:20,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874432862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:20,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126317245] [2022-07-13 18:12:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:20,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:20,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:20,981 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:20,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 18:12:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:21,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 1340 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 18:12:21,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:12:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 20 proven. 828 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 18:12:22,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:12:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 20 proven. 828 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 18:12:22,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126317245] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:12:22,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:12:22,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2022-07-13 18:12:22,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196305025] [2022-07-13 18:12:22,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:12:22,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 18:12:22,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:22,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 18:12:22,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-07-13 18:12:22,930 INFO L87 Difference]: Start difference. First operand 8102 states and 10317 transitions. Second operand has 15 states, 15 states have (on average 30.6) internal successors, (459), 15 states have internal predecessors, (459), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:27,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:27,591 INFO L93 Difference]: Finished difference Result 35584 states and 44938 transitions. [2022-07-13 18:12:27,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-13 18:12:27,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 30.6) internal successors, (459), 15 states have internal predecessors, (459), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 469 [2022-07-13 18:12:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:27,649 INFO L225 Difference]: With dead ends: 35584 [2022-07-13 18:12:27,649 INFO L226 Difference]: Without dead ends: 27654 [2022-07-13 18:12:27,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 959 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=369, Invalid=3921, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 18:12:27,664 INFO L413 NwaCegarLoop]: 2772 mSDtfsCounter, 9655 mSDsluCounter, 30028 mSDsCounter, 0 mSdLazyCounter, 2230 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9655 SdHoareTripleChecker+Valid, 32800 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 2230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:27,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9655 Valid, 32800 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 2230 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 18:12:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27654 states. [2022-07-13 18:12:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27654 to 9529. [2022-07-13 18:12:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9529 states, 9523 states have (on average 1.274283314081697) internal successors, (12135), 9527 states have internal predecessors, (12135), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9529 states to 9529 states and 12140 transitions. [2022-07-13 18:12:28,673 INFO L78 Accepts]: Start accepts. Automaton has 9529 states and 12140 transitions. Word has length 469 [2022-07-13 18:12:28,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:28,674 INFO L495 AbstractCegarLoop]: Abstraction has 9529 states and 12140 transitions. [2022-07-13 18:12:28,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 30.6) internal successors, (459), 15 states have internal predecessors, (459), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:28,675 INFO L276 IsEmpty]: Start isEmpty. Operand 9529 states and 12140 transitions. [2022-07-13 18:12:28,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2022-07-13 18:12:28,678 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:28,679 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:12:28,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 18:12:28,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-13 18:12:28,898 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:28,898 INFO L85 PathProgramCache]: Analyzing trace with hash 408367013, now seen corresponding path program 1 times [2022-07-13 18:12:28,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:28,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370945792] [2022-07-13 18:12:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:28,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1356 backedges. 929 proven. 406 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 18:12:29,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:29,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370945792] [2022-07-13 18:12:29,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370945792] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:29,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008655864] [2022-07-13 18:12:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:29,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:29,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:29,210 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:29,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 18:12:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:29,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1605 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 18:12:29,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:12:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1356 backedges. 1335 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 18:12:30,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 18:12:30,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008655864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:12:30,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 18:12:30,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2022-07-13 18:12:30,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674390230] [2022-07-13 18:12:30,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:12:30,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 18:12:30,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:30,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 18:12:30,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-13 18:12:30,110 INFO L87 Difference]: Start difference. First operand 9529 states and 12140 transitions. Second operand has 13 states, 13 states have (on average 43.07692307692308) internal successors, (560), 13 states have internal predecessors, (560), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:32,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:32,367 INFO L93 Difference]: Finished difference Result 22293 states and 28260 transitions. [2022-07-13 18:12:32,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 18:12:32,368 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 43.07692307692308) internal successors, (560), 13 states have internal predecessors, (560), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 572 [2022-07-13 18:12:32,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:32,392 INFO L225 Difference]: With dead ends: 22293 [2022-07-13 18:12:32,393 INFO L226 Difference]: Without dead ends: 12933 [2022-07-13 18:12:32,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2022-07-13 18:12:32,409 INFO L413 NwaCegarLoop]: 2052 mSDtfsCounter, 3517 mSDsluCounter, 7612 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3517 SdHoareTripleChecker+Valid, 9664 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:32,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3517 Valid, 9664 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 18:12:32,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12933 states. [2022-07-13 18:12:33,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12933 to 9398. [2022-07-13 18:12:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9392 states have (on average 1.273317717206133) internal successors, (11959), 9396 states have internal predecessors, (11959), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 11964 transitions. [2022-07-13 18:12:33,475 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 11964 transitions. Word has length 572 [2022-07-13 18:12:33,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:33,476 INFO L495 AbstractCegarLoop]: Abstraction has 9398 states and 11964 transitions. [2022-07-13 18:12:33,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 43.07692307692308) internal successors, (560), 13 states have internal predecessors, (560), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:33,480 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 11964 transitions. [2022-07-13 18:12:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2022-07-13 18:12:33,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:33,484 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:12:33,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 18:12:33,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-13 18:12:33,700 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:33,701 INFO L85 PathProgramCache]: Analyzing trace with hash 29310338, now seen corresponding path program 1 times [2022-07-13 18:12:33,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:33,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79291215] [2022-07-13 18:12:33,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:33,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1223 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2022-07-13 18:12:33,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:33,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79291215] [2022-07-13 18:12:33,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79291215] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:12:33,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:12:33,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:12:33,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966301574] [2022-07-13 18:12:33,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:12:33,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:12:33,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:33,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:12:33,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:12:33,804 INFO L87 Difference]: Start difference. First operand 9398 states and 11964 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:34,261 INFO L93 Difference]: Finished difference Result 11457 states and 14333 transitions. [2022-07-13 18:12:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:12:34,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 573 [2022-07-13 18:12:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:34,265 INFO L225 Difference]: With dead ends: 11457 [2022-07-13 18:12:34,265 INFO L226 Difference]: Without dead ends: 2112 [2022-07-13 18:12:34,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:12:34,275 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 142 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:34,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 412 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:12:34,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2022-07-13 18:12:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 2109. [2022-07-13 18:12:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 2105 states have (on average 1.1087885985748218) internal successors, (2334), 2107 states have internal predecessors, (2334), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 2337 transitions. [2022-07-13 18:12:34,511 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 2337 transitions. Word has length 573 [2022-07-13 18:12:34,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:34,512 INFO L495 AbstractCegarLoop]: Abstraction has 2109 states and 2337 transitions. [2022-07-13 18:12:34,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 2337 transitions. [2022-07-13 18:12:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-07-13 18:12:34,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:34,516 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:12:34,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 18:12:34,517 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:34,517 INFO L85 PathProgramCache]: Analyzing trace with hash 61583050, now seen corresponding path program 1 times [2022-07-13 18:12:34,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:34,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460519308] [2022-07-13 18:12:34,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:34,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1223 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2022-07-13 18:12:34,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:34,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460519308] [2022-07-13 18:12:34,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460519308] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:12:34,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:12:34,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:12:34,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948282122] [2022-07-13 18:12:34,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:12:34,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:12:34,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:34,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:12:34,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:12:34,697 INFO L87 Difference]: Start difference. First operand 2109 states and 2337 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:35,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:35,169 INFO L93 Difference]: Finished difference Result 4316 states and 4827 transitions. [2022-07-13 18:12:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 18:12:35,170 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 574 [2022-07-13 18:12:35,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:35,195 INFO L225 Difference]: With dead ends: 4316 [2022-07-13 18:12:35,195 INFO L226 Difference]: Without dead ends: 3379 [2022-07-13 18:12:35,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-07-13 18:12:35,199 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 934 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 2554 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:35,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 2554 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:12:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3379 states. [2022-07-13 18:12:35,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3379 to 2101. [2022-07-13 18:12:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2097 states have (on average 1.1044349070100143) internal successors, (2316), 2099 states have internal predecessors, (2316), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 2319 transitions. [2022-07-13 18:12:35,461 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 2319 transitions. Word has length 574 [2022-07-13 18:12:35,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:35,462 INFO L495 AbstractCegarLoop]: Abstraction has 2101 states and 2319 transitions. [2022-07-13 18:12:35,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 2319 transitions. [2022-07-13 18:12:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-07-13 18:12:35,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:35,466 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:12:35,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-13 18:12:35,466 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:35,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:35,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1902632470, now seen corresponding path program 1 times [2022-07-13 18:12:35,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:35,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182966450] [2022-07-13 18:12:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:35,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2022-07-13 18:12:35,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:35,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182966450] [2022-07-13 18:12:35,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182966450] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:12:35,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:12:35,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:12:35,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747001595] [2022-07-13 18:12:35,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:12:35,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:12:35,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:35,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:12:35,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:12:35,639 INFO L87 Difference]: Start difference. First operand 2101 states and 2319 transitions. Second operand has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:36,041 INFO L93 Difference]: Finished difference Result 3602 states and 4006 transitions. [2022-07-13 18:12:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 18:12:36,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 575 [2022-07-13 18:12:36,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:36,046 INFO L225 Difference]: With dead ends: 3602 [2022-07-13 18:12:36,046 INFO L226 Difference]: Without dead ends: 2663 [2022-07-13 18:12:36,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:12:36,048 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 458 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:36,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 949 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:12:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2022-07-13 18:12:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 2030. [2022-07-13 18:12:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2027 states have (on average 1.0735076467686235) internal successors, (2176), 2028 states have internal predecessors, (2176), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 2178 transitions. [2022-07-13 18:12:36,286 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 2178 transitions. Word has length 575 [2022-07-13 18:12:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:36,298 INFO L495 AbstractCegarLoop]: Abstraction has 2030 states and 2178 transitions. [2022-07-13 18:12:36,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:36,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 2178 transitions. [2022-07-13 18:12:36,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2022-07-13 18:12:36,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:36,302 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:12:36,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-13 18:12:36,303 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:36,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:36,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1877942903, now seen corresponding path program 1 times [2022-07-13 18:12:36,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:36,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123629379] [2022-07-13 18:12:36,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:36,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 122 proven. 403 refuted. 0 times theorem prover too weak. 832 trivial. 0 not checked. [2022-07-13 18:12:36,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:36,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123629379] [2022-07-13 18:12:36,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123629379] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:36,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113323833] [2022-07-13 18:12:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:36,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:36,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:36,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:36,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 18:12:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:37,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-13 18:12:37,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:12:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 124 proven. 333 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-07-13 18:12:37,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:12:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1357 backedges. 30 proven. 427 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-07-13 18:12:38,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113323833] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:12:38,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:12:38,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2022-07-13 18:12:38,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489252832] [2022-07-13 18:12:38,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:12:38,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-13 18:12:38,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:38,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-13 18:12:38,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2022-07-13 18:12:38,748 INFO L87 Difference]: Start difference. First operand 2030 states and 2178 transitions. Second operand has 30 states, 30 states have (on average 13.966666666666667) internal successors, (419), 30 states have internal predecessors, (419), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:39,886 INFO L93 Difference]: Finished difference Result 2352 states and 2524 transitions. [2022-07-13 18:12:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-13 18:12:39,886 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 13.966666666666667) internal successors, (419), 30 states have internal predecessors, (419), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 631 [2022-07-13 18:12:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:39,890 INFO L225 Difference]: With dead ends: 2352 [2022-07-13 18:12:39,890 INFO L226 Difference]: Without dead ends: 2349 [2022-07-13 18:12:39,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1311 GetRequests, 1255 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=388, Invalid=2368, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 18:12:39,892 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 2509 mSDsluCounter, 7839 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2509 SdHoareTripleChecker+Valid, 8240 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:39,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2509 Valid, 8240 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 18:12:39,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2022-07-13 18:12:40,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2030. [2022-07-13 18:12:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2027 states have (on average 1.0730143068574247) internal successors, (2175), 2028 states have internal predecessors, (2175), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 2177 transitions. [2022-07-13 18:12:40,155 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 2177 transitions. Word has length 631 [2022-07-13 18:12:40,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:40,156 INFO L495 AbstractCegarLoop]: Abstraction has 2030 states and 2177 transitions. [2022-07-13 18:12:40,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.966666666666667) internal successors, (419), 30 states have internal predecessors, (419), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 2177 transitions. [2022-07-13 18:12:40,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 682 [2022-07-13 18:12:40,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:40,161 INFO L195 NwaCegarLoop]: trace histogram [13, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:12:40,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 18:12:40,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-13 18:12:40,381 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:40,381 INFO L85 PathProgramCache]: Analyzing trace with hash -659046380, now seen corresponding path program 1 times [2022-07-13 18:12:40,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:40,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559935187] [2022-07-13 18:12:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:40,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 352 proven. 48 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2022-07-13 18:12:40,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:40,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559935187] [2022-07-13 18:12:40,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559935187] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:40,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476407289] [2022-07-13 18:12:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:40,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:40,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:40,688 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:40,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 18:12:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:40,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 18:12:40,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:12:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 352 proven. 48 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2022-07-13 18:12:41,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:12:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1516 backedges. 352 proven. 48 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2022-07-13 18:12:41,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476407289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:12:41,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:12:41,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-07-13 18:12:41,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510422914] [2022-07-13 18:12:41,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:12:41,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 18:12:41,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:41,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 18:12:41,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-13 18:12:41,420 INFO L87 Difference]: Start difference. First operand 2030 states and 2177 transitions. Second operand has 9 states, 9 states have (on average 31.555555555555557) internal successors, (284), 9 states have internal predecessors, (284), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:41,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:41,983 INFO L93 Difference]: Finished difference Result 3425 states and 3680 transitions. [2022-07-13 18:12:41,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 18:12:41,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 31.555555555555557) internal successors, (284), 9 states have internal predecessors, (284), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 681 [2022-07-13 18:12:41,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:42,009 INFO L225 Difference]: With dead ends: 3425 [2022-07-13 18:12:42,010 INFO L226 Difference]: Without dead ends: 2739 [2022-07-13 18:12:42,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1388 GetRequests, 1367 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-07-13 18:12:42,015 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 1150 mSDsluCounter, 2931 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 3453 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:42,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1150 Valid, 3453 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:12:42,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2022-07-13 18:12:42,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 2024. [2022-07-13 18:12:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2021 states have (on average 1.0682830282038596) internal successors, (2159), 2022 states have internal predecessors, (2159), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:42,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 2161 transitions. [2022-07-13 18:12:42,360 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 2161 transitions. Word has length 681 [2022-07-13 18:12:42,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:42,361 INFO L495 AbstractCegarLoop]: Abstraction has 2024 states and 2161 transitions. [2022-07-13 18:12:42,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 31.555555555555557) internal successors, (284), 9 states have internal predecessors, (284), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:42,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 2161 transitions. [2022-07-13 18:12:42,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 740 [2022-07-13 18:12:42,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:42,366 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 18:12:42,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 18:12:42,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-13 18:12:42,579 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:42,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1976417087, now seen corresponding path program 1 times [2022-07-13 18:12:42,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:42,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108399781] [2022-07-13 18:12:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:42,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 232 proven. 1011 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2022-07-13 18:12:43,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:43,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108399781] [2022-07-13 18:12:43,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108399781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:43,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546532164] [2022-07-13 18:12:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:43,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:43,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:43,067 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:43,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 18:12:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:43,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 2010 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-13 18:12:43,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:12:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 319 proven. 870 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2022-07-13 18:12:44,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:12:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 35 proven. 1154 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2022-07-13 18:12:45,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546532164] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:12:45,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:12:45,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 34 [2022-07-13 18:12:45,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165343036] [2022-07-13 18:12:45,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:12:45,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 18:12:45,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:45,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 18:12:45,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 18:12:45,500 INFO L87 Difference]: Start difference. First operand 2024 states and 2161 transitions. Second operand has 34 states, 34 states have (on average 20.852941176470587) internal successors, (709), 34 states have internal predecessors, (709), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:46,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:46,819 INFO L93 Difference]: Finished difference Result 2277 states and 2431 transitions. [2022-07-13 18:12:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 18:12:46,819 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 20.852941176470587) internal successors, (709), 34 states have internal predecessors, (709), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 739 [2022-07-13 18:12:46,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:46,823 INFO L225 Difference]: With dead ends: 2277 [2022-07-13 18:12:46,823 INFO L226 Difference]: Without dead ends: 2274 [2022-07-13 18:12:46,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1541 GetRequests, 1475 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=447, Invalid=3585, Unknown=0, NotChecked=0, Total=4032 [2022-07-13 18:12:46,825 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 3267 mSDsluCounter, 12597 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3267 SdHoareTripleChecker+Valid, 13237 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:46,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3267 Valid, 13237 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 18:12:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2022-07-13 18:12:47,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 2024. [2022-07-13 18:12:47,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2021 states have (on average 1.0677882236516576) internal successors, (2158), 2022 states have internal predecessors, (2158), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 2160 transitions. [2022-07-13 18:12:47,115 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 2160 transitions. Word has length 739 [2022-07-13 18:12:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:47,116 INFO L495 AbstractCegarLoop]: Abstraction has 2024 states and 2160 transitions. [2022-07-13 18:12:47,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 20.852941176470587) internal successors, (709), 34 states have internal predecessors, (709), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:47,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 2160 transitions. [2022-07-13 18:12:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2022-07-13 18:12:47,121 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:47,121 INFO L195 NwaCegarLoop]: trace histogram [15, 10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-13 18:12:47,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 18:12:47,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:47,341 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:47,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:47,342 INFO L85 PathProgramCache]: Analyzing trace with hash -915433764, now seen corresponding path program 1 times [2022-07-13 18:12:47,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:47,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088808487] [2022-07-13 18:12:47,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:47,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 593 proven. 212 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2022-07-13 18:12:47,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:47,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088808487] [2022-07-13 18:12:47,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088808487] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:47,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382459658] [2022-07-13 18:12:47,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:47,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:47,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:47,701 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:47,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 18:12:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:47,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 2139 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 18:12:47,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:12:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 593 proven. 212 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2022-07-13 18:12:48,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:12:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 593 proven. 212 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2022-07-13 18:12:48,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382459658] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:12:48,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:12:48,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-07-13 18:12:48,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381115885] [2022-07-13 18:12:48,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:12:48,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 18:12:48,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:48,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 18:12:48,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-13 18:12:48,723 INFO L87 Difference]: Start difference. First operand 2024 states and 2160 transitions. Second operand has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:49,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:49,372 INFO L93 Difference]: Finished difference Result 3055 states and 3271 transitions. [2022-07-13 18:12:49,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 18:12:49,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 789 [2022-07-13 18:12:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:49,382 INFO L225 Difference]: With dead ends: 3055 [2022-07-13 18:12:49,390 INFO L226 Difference]: Without dead ends: 2563 [2022-07-13 18:12:49,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1611 GetRequests, 1584 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-07-13 18:12:49,396 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 1427 mSDsluCounter, 5155 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1427 SdHoareTripleChecker+Valid, 5861 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:49,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1427 Valid, 5861 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:12:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2022-07-13 18:12:49,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2020. [2022-07-13 18:12:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2017 states have (on average 1.0629647992067426) internal successors, (2144), 2018 states have internal predecessors, (2144), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:49,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 2146 transitions. [2022-07-13 18:12:49,669 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 2146 transitions. Word has length 789 [2022-07-13 18:12:49,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:49,670 INFO L495 AbstractCegarLoop]: Abstraction has 2020 states and 2146 transitions. [2022-07-13 18:12:49,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:49,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 2146 transitions. [2022-07-13 18:12:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2022-07-13 18:12:49,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:49,677 INFO L195 NwaCegarLoop]: trace histogram [16, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-13 18:12:49,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 18:12:49,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-13 18:12:49,892 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:49,893 INFO L85 PathProgramCache]: Analyzing trace with hash -564749760, now seen corresponding path program 1 times [2022-07-13 18:12:49,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:49,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413194043] [2022-07-13 18:12:49,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:49,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 189 proven. 1783 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-07-13 18:12:50,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:50,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413194043] [2022-07-13 18:12:50,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413194043] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:50,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060427396] [2022-07-13 18:12:50,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:50,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:50,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:50,547 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:50,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 18:12:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:50,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 2280 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-13 18:12:50,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:12:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 422 proven. 1514 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-13 18:12:52,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:12:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 40 proven. 1896 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-13 18:12:52,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060427396] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:12:52,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:12:52,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 40 [2022-07-13 18:12:52,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464738459] [2022-07-13 18:12:52,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:12:52,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-13 18:12:52,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:52,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-13 18:12:52,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 18:12:52,995 INFO L87 Difference]: Start difference. First operand 2020 states and 2146 transitions. Second operand has 40 states, 40 states have (on average 25.55) internal successors, (1022), 40 states have internal predecessors, (1022), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:54,342 INFO L93 Difference]: Finished difference Result 2283 states and 2426 transitions. [2022-07-13 18:12:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-13 18:12:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 25.55) internal successors, (1022), 40 states have internal predecessors, (1022), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 848 [2022-07-13 18:12:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:54,347 INFO L225 Difference]: With dead ends: 2283 [2022-07-13 18:12:54,347 INFO L226 Difference]: Without dead ends: 2280 [2022-07-13 18:12:54,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1773 GetRequests, 1694 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=519, Invalid=5181, Unknown=0, NotChecked=0, Total=5700 [2022-07-13 18:12:54,349 INFO L413 NwaCegarLoop]: 884 mSDtfsCounter, 3590 mSDsluCounter, 21317 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3590 SdHoareTripleChecker+Valid, 22201 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:54,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3590 Valid, 22201 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1589 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 18:12:54,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2022-07-13 18:12:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 2020. [2022-07-13 18:12:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2017 states have (on average 1.0624690133862171) internal successors, (2143), 2018 states have internal predecessors, (2143), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:54,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 2145 transitions. [2022-07-13 18:12:54,627 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 2145 transitions. Word has length 848 [2022-07-13 18:12:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:54,628 INFO L495 AbstractCegarLoop]: Abstraction has 2020 states and 2145 transitions. [2022-07-13 18:12:54,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 25.55) internal successors, (1022), 40 states have internal predecessors, (1022), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 2145 transitions. [2022-07-13 18:12:54,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 899 [2022-07-13 18:12:54,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:54,634 INFO L195 NwaCegarLoop]: trace histogram [17, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:12:54,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 18:12:54,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:54,839 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:54,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:54,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1919800221, now seen corresponding path program 1 times [2022-07-13 18:12:54,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:54,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430898592] [2022-07-13 18:12:54,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:54,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 834 proven. 493 refuted. 0 times theorem prover too weak. 1124 trivial. 0 not checked. [2022-07-13 18:12:55,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:55,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430898592] [2022-07-13 18:12:55,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430898592] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:55,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942027837] [2022-07-13 18:12:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:55,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:55,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:55,080 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:55,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 18:12:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:55,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 2409 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-13 18:12:55,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:12:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 834 proven. 493 refuted. 0 times theorem prover too weak. 1124 trivial. 0 not checked. [2022-07-13 18:12:55,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:12:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 834 proven. 493 refuted. 0 times theorem prover too weak. 1124 trivial. 0 not checked. [2022-07-13 18:12:56,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942027837] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:12:56,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:12:56,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2022-07-13 18:12:56,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848548746] [2022-07-13 18:12:56,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:12:56,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 18:12:56,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:12:56,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 18:12:56,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-07-13 18:12:56,577 INFO L87 Difference]: Start difference. First operand 2020 states and 2145 transitions. Second operand has 13 states, 13 states have (on average 38.23076923076923) internal successors, (497), 13 states have internal predecessors, (497), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:57,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:12:57,280 INFO L93 Difference]: Finished difference Result 2687 states and 2864 transitions. [2022-07-13 18:12:57,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 18:12:57,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 38.23076923076923) internal successors, (497), 13 states have internal predecessors, (497), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 898 [2022-07-13 18:12:57,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:12:57,283 INFO L225 Difference]: With dead ends: 2687 [2022-07-13 18:12:57,284 INFO L226 Difference]: Without dead ends: 2389 [2022-07-13 18:12:57,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1836 GetRequests, 1805 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-07-13 18:12:57,285 INFO L413 NwaCegarLoop]: 892 mSDtfsCounter, 1678 mSDsluCounter, 8170 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 9062 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 18:12:57,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1678 Valid, 9062 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 18:12:57,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2022-07-13 18:12:57,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2018. [2022-07-13 18:12:57,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2015 states have (on average 1.0575682382133995) internal successors, (2131), 2016 states have internal predecessors, (2131), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2133 transitions. [2022-07-13 18:12:57,564 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2133 transitions. Word has length 898 [2022-07-13 18:12:57,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:12:57,565 INFO L495 AbstractCegarLoop]: Abstraction has 2018 states and 2133 transitions. [2022-07-13 18:12:57,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.23076923076923) internal successors, (497), 13 states have internal predecessors, (497), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:12:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2133 transitions. [2022-07-13 18:12:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2022-07-13 18:12:57,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:12:57,573 INFO L195 NwaCegarLoop]: trace histogram [18, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:12:57,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 18:12:57,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:57,794 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:12:57,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:12:57,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1153982525, now seen corresponding path program 1 times [2022-07-13 18:12:57,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:12:57,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857934461] [2022-07-13 18:12:57,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:57,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:12:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 146 proven. 2564 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-13 18:12:58,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:12:58,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857934461] [2022-07-13 18:12:58,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857934461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:12:58,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954975578] [2022-07-13 18:12:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:12:58,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:12:58,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:12:58,664 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:12:58,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 18:12:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:12:59,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 2551 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-13 18:12:59,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:13:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 429 proven. 2263 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-13 18:13:00,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:13:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 45 proven. 2647 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-13 18:13:01,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954975578] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:13:01,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:13:01,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 46 [2022-07-13 18:13:01,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108281313] [2022-07-13 18:13:01,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:13:01,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-13 18:13:01,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:13:01,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-13 18:13:01,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1946, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 18:13:01,803 INFO L87 Difference]: Start difference. First operand 2018 states and 2133 transitions. Second operand has 46 states, 46 states have (on average 29.08695652173913) internal successors, (1338), 46 states have internal predecessors, (1338), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:13:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:13:03,817 INFO L93 Difference]: Finished difference Result 2291 states and 2423 transitions. [2022-07-13 18:13:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-13 18:13:03,818 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 29.08695652173913) internal successors, (1338), 46 states have internal predecessors, (1338), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 958 [2022-07-13 18:13:03,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:13:03,834 INFO L225 Difference]: With dead ends: 2291 [2022-07-13 18:13:03,837 INFO L226 Difference]: Without dead ends: 2288 [2022-07-13 18:13:03,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2006 GetRequests, 1916 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=580, Invalid=6902, Unknown=0, NotChecked=0, Total=7482 [2022-07-13 18:13:03,848 INFO L413 NwaCegarLoop]: 1130 mSDtfsCounter, 3626 mSDsluCounter, 34038 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3626 SdHoareTripleChecker+Valid, 35168 SdHoareTripleChecker+Invalid, 2442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 18:13:03,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3626 Valid, 35168 Invalid, 2442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2375 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 18:13:03,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2288 states. [2022-07-13 18:13:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2288 to 2018. [2022-07-13 18:13:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2015 states have (on average 1.0570719602977667) internal successors, (2130), 2016 states have internal predecessors, (2130), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:13:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2132 transitions. [2022-07-13 18:13:04,193 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2132 transitions. Word has length 958 [2022-07-13 18:13:04,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:13:04,193 INFO L495 AbstractCegarLoop]: Abstraction has 2018 states and 2132 transitions. [2022-07-13 18:13:04,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 29.08695652173913) internal successors, (1338), 46 states have internal predecessors, (1338), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:13:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2132 transitions. [2022-07-13 18:13:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1009 [2022-07-13 18:13:04,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:13:04,208 INFO L195 NwaCegarLoop]: trace histogram [19, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:13:04,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-13 18:13:04,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-13 18:13:04,427 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:13:04,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:13:04,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1126968736, now seen corresponding path program 1 times [2022-07-13 18:13:04,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:13:04,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005499679] [2022-07-13 18:13:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:13:04,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:13:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3095 backedges. 1075 proven. 892 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-07-13 18:13:04,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:13:04,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005499679] [2022-07-13 18:13:04,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005499679] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:13:04,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909835650] [2022-07-13 18:13:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:13:04,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:13:04,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:13:04,728 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:13:04,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 18:13:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:05,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 2680 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 18:13:05,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:13:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3095 backedges. 1075 proven. 892 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-07-13 18:13:05,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:13:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3095 backedges. 1075 proven. 892 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-07-13 18:13:06,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909835650] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:13:06,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:13:06,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2022-07-13 18:13:06,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200906223] [2022-07-13 18:13:06,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:13:06,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 18:13:06,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:13:06,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 18:13:06,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-07-13 18:13:06,417 INFO L87 Difference]: Start difference. First operand 2018 states and 2132 transitions. Second operand has 15 states, 15 states have (on average 40.333333333333336) internal successors, (605), 15 states have internal predecessors, (605), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:13:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:13:07,258 INFO L93 Difference]: Finished difference Result 2398 states and 2543 transitions. [2022-07-13 18:13:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 18:13:07,258 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 40.333333333333336) internal successors, (605), 15 states have internal predecessors, (605), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1008 [2022-07-13 18:13:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:13:07,262 INFO L225 Difference]: With dead ends: 2398 [2022-07-13 18:13:07,262 INFO L226 Difference]: Without dead ends: 2294 [2022-07-13 18:13:07,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2061 GetRequests, 2027 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-07-13 18:13:07,264 INFO L413 NwaCegarLoop]: 1031 mSDtfsCounter, 1767 mSDsluCounter, 11292 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1767 SdHoareTripleChecker+Valid, 12323 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 18:13:07,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1767 Valid, 12323 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 18:13:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2022-07-13 18:13:07,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2017. [2022-07-13 18:13:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2015 states have (on average 1.0521091811414391) internal successors, (2120), 2015 states have internal predecessors, (2120), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:13:07,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 2121 transitions. [2022-07-13 18:13:07,546 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 2121 transitions. Word has length 1008 [2022-07-13 18:13:07,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:13:07,547 INFO L495 AbstractCegarLoop]: Abstraction has 2017 states and 2121 transitions. [2022-07-13 18:13:07,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 40.333333333333336) internal successors, (605), 15 states have internal predecessors, (605), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:13:07,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 2121 transitions. [2022-07-13 18:13:07,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1070 [2022-07-13 18:13:07,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:13:07,555 INFO L195 NwaCegarLoop]: trace histogram [20, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:13:07,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 18:13:07,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:13:07,756 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:13:07,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:13:07,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1004803881, now seen corresponding path program 1 times [2022-07-13 18:13:07,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:13:07,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702567550] [2022-07-13 18:13:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:13:07,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:13:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3489 backedges. 103 proven. 3353 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 18:13:08,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:13:08,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702567550] [2022-07-13 18:13:08,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702567550] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:13:08,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456416049] [2022-07-13 18:13:08,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:13:08,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:13:08,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:13:08,397 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 18:13:08,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 18:13:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:08,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 2823 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-13 18:13:08,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:13:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3489 backedges. 340 proven. 3116 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 18:13:11,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:13:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3489 backedges. 50 proven. 3406 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 18:13:12,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456416049] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:13:12,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:13:12,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 52 [2022-07-13 18:13:12,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414678263] [2022-07-13 18:13:12,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:13:12,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-13 18:13:12,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:13:12,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-13 18:13:12,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2510, Unknown=0, NotChecked=0, Total=2652 [2022-07-13 18:13:12,623 INFO L87 Difference]: Start difference. First operand 2017 states and 2121 transitions. Second operand has 52 states, 52 states have (on average 30.98076923076923) internal successors, (1611), 52 states have internal predecessors, (1611), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:13:14,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:13:14,895 INFO L93 Difference]: Finished difference Result 2294 states and 2416 transitions. [2022-07-13 18:13:14,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-13 18:13:14,895 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 30.98076923076923) internal successors, (1611), 52 states have internal predecessors, (1611), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1069 [2022-07-13 18:13:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:13:14,896 INFO L225 Difference]: With dead ends: 2294 [2022-07-13 18:13:14,897 INFO L226 Difference]: Without dead ends: 0 [2022-07-13 18:13:14,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2255 GetRequests, 2145 SyntacticMatches, 6 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2633 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=778, Invalid=10352, Unknown=0, NotChecked=0, Total=11130 [2022-07-13 18:13:14,901 INFO L413 NwaCegarLoop]: 1302 mSDtfsCounter, 4766 mSDsluCounter, 44216 mSDsCounter, 0 mSdLazyCounter, 3007 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4766 SdHoareTripleChecker+Valid, 45518 SdHoareTripleChecker+Invalid, 3108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 18:13:14,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4766 Valid, 45518 Invalid, 3108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3007 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 18:13:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-13 18:13:14,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-13 18:13:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:13:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-13 18:13:14,902 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1069 [2022-07-13 18:13:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:13:14,902 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-13 18:13:14,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 30.98076923076923) internal successors, (1611), 52 states have internal predecessors, (1611), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:13:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-13 18:13:14,903 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-13 18:13:14,905 INFO L805 garLoopResultBuilder]: Registering result SAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 18:13:14,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 18:13:15,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:13:15,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-13 18:14:31,806 WARN L233 SmtUtils]: Spent 1.28m on a formula simplification. DAG size of input: 252 DAG size of output: 246 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)