./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label44+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/combinations/Problem05_label44+token_ring.03.cil-2.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 9a16e358cfe89c56ff212fd47034f5c1550027d42d4d56ed5c454e284a697aae --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 18:56:23,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 18:56:23,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 18:56:23,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 18:56:23,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 18:56:23,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 18:56:23,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 18:56:23,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 18:56:23,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 18:56:23,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 18:56:23,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 18:56:23,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 18:56:23,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 18:56:23,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 18:56:23,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 18:56:23,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 18:56:23,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 18:56:23,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 18:56:23,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 18:56:23,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 18:56:23,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 18:56:23,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 18:56:23,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 18:56:23,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 18:56:23,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 18:56:23,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 18:56:23,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 18:56:23,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 18:56:23,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 18:56:23,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 18:56:23,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 18:56:23,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 18:56:23,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 18:56:23,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 18:56:23,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 18:56:23,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 18:56:23,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 18:56:23,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 18:56:23,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 18:56:23,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 18:56:23,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 18:56:23,631 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 18:56:23,668 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 18:56:23,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 18:56:23,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 18:56:23,670 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 18:56:23,671 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 18:56:23,671 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 18:56:23,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 18:56:23,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 18:56:23,672 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 18:56:23,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 18:56:23,673 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 18:56:23,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 18:56:23,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 18:56:23,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 18:56:23,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 18:56:23,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 18:56:23,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 18:56:23,674 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 18:56:23,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 18:56:23,675 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 18:56:23,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 18:56:23,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 18:56:23,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 18:56:23,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 18:56:23,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 18:56:23,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 18:56:23,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 18:56:23,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 18:56:23,676 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 18:56:23,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 18:56:23,677 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 18:56:23,677 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 18:56:23,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 18:56:23,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 18:56:23,678 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a16e358cfe89c56ff212fd47034f5c1550027d42d4d56ed5c454e284a697aae [2021-12-17 18:56:23,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 18:56:23,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 18:56:23,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 18:56:23,939 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 18:56:23,940 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 18:56:23,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label44+token_ring.03.cil-2.c [2021-12-17 18:56:24,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562bcdc7e/adf78e06bbdc4c0ea551d9b29cfa34ba/FLAGd9b393c8f [2021-12-17 18:56:24,775 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 18:56:24,776 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label44+token_ring.03.cil-2.c [2021-12-17 18:56:24,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562bcdc7e/adf78e06bbdc4c0ea551d9b29cfa34ba/FLAGd9b393c8f [2021-12-17 18:56:25,303 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562bcdc7e/adf78e06bbdc4c0ea551d9b29cfa34ba [2021-12-17 18:56:25,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 18:56:25,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 18:56:25,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 18:56:25,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 18:56:25,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 18:56:25,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 06:56:25" (1/1) ... [2021-12-17 18:56:25,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d3f7d36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:56:25, skipping insertion in model container [2021-12-17 18:56:25,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 06:56:25" (1/1) ... [2021-12-17 18:56:25,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 18:56:25,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 18:56:27,039 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/combinations/Problem05_label44+token_ring.03.cil-2.c[377340,377353] [2021-12-17 18:56:27,065 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/combinations/Problem05_label44+token_ring.03.cil-2.c[383339,383352] [2021-12-17 18:56:27,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 18:56:27,219 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 18:56:27,975 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/combinations/Problem05_label44+token_ring.03.cil-2.c[377340,377353] [2021-12-17 18:56:27,983 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/combinations/Problem05_label44+token_ring.03.cil-2.c[383339,383352] [2021-12-17 18:56:28,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 18:56:28,053 INFO L208 MainTranslator]: Completed translation [2021-12-17 18:56:28,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:56:28 WrapperNode [2021-12-17 18:56:28,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 18:56:28,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 18:56:28,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 18:56:28,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 18:56:28,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:56:28" (1/1) ... [2021-12-17 18:56:28,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:56:28" (1/1) ... [2021-12-17 18:56:28,576 INFO L137 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12677 [2021-12-17 18:56:28,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 18:56:28,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 18:56:28,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 18:56:28,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 18:56:28,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:56:28" (1/1) ... [2021-12-17 18:56:28,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:56:28" (1/1) ... [2021-12-17 18:56:28,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:56:28" (1/1) ... [2021-12-17 18:56:28,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:56:28" (1/1) ... [2021-12-17 18:56:28,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:56:28" (1/1) ... [2021-12-17 18:56:28,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:56:28" (1/1) ... [2021-12-17 18:56:29,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:56:28" (1/1) ... [2021-12-17 18:56:29,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 18:56:29,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 18:56:29,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 18:56:29,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 18:56:29,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:56:28" (1/1) ... [2021-12-17 18:56:29,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 18:56:29,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:56:29,096 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) [2021-12-17 18:56:29,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 18:56:29,241 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-17 18:56:29,241 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-17 18:56:29,241 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 18:56:29,241 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 18:56:29,242 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-17 18:56:29,242 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-17 18:56:29,242 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-17 18:56:29,242 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-17 18:56:29,242 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-17 18:56:29,242 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-17 18:56:29,242 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-17 18:56:29,243 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-17 18:56:29,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 18:56:29,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 18:56:29,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 18:56:29,216 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 [2021-12-17 18:56:29,382 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 18:56:29,383 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 18:56:35,011 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 18:56:35,042 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 18:56:35,043 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-12-17 18:56:35,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 06:56:35 BoogieIcfgContainer [2021-12-17 18:56:35,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 18:56:35,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 18:56:35,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 18:56:35,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 18:56:35,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 06:56:25" (1/3) ... [2021-12-17 18:56:35,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46977a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 06:56:35, skipping insertion in model container [2021-12-17 18:56:35,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 06:56:28" (2/3) ... [2021-12-17 18:56:35,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46977a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 06:56:35, skipping insertion in model container [2021-12-17 18:56:35,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 06:56:35" (3/3) ... [2021-12-17 18:56:35,055 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label44+token_ring.03.cil-2.c [2021-12-17 18:56:35,059 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 18:56:35,060 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 18:56:35,114 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 18:56:35,121 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 18:56:35,122 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 18:56:35,173 INFO L276 IsEmpty]: Start isEmpty. Operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-17 18:56:35,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:56:35,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:56:35,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:56:35,187 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:56:35,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:56:35,192 INFO L85 PathProgramCache]: Analyzing trace with hash 200056068, now seen corresponding path program 1 times [2021-12-17 18:56:35,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:56:35,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124740193] [2021-12-17 18:56:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:35,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:56:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:35,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:56:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:35,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:56:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:35,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:56:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:35,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:56:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:35,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:56:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:56:35,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:56:35,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124740193] [2021-12-17 18:56:35,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124740193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:56:35,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:56:35,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 18:56:35,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712715110] [2021-12-17 18:56:35,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:56:35,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 18:56:35,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:56:35,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 18:56:35,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 18:56:35,562 INFO L87 Difference]: Start difference. First operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:56:36,695 INFO L93 Difference]: Finished difference Result 4899 states and 9012 transitions. [2021-12-17 18:56:36,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 18:56:36,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:56:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:56:36,727 INFO L225 Difference]: With dead ends: 4899 [2021-12-17 18:56:36,727 INFO L226 Difference]: Without dead ends: 2500 [2021-12-17 18:56:36,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 18:56:36,744 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4543 mSDsluCounter, 12503 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 16790 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 18:56:36,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 16790 Invalid, 747 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [80 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 18:56:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-12-17 18:56:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2415. [2021-12-17 18:56:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2371 states have (on average 1.8291859974694222) internal successors, (4337), 2374 states have internal predecessors, (4337), 29 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2021-12-17 18:56:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4398 transitions. [2021-12-17 18:56:36,889 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4398 transitions. Word has length 79 [2021-12-17 18:56:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:56:36,890 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 4398 transitions. [2021-12-17 18:56:36,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4398 transitions. [2021-12-17 18:56:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:56:36,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:56:36,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:56:36,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 18:56:36,895 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:56:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:56:36,899 INFO L85 PathProgramCache]: Analyzing trace with hash 437104264, now seen corresponding path program 1 times [2021-12-17 18:56:36,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:56:36,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745034366] [2021-12-17 18:56:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:36,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:56:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:37,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:56:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:37,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:56:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:37,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:56:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:37,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:56:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:37,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:56:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:56:37,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:56:37,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745034366] [2021-12-17 18:56:37,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745034366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:56:37,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:56:37,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:56:37,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708323258] [2021-12-17 18:56:37,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:56:37,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:56:37,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:56:37,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:56:37,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:56:37,151 INFO L87 Difference]: Start difference. First operand 2415 states and 4398 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:38,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:56:38,251 INFO L93 Difference]: Finished difference Result 2969 states and 5244 transitions. [2021-12-17 18:56:38,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:56:38,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:56:38,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:56:38,264 INFO L225 Difference]: With dead ends: 2969 [2021-12-17 18:56:38,265 INFO L226 Difference]: Without dead ends: 2686 [2021-12-17 18:56:38,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 18:56:38,272 INFO L933 BasicCegarLoop]: 4320 mSDtfsCounter, 4469 mSDsluCounter, 16595 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4479 SdHoareTripleChecker+Valid, 20915 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 18:56:38,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4479 Valid, 20915 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 18:56:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-12-17 18:56:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2548. [2021-12-17 18:56:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2485 states have (on average 1.8132796780684104) internal successors, (4506), 2489 states have internal predecessors, (4506), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2021-12-17 18:56:38,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 4593 transitions. [2021-12-17 18:56:38,365 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 4593 transitions. Word has length 79 [2021-12-17 18:56:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:56:38,366 INFO L470 AbstractCegarLoop]: Abstraction has 2548 states and 4593 transitions. [2021-12-17 18:56:38,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 4593 transitions. [2021-12-17 18:56:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:56:38,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:56:38,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:56:38,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 18:56:38,374 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:56:38,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:56:38,374 INFO L85 PathProgramCache]: Analyzing trace with hash 382711366, now seen corresponding path program 1 times [2021-12-17 18:56:38,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:56:38,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727444894] [2021-12-17 18:56:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:38,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:56:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:38,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:56:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:38,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:56:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:38,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:56:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:38,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:56:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:38,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:56:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:56:38,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:56:38,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727444894] [2021-12-17 18:56:38,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727444894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:56:38,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:56:38,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:56:38,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639938910] [2021-12-17 18:56:38,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:56:38,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:56:38,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:56:38,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:56:38,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:56:38,538 INFO L87 Difference]: Start difference. First operand 2548 states and 4593 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:39,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:56:39,582 INFO L93 Difference]: Finished difference Result 3451 states and 5967 transitions. [2021-12-17 18:56:39,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:56:39,583 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:56:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:56:39,596 INFO L225 Difference]: With dead ends: 3451 [2021-12-17 18:56:39,596 INFO L226 Difference]: Without dead ends: 3035 [2021-12-17 18:56:39,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 18:56:39,606 INFO L933 BasicCegarLoop]: 4312 mSDtfsCounter, 4466 mSDsluCounter, 16591 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4476 SdHoareTripleChecker+Valid, 20903 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 18:56:39,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4476 Valid, 20903 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 18:56:39,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2021-12-17 18:56:39,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 2815. [2021-12-17 18:56:39,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2714 states have (on average 1.7851879145173175) internal successors, (4845), 2720 states have internal predecessors, (4845), 65 states have call successors, (65), 30 states have call predecessors, (65), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2021-12-17 18:56:39,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 4988 transitions. [2021-12-17 18:56:39,689 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 4988 transitions. Word has length 79 [2021-12-17 18:56:39,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:56:39,690 INFO L470 AbstractCegarLoop]: Abstraction has 2815 states and 4988 transitions. [2021-12-17 18:56:39,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 4988 transitions. [2021-12-17 18:56:39,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:56:39,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:56:39,694 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:56:39,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 18:56:39,694 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:56:39,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:56:39,695 INFO L85 PathProgramCache]: Analyzing trace with hash -34685240, now seen corresponding path program 1 times [2021-12-17 18:56:39,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:56:39,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022495716] [2021-12-17 18:56:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:39,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:56:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:39,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:56:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:39,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:56:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:39,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:56:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:39,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:56:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:39,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:56:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:56:39,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:56:39,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022495716] [2021-12-17 18:56:39,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022495716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:56:39,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:56:39,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:56:39,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048851714] [2021-12-17 18:56:39,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:56:39,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:56:39,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:56:39,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:56:39,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:56:39,774 INFO L87 Difference]: Start difference. First operand 2815 states and 4988 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:40,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:56:40,841 INFO L93 Difference]: Finished difference Result 4382 states and 7362 transitions. [2021-12-17 18:56:40,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 18:56:40,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:56:40,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:56:40,857 INFO L225 Difference]: With dead ends: 4382 [2021-12-17 18:56:40,858 INFO L226 Difference]: Without dead ends: 3699 [2021-12-17 18:56:40,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 18:56:40,861 INFO L933 BasicCegarLoop]: 4308 mSDtfsCounter, 4462 mSDsluCounter, 16591 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4472 SdHoareTripleChecker+Valid, 20899 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 18:56:40,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4472 Valid, 20899 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 18:56:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2021-12-17 18:56:41,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 3350. [2021-12-17 18:56:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3173 states have (on average 1.7406240151276395) internal successors, (5523), 3183 states have internal predecessors, (5523), 113 states have call successors, (113), 54 states have call predecessors, (113), 62 states have return successors, (148), 120 states have call predecessors, (148), 113 states have call successors, (148) [2021-12-17 18:56:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 5784 transitions. [2021-12-17 18:56:41,056 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 5784 transitions. Word has length 79 [2021-12-17 18:56:41,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:56:41,056 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 5784 transitions. [2021-12-17 18:56:41,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:41,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 5784 transitions. [2021-12-17 18:56:41,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:56:41,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:56:41,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:56:41,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 18:56:41,065 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:56:41,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:56:41,065 INFO L85 PathProgramCache]: Analyzing trace with hash 644587014, now seen corresponding path program 1 times [2021-12-17 18:56:41,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:56:41,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632711880] [2021-12-17 18:56:41,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:41,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:56:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:41,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:56:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:41,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:56:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:41,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:56:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:41,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:56:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:41,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:56:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:56:41,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:56:41,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632711880] [2021-12-17 18:56:41,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632711880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:56:41,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:56:41,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:56:41,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087109101] [2021-12-17 18:56:41,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:56:41,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:56:41,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:56:41,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:56:41,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:56:41,185 INFO L87 Difference]: Start difference. First operand 3350 states and 5784 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:56:41,753 INFO L93 Difference]: Finished difference Result 4914 states and 8177 transitions. [2021-12-17 18:56:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 18:56:41,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:56:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:56:41,768 INFO L225 Difference]: With dead ends: 4914 [2021-12-17 18:56:41,769 INFO L226 Difference]: Without dead ends: 3696 [2021-12-17 18:56:41,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 18:56:41,773 INFO L933 BasicCegarLoop]: 4169 mSDtfsCounter, 4396 mSDsluCounter, 12153 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4407 SdHoareTripleChecker+Valid, 16322 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 18:56:41,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4407 Valid, 16322 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 18:56:41,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3696 states. [2021-12-17 18:56:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3696 to 3350. [2021-12-17 18:56:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3173 states have (on average 1.7377875827292784) internal successors, (5514), 3183 states have internal predecessors, (5514), 113 states have call successors, (113), 54 states have call predecessors, (113), 62 states have return successors, (148), 120 states have call predecessors, (148), 113 states have call successors, (148) [2021-12-17 18:56:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 5775 transitions. [2021-12-17 18:56:41,885 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 5775 transitions. Word has length 79 [2021-12-17 18:56:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:56:41,885 INFO L470 AbstractCegarLoop]: Abstraction has 3350 states and 5775 transitions. [2021-12-17 18:56:41,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 5775 transitions. [2021-12-17 18:56:41,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:56:41,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:56:41,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:56:41,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 18:56:41,888 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:56:41,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:56:41,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1688805624, now seen corresponding path program 1 times [2021-12-17 18:56:41,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:56:41,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767619833] [2021-12-17 18:56:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:41,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:56:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:41,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:56:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:41,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:56:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:41,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:56:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:41,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:56:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:41,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:56:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:56:41,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:56:41,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767619833] [2021-12-17 18:56:41,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767619833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:56:41,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:56:41,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:56:41,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595729092] [2021-12-17 18:56:41,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:56:41,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:56:41,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:56:41,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:56:41,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:56:41,978 INFO L87 Difference]: Start difference. First operand 3350 states and 5775 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:43,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:56:43,258 INFO L93 Difference]: Finished difference Result 6544 states and 10562 transitions. [2021-12-17 18:56:43,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 18:56:43,259 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:56:43,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:56:43,285 INFO L225 Difference]: With dead ends: 6544 [2021-12-17 18:56:43,286 INFO L226 Difference]: Without dead ends: 5326 [2021-12-17 18:56:43,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 18:56:43,293 INFO L933 BasicCegarLoop]: 4337 mSDtfsCounter, 4475 mSDsluCounter, 16580 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4484 SdHoareTripleChecker+Valid, 20917 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 18:56:43,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4484 Valid, 20917 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 18:56:43,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-12-17 18:56:43,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4369. [2021-12-17 18:56:43,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 4048 states have (on average 1.679100790513834) internal successors, (6797), 4066 states have internal predecessors, (6797), 201 states have call successors, (201), 102 states have call predecessors, (201), 118 states have return successors, (298), 216 states have call predecessors, (298), 201 states have call successors, (298) [2021-12-17 18:56:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 7296 transitions. [2021-12-17 18:56:43,472 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 7296 transitions. Word has length 79 [2021-12-17 18:56:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:56:43,472 INFO L470 AbstractCegarLoop]: Abstraction has 4369 states and 7296 transitions. [2021-12-17 18:56:43,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 7296 transitions. [2021-12-17 18:56:43,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:56:43,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:56:43,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:56:43,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 18:56:43,476 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:56:43,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:56:43,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1486981690, now seen corresponding path program 1 times [2021-12-17 18:56:43,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:56:43,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287437357] [2021-12-17 18:56:43,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:43,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:56:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:43,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:56:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:43,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:56:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:43,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:56:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:43,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:56:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:43,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:56:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:56:43,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:56:43,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287437357] [2021-12-17 18:56:43,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287437357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:56:43,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:56:43,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 18:56:43,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011513300] [2021-12-17 18:56:43,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:56:43,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 18:56:43,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:56:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 18:56:43,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 18:56:43,577 INFO L87 Difference]: Start difference. First operand 4369 states and 7296 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:56:44,696 INFO L93 Difference]: Finished difference Result 9937 states and 15669 transitions. [2021-12-17 18:56:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 18:56:44,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:56:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:56:44,733 INFO L225 Difference]: With dead ends: 9937 [2021-12-17 18:56:44,733 INFO L226 Difference]: Without dead ends: 7700 [2021-12-17 18:56:44,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 18:56:44,744 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4466 mSDsluCounter, 16583 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4480 SdHoareTripleChecker+Valid, 20870 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 18:56:44,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4480 Valid, 20870 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 18:56:44,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7700 states. [2021-12-17 18:56:44,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7700 to 6452. [2021-12-17 18:56:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6452 states, 5851 states have (on average 1.6169885489659888) internal successors, (9461), 5885 states have internal predecessors, (9461), 369 states have call successors, (369), 198 states have call predecessors, (369), 230 states have return successors, (644), 400 states have call predecessors, (644), 369 states have call successors, (644) [2021-12-17 18:56:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6452 states to 6452 states and 10474 transitions. [2021-12-17 18:56:44,994 INFO L78 Accepts]: Start accepts. Automaton has 6452 states and 10474 transitions. Word has length 79 [2021-12-17 18:56:44,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:56:44,996 INFO L470 AbstractCegarLoop]: Abstraction has 6452 states and 10474 transitions. [2021-12-17 18:56:44,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 6452 states and 10474 transitions. [2021-12-17 18:56:45,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 18:56:45,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:56:45,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:56:45,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 18:56:45,003 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:56:45,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:56:45,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1053252604, now seen corresponding path program 1 times [2021-12-17 18:56:45,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:56:45,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664653084] [2021-12-17 18:56:45,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:45,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:56:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:45,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:56:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:45,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:56:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:45,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:56:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:45,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:56:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:45,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:56:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 18:56:45,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:56:45,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664653084] [2021-12-17 18:56:45,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664653084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:56:45,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 18:56:45,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 18:56:45,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18744426] [2021-12-17 18:56:45,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:56:45,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 18:56:45,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:56:45,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 18:56:45,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 18:56:45,085 INFO L87 Difference]: Start difference. First operand 6452 states and 10474 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:46,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:56:46,069 INFO L93 Difference]: Finished difference Result 14451 states and 22576 transitions. [2021-12-17 18:56:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 18:56:46,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-12-17 18:56:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:56:46,109 INFO L225 Difference]: With dead ends: 14451 [2021-12-17 18:56:46,109 INFO L226 Difference]: Without dead ends: 10132 [2021-12-17 18:56:46,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 18:56:46,131 INFO L933 BasicCegarLoop]: 4386 mSDtfsCounter, 4626 mSDsluCounter, 12345 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4653 SdHoareTripleChecker+Valid, 16731 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 18:56:46,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4653 Valid, 16731 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 18:56:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10132 states. [2021-12-17 18:56:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10132 to 8642. [2021-12-17 18:56:46,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8642 states, 7726 states have (on average 1.572741392699974) internal successors, (12151), 7793 states have internal predecessors, (12151), 566 states have call successors, (566), 300 states have call predecessors, (566), 348 states have return successors, (923), 580 states have call predecessors, (923), 566 states have call successors, (923) [2021-12-17 18:56:46,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8642 states to 8642 states and 13640 transitions. [2021-12-17 18:56:46,481 INFO L78 Accepts]: Start accepts. Automaton has 8642 states and 13640 transitions. Word has length 79 [2021-12-17 18:56:46,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:56:46,482 INFO L470 AbstractCegarLoop]: Abstraction has 8642 states and 13640 transitions. [2021-12-17 18:56:46,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 18:56:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 8642 states and 13640 transitions. [2021-12-17 18:56:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 18:56:46,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:56:46,499 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 18:56:46,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 18:56:46,500 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:56:46,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:56:46,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1451529571, now seen corresponding path program 1 times [2021-12-17 18:56:46,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:56:46,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106471447] [2021-12-17 18:56:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:46,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:56:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:46,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:56:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:46,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:56:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:46,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:56:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:46,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:56:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:46,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:56:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:46,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:56:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:46,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:56:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:46,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 18:56:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:56:46,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:56:46,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106471447] [2021-12-17 18:56:46,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106471447] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:56:46,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133373847] [2021-12-17 18:56:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:46,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:56:46,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:56:46,640 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) [2021-12-17 18:56:46,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 18:56:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:46,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:56:46,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:56:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 18:56:46,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:56:46,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133373847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:56:46,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:56:46,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:56:46,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210661342] [2021-12-17 18:56:46,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:56:46,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:56:46,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:56:46,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:56:46,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:56:46,984 INFO L87 Difference]: Start difference. First operand 8642 states and 13640 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:56:47,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:56:47,425 INFO L93 Difference]: Finished difference Result 21481 states and 32916 transitions. [2021-12-17 18:56:47,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:56:47,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-12-17 18:56:47,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:56:47,489 INFO L225 Difference]: With dead ends: 21481 [2021-12-17 18:56:47,489 INFO L226 Difference]: Without dead ends: 14972 [2021-12-17 18:56:47,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:56:47,517 INFO L933 BasicCegarLoop]: 4191 mSDtfsCounter, 4135 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4135 SdHoareTripleChecker+Valid, 4388 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:56:47,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4135 Valid, 4388 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:56:47,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14972 states. [2021-12-17 18:56:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14972 to 14870. [2021-12-17 18:56:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14870 states, 13070 states have (on average 1.5247130833970926) internal successors, (19928), 13202 states have internal predecessors, (19928), 1102 states have call successors, (1102), 600 states have call predecessors, (1102), 696 states have return successors, (1785), 1099 states have call predecessors, (1785), 1102 states have call successors, (1785) [2021-12-17 18:56:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14870 states to 14870 states and 22815 transitions. [2021-12-17 18:56:47,997 INFO L78 Accepts]: Start accepts. Automaton has 14870 states and 22815 transitions. Word has length 128 [2021-12-17 18:56:47,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:56:47,998 INFO L470 AbstractCegarLoop]: Abstraction has 14870 states and 22815 transitions. [2021-12-17 18:56:47,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:56:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 14870 states and 22815 transitions. [2021-12-17 18:56:48,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 18:56:48,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:56:48,026 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 18:56:48,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 18:56:48,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:56:48,239 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:56:48,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:56:48,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1829435325, now seen corresponding path program 1 times [2021-12-17 18:56:48,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:56:48,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965650456] [2021-12-17 18:56:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:48,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:56:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:48,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:56:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:48,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:56:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:48,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:56:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:48,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:56:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:48,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:56:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:48,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:56:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:48,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:56:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:48,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 18:56:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:56:48,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:56:48,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965650456] [2021-12-17 18:56:48,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965650456] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:56:48,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091246686] [2021-12-17 18:56:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:48,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:56:48,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:56:48,352 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) [2021-12-17 18:56:48,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 18:56:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:48,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:56:48,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:56:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 18:56:48,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:56:48,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091246686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:56:48,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:56:48,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:56:48,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305020945] [2021-12-17 18:56:48,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:56:48,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:56:48,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:56:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:56:48,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:56:48,711 INFO L87 Difference]: Start difference. First operand 14870 states and 22815 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:56:49,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:56:49,403 INFO L93 Difference]: Finished difference Result 39843 states and 60157 transitions. [2021-12-17 18:56:49,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:56:49,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-12-17 18:56:49,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:56:49,507 INFO L225 Difference]: With dead ends: 39843 [2021-12-17 18:56:49,508 INFO L226 Difference]: Without dead ends: 27106 [2021-12-17 18:56:49,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:56:49,550 INFO L933 BasicCegarLoop]: 4191 mSDtfsCounter, 4129 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4129 SdHoareTripleChecker+Valid, 4388 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:56:49,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4129 Valid, 4388 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:56:49,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27106 states. [2021-12-17 18:56:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27106 to 26904. [2021-12-17 18:56:50,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26904 states, 23410 states have (on average 1.494404100811619) internal successors, (34984), 23672 states have internal predecessors, (34984), 2100 states have call successors, (2100), 1200 states have call predecessors, (2100), 1392 states have return successors, (3435), 2063 states have call predecessors, (3435), 2100 states have call successors, (3435) [2021-12-17 18:56:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26904 states to 26904 states and 40519 transitions. [2021-12-17 18:56:50,375 INFO L78 Accepts]: Start accepts. Automaton has 26904 states and 40519 transitions. Word has length 128 [2021-12-17 18:56:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:56:50,376 INFO L470 AbstractCegarLoop]: Abstraction has 26904 states and 40519 transitions. [2021-12-17 18:56:50,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 18:56:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 26904 states and 40519 transitions. [2021-12-17 18:56:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 18:56:50,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:56:50,426 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 18:56:50,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 18:56:50,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 18:56:50,651 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:56:50,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:56:50,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1038951203, now seen corresponding path program 1 times [2021-12-17 18:56:50,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:56:50,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844624413] [2021-12-17 18:56:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:50,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:56:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:50,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:56:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:50,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:56:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:50,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:56:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:50,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:56:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:50,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:56:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:50,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:56:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:50,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:56:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:50,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 18:56:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 18:56:50,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:56:50,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844624413] [2021-12-17 18:56:50,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844624413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:56:50,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133885730] [2021-12-17 18:56:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:50,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:56:50,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:56:50,758 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) [2021-12-17 18:56:50,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 18:56:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:51,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:56:51,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:56:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 18:56:51,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:56:51,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133885730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:56:51,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:56:51,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:56:51,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656693308] [2021-12-17 18:56:51,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:56:51,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:56:51,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:56:51,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:56:51,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:56:51,230 INFO L87 Difference]: Start difference. First operand 26904 states and 40519 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 18:56:52,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:56:52,441 INFO L93 Difference]: Finished difference Result 75433 states and 113453 transitions. [2021-12-17 18:56:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:56:52,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 128 [2021-12-17 18:56:52,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:56:52,838 INFO L225 Difference]: With dead ends: 75433 [2021-12-17 18:56:52,838 INFO L226 Difference]: Without dead ends: 50663 [2021-12-17 18:56:52,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:56:52,897 INFO L933 BasicCegarLoop]: 4380 mSDtfsCounter, 193 mSDsluCounter, 4179 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 8559 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:56:52,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 8559 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:56:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50663 states. [2021-12-17 18:56:54,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50663 to 50663. [2021-12-17 18:56:54,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50663 states, 43814 states have (on average 1.4695531108778017) internal successors, (64387), 44269 states have internal predecessors, (64387), 4063 states have call successors, (4063), 2400 states have call predecessors, (4063), 2784 states have return successors, (7494), 4057 states have call predecessors, (7494), 4063 states have call successors, (7494) [2021-12-17 18:56:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50663 states to 50663 states and 75944 transitions. [2021-12-17 18:56:54,850 INFO L78 Accepts]: Start accepts. Automaton has 50663 states and 75944 transitions. Word has length 128 [2021-12-17 18:56:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:56:54,851 INFO L470 AbstractCegarLoop]: Abstraction has 50663 states and 75944 transitions. [2021-12-17 18:56:54,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 18:56:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 50663 states and 75944 transitions. [2021-12-17 18:56:54,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 18:56:54,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:56:54,985 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:56:55,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 18:56:55,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:56:55,205 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:56:55,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:56:55,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1108291405, now seen corresponding path program 1 times [2021-12-17 18:56:55,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:56:55,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79446760] [2021-12-17 18:56:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:55,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:56:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:55,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:56:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:55,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:56:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:55,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:56:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:55,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:56:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:55,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:56:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:55,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 18:56:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:55,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:56:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:55,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-17 18:56:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:55,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:56:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:55,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-17 18:56:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 18:56:55,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:56:55,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79446760] [2021-12-17 18:56:55,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79446760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:56:55,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395789160] [2021-12-17 18:56:55,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:56:55,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:56:55,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:56:55,337 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) [2021-12-17 18:56:55,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 18:56:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:56:55,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:56:55,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:56:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 18:56:55,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:56:55,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395789160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:56:55,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:56:55,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-17 18:56:55,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759005471] [2021-12-17 18:56:55,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:56:55,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:56:55,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:56:55,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:56:55,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:56:55,766 INFO L87 Difference]: Start difference. First operand 50663 states and 75944 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 18:56:58,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:56:58,292 INFO L93 Difference]: Finished difference Result 145415 states and 218067 transitions. [2021-12-17 18:56:58,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:56:58,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2021-12-17 18:56:58,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:56:58,863 INFO L225 Difference]: With dead ends: 145415 [2021-12-17 18:56:58,864 INFO L226 Difference]: Without dead ends: 96891 [2021-12-17 18:56:58,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:56:58,993 INFO L933 BasicCegarLoop]: 4200 mSDtfsCounter, 4085 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4085 SdHoareTripleChecker+Valid, 4397 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:56:58,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4085 Valid, 4397 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:56:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96891 states. [2021-12-17 18:57:02,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96891 to 96089. [2021-12-17 18:57:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96089 states, 82996 states have (on average 1.4590703166417658) internal successors, (121097), 83903 states have internal predecessors, (121097), 7621 states have call successors, (7621), 4702 states have call predecessors, (7621), 5470 states have return successors, (14146), 7547 states have call predecessors, (14146), 7621 states have call successors, (14146) [2021-12-17 18:57:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96089 states to 96089 states and 142864 transitions. [2021-12-17 18:57:02,848 INFO L78 Accepts]: Start accepts. Automaton has 96089 states and 142864 transitions. Word has length 166 [2021-12-17 18:57:02,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:57:02,848 INFO L470 AbstractCegarLoop]: Abstraction has 96089 states and 142864 transitions. [2021-12-17 18:57:02,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 18:57:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 96089 states and 142864 transitions. [2021-12-17 18:57:03,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 18:57:03,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:57:03,180 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:57:03,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 18:57:03,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:57:03,395 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:57:03,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:57:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash 399987983, now seen corresponding path program 1 times [2021-12-17 18:57:03,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:57:03,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277373577] [2021-12-17 18:57:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:57:03,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:57:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:03,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:57:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:03,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:57:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:03,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:57:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:03,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:57:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:03,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:57:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:03,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 18:57:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:03,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 18:57:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:03,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:57:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:03,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 18:57:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:03,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:57:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:03,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 18:57:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-17 18:57:03,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:57:03,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277373577] [2021-12-17 18:57:03,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277373577] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:57:03,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311382319] [2021-12-17 18:57:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:57:03,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:57:03,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:57:03,546 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) [2021-12-17 18:57:03,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 18:57:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:03,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 18:57:03,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:57:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 18:57:04,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:57:04,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311382319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:57:04,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:57:04,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:57:04,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044580524] [2021-12-17 18:57:04,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:57:04,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:57:04,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:57:04,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:57:04,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:57:04,023 INFO L87 Difference]: Start difference. First operand 96089 states and 142864 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 18:57:07,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:57:07,446 INFO L93 Difference]: Finished difference Result 202199 states and 303485 transitions. [2021-12-17 18:57:07,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:57:07,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 184 [2021-12-17 18:57:07,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:57:07,874 INFO L225 Difference]: With dead ends: 202199 [2021-12-17 18:57:07,874 INFO L226 Difference]: Without dead ends: 108251 [2021-12-17 18:57:08,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:57:08,057 INFO L933 BasicCegarLoop]: 4178 mSDtfsCounter, 4108 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4108 SdHoareTripleChecker+Valid, 4222 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:57:08,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4108 Valid, 4222 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:57:08,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108251 states. [2021-12-17 18:57:11,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108251 to 108251. [2021-12-17 18:57:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108251 states, 94154 states have (on average 1.4208105869108056) internal successors, (133775), 95061 states have internal predecessors, (133775), 7923 states have call successors, (7923), 5404 states have call predecessors, (7923), 6172 states have return successors, (14574), 7849 states have call predecessors, (14574), 7923 states have call successors, (14574) [2021-12-17 18:57:12,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108251 states to 108251 states and 156272 transitions. [2021-12-17 18:57:12,299 INFO L78 Accepts]: Start accepts. Automaton has 108251 states and 156272 transitions. Word has length 184 [2021-12-17 18:57:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 18:57:12,300 INFO L470 AbstractCegarLoop]: Abstraction has 108251 states and 156272 transitions. [2021-12-17 18:57:12,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 18:57:12,300 INFO L276 IsEmpty]: Start isEmpty. Operand 108251 states and 156272 transitions. [2021-12-17 18:57:12,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 18:57:12,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 18:57:12,781 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 18:57:12,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 18:57:13,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 18:57:13,004 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 18:57:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 18:57:13,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1248051052, now seen corresponding path program 1 times [2021-12-17 18:57:13,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 18:57:13,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304610597] [2021-12-17 18:57:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:57:13,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 18:57:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:13,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 18:57:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:13,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 18:57:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:13,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 18:57:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:13,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 18:57:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:13,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 18:57:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:13,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 18:57:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:13,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 18:57:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:13,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:57:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:13,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-17 18:57:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:13,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-17 18:57:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:13,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-17 18:57:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-17 18:57:13,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 18:57:13,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304610597] [2021-12-17 18:57:13,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304610597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 18:57:13,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114488170] [2021-12-17 18:57:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 18:57:13,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 18:57:13,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 18:57:13,132 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) [2021-12-17 18:57:13,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 18:57:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 18:57:13,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 18:57:13,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 18:57:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 18:57:13,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 18:57:13,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114488170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 18:57:13,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 18:57:13,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-17 18:57:13,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307294243] [2021-12-17 18:57:13,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 18:57:13,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 18:57:13,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 18:57:13,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 18:57:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:57:13,491 INFO L87 Difference]: Start difference. First operand 108251 states and 156272 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-17 18:57:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 18:57:17,017 INFO L93 Difference]: Finished difference Result 187531 states and 268805 transitions. [2021-12-17 18:57:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 18:57:17,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 184 [2021-12-17 18:57:17,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 18:57:17,568 INFO L225 Difference]: With dead ends: 187531 [2021-12-17 18:57:17,569 INFO L226 Difference]: Without dead ends: 115519 [2021-12-17 18:57:17,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 18:57:17,707 INFO L933 BasicCegarLoop]: 4201 mSDtfsCounter, 4120 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4120 SdHoareTripleChecker+Valid, 4408 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 18:57:17,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4120 Valid, 4408 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 18:57:17,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115519 states.