./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label37.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/eca-rers2012/Problem12_label37.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 216d354bd2b39cc08159a7e1d05b12b6bb34b7a88f8458e31e862be3f2691415 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:40:00,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:40:00,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:40:00,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:40:00,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:40:00,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:40:00,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:40:00,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:40:00,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:40:00,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:40:00,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:40:00,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:40:00,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:40:00,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:40:00,594 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:40:00,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:40:00,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:40:00,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:40:00,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:40:00,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:40:00,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:40:00,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:40:00,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:40:00,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:40:00,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:40:00,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:40:00,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:40:00,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:40:00,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:40:00,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:40:00,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:40:00,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:40:00,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:40:00,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:40:00,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:40:00,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:40:00,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:40:00,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:40:00,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:40:00,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:40:00,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:40:00,621 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:40:00,657 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:40:00,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:40:00,658 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:40:00,658 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:40:00,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:40:00,659 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:40:00,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:40:00,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:40:00,659 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:40:00,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:40:00,660 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:40:00,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:40:00,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:40:00,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:40:00,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:40:00,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:40:00,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:40:00,661 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:40:00,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:40:00,661 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:40:00,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:40:00,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:40:00,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:40:00,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:40:00,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:40:00,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:40:00,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:40:00,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:40:00,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:40:00,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:40:00,663 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:40:00,663 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:40:00,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:40:00,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:40:00,663 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 216d354bd2b39cc08159a7e1d05b12b6bb34b7a88f8458e31e862be3f2691415 [2021-12-15 09:40:00,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:40:00,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:40:00,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:40:00,890 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:40:00,891 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:40:00,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label37.c [2021-12-15 09:40:00,945 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19b5388f0/d7ff9f7257dd4bd28ce7bb13d6136e87/FLAG91d79f5ab [2021-12-15 09:40:01,480 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:40:01,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label37.c [2021-12-15 09:40:01,511 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19b5388f0/d7ff9f7257dd4bd28ce7bb13d6136e87/FLAG91d79f5ab [2021-12-15 09:40:01,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19b5388f0/d7ff9f7257dd4bd28ce7bb13d6136e87 [2021-12-15 09:40:01,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:40:01,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:40:01,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:40:01,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:40:01,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:40:01,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:40:01" (1/1) ... [2021-12-15 09:40:01,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58b7bacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:01, skipping insertion in model container [2021-12-15 09:40:01,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:40:01" (1/1) ... [2021-12-15 09:40:01,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:40:02,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:40:02,160 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/eca-rers2012/Problem12_label37.c[2005,2018] [2021-12-15 09:40:02,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:40:02,696 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:40:02,718 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/eca-rers2012/Problem12_label37.c[2005,2018] [2021-12-15 09:40:03,018 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:40:03,033 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:40:03,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:03 WrapperNode [2021-12-15 09:40:03,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:40:03,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:40:03,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:40:03,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:40:03,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:03" (1/1) ... [2021-12-15 09:40:03,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:03" (1/1) ... [2021-12-15 09:40:03,317 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-15 09:40:03,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:40:03,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:40:03,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:40:03,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:40:03,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:03" (1/1) ... [2021-12-15 09:40:03,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:03" (1/1) ... [2021-12-15 09:40:03,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:03" (1/1) ... [2021-12-15 09:40:03,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:03" (1/1) ... [2021-12-15 09:40:03,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:03" (1/1) ... [2021-12-15 09:40:03,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:03" (1/1) ... [2021-12-15 09:40:03,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:03" (1/1) ... [2021-12-15 09:40:03,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:40:03,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:40:03,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:40:03,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:40:03,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:03" (1/1) ... [2021-12-15 09:40:03,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:40:03,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:40:03,709 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) [2021-12-15 09:40:03,754 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 [2021-12-15 09:40:03,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:40:03,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:40:03,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:40:03,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:40:03,858 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:40:03,859 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:40:06,533 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:40:06,544 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:40:06,547 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:40:06,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:40:06 BoogieIcfgContainer [2021-12-15 09:40:06,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:40:06,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:40:06,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:40:06,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:40:06,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:40:01" (1/3) ... [2021-12-15 09:40:06,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b86478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:40:06, skipping insertion in model container [2021-12-15 09:40:06,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:03" (2/3) ... [2021-12-15 09:40:06,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b86478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:40:06, skipping insertion in model container [2021-12-15 09:40:06,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:40:06" (3/3) ... [2021-12-15 09:40:06,558 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label37.c [2021-12-15 09:40:06,562 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:40:06,562 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:40:06,607 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:40:06,614 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 [2021-12-15 09:40:06,614 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:40:06,674 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 09:40:06,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:06,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:06,679 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:06,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:06,684 INFO L85 PathProgramCache]: Analyzing trace with hash -461255479, now seen corresponding path program 1 times [2021-12-15 09:40:06,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:06,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273876979] [2021-12-15 09:40:06,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:06,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:40:06,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:06,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273876979] [2021-12-15 09:40:06,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273876979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:06,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:06,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:40:06,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612812943] [2021-12-15 09:40:06,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:06,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:06,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:06,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:06,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:06,822 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:09,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:09,674 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-12-15 09:40:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:09,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 09:40:09,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:09,700 INFO L225 Difference]: With dead ends: 2388 [2021-12-15 09:40:09,700 INFO L226 Difference]: Without dead ends: 1506 [2021-12-15 09:40:09,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:09,711 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 821 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:09,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 481 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:40:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-15 09:40:09,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-15 09:40:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6385382059800664) internal successors, (2466), 1505 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2466 transitions. [2021-12-15 09:40:09,790 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2466 transitions. Word has length 13 [2021-12-15 09:40:09,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:09,790 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2466 transitions. [2021-12-15 09:40:09,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:09,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2466 transitions. [2021-12-15 09:40:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-15 09:40:09,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:09,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:09,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:40:09,794 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:09,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:09,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2103331323, now seen corresponding path program 1 times [2021-12-15 09:40:09,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:09,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052324711] [2021-12-15 09:40:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:09,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:40:09,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:09,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052324711] [2021-12-15 09:40:09,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052324711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:09,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:09,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:09,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385145397] [2021-12-15 09:40:09,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:09,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:09,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:09,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:09,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:09,920 INFO L87 Difference]: Start difference. First operand 1506 states and 2466 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:12,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:12,591 INFO L93 Difference]: Finished difference Result 4512 states and 7393 transitions. [2021-12-15 09:40:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:12,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-15 09:40:12,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:12,600 INFO L225 Difference]: With dead ends: 4512 [2021-12-15 09:40:12,601 INFO L226 Difference]: Without dead ends: 3008 [2021-12-15 09:40:12,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:12,603 INFO L933 BasicCegarLoop]: 1149 mSDtfsCounter, 755 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:12,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 1157 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:40:12,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-12-15 09:40:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2021-12-15 09:40:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.537080146325241) internal successors, (4622), 3007 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:12,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4622 transitions. [2021-12-15 09:40:12,643 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4622 transitions. Word has length 84 [2021-12-15 09:40:12,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:12,644 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4622 transitions. [2021-12-15 09:40:12,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:12,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4622 transitions. [2021-12-15 09:40:12,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-15 09:40:12,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:12,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:12,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:40:12,646 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:12,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:12,647 INFO L85 PathProgramCache]: Analyzing trace with hash -649990971, now seen corresponding path program 1 times [2021-12-15 09:40:12,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:12,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925544347] [2021-12-15 09:40:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:12,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:40:12,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:12,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925544347] [2021-12-15 09:40:12,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925544347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:12,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:12,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:40:12,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246258440] [2021-12-15 09:40:12,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:12,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:12,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:12,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:12,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:12,712 INFO L87 Difference]: Start difference. First operand 3008 states and 4622 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:15,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:15,144 INFO L93 Difference]: Finished difference Result 9020 states and 13862 transitions. [2021-12-15 09:40:15,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:15,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-15 09:40:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:15,166 INFO L225 Difference]: With dead ends: 9020 [2021-12-15 09:40:15,166 INFO L226 Difference]: Without dead ends: 6014 [2021-12-15 09:40:15,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:15,177 INFO L933 BasicCegarLoop]: 493 mSDtfsCounter, 727 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:15,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 500 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2272 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:40:15,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6014 states. [2021-12-15 09:40:15,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6014 to 6012. [2021-12-15 09:40:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 1.3646647812344035) internal successors, (8203), 6011 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 8203 transitions. [2021-12-15 09:40:15,268 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 8203 transitions. Word has length 87 [2021-12-15 09:40:15,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:15,268 INFO L470 AbstractCegarLoop]: Abstraction has 6012 states and 8203 transitions. [2021-12-15 09:40:15,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 8203 transitions. [2021-12-15 09:40:15,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-15 09:40:15,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:15,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:15,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:40:15,274 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:15,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:15,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1408796741, now seen corresponding path program 1 times [2021-12-15 09:40:15,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:15,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084384289] [2021-12-15 09:40:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:15,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:40:15,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:15,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084384289] [2021-12-15 09:40:15,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084384289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:15,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:15,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:15,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714482853] [2021-12-15 09:40:15,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:15,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:40:15,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:15,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:40:15,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:40:15,426 INFO L87 Difference]: Start difference. First operand 6012 states and 8203 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:17,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:17,617 INFO L93 Difference]: Finished difference Result 12802 states and 17274 transitions. [2021-12-15 09:40:17,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 09:40:17,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-15 09:40:17,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:17,645 INFO L225 Difference]: With dead ends: 12802 [2021-12-15 09:40:17,645 INFO L226 Difference]: Without dead ends: 6792 [2021-12-15 09:40:17,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:40:17,653 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 1361 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:17,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 1645 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 09:40:17,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6792 states. [2021-12-15 09:40:17,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6792 to 6763. [2021-12-15 09:40:17,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.3250517598343685) internal successors, (8960), 6762 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 8960 transitions. [2021-12-15 09:40:17,742 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 8960 transitions. Word has length 88 [2021-12-15 09:40:17,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:17,742 INFO L470 AbstractCegarLoop]: Abstraction has 6763 states and 8960 transitions. [2021-12-15 09:40:17,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:17,743 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 8960 transitions. [2021-12-15 09:40:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-15 09:40:17,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:17,745 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:17,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:40:17,746 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:17,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:17,746 INFO L85 PathProgramCache]: Analyzing trace with hash -231950488, now seen corresponding path program 1 times [2021-12-15 09:40:17,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:17,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732892992] [2021-12-15 09:40:17,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:17,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:40:17,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:17,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732892992] [2021-12-15 09:40:17,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732892992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:17,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:17,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:17,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087153700] [2021-12-15 09:40:17,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:17,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:40:17,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:17,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:40:17,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:40:17,830 INFO L87 Difference]: Start difference. First operand 6763 states and 8960 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:20,334 INFO L93 Difference]: Finished difference Result 15816 states and 20780 transitions. [2021-12-15 09:40:20,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:40:20,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2021-12-15 09:40:20,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:20,377 INFO L225 Difference]: With dead ends: 15816 [2021-12-15 09:40:20,377 INFO L226 Difference]: Without dead ends: 9769 [2021-12-15 09:40:20,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:40:20,385 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 706 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3109 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 3381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 3109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:20,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 710 Invalid, 3381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 3109 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:40:20,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9769 states. [2021-12-15 09:40:20,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9769 to 9767. [2021-12-15 09:40:20,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.2348965799713292) internal successors, (12060), 9766 states have internal predecessors, (12060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:20,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12060 transitions. [2021-12-15 09:40:20,506 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12060 transitions. Word has length 152 [2021-12-15 09:40:20,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:20,507 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12060 transitions. [2021-12-15 09:40:20,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:20,510 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12060 transitions. [2021-12-15 09:40:20,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-15 09:40:20,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:20,512 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:20,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:40:20,513 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:20,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:20,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1817766086, now seen corresponding path program 1 times [2021-12-15 09:40:20,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:20,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891918693] [2021-12-15 09:40:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:20,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-15 09:40:20,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:20,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891918693] [2021-12-15 09:40:20,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891918693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:20,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:20,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:40:20,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609647957] [2021-12-15 09:40:20,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:20,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:20,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:20,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:20,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:20,625 INFO L87 Difference]: Start difference. First operand 9767 states and 12060 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:22,905 INFO L93 Difference]: Finished difference Result 26291 states and 33067 transitions. [2021-12-15 09:40:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:22,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2021-12-15 09:40:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:22,934 INFO L225 Difference]: With dead ends: 26291 [2021-12-15 09:40:22,934 INFO L226 Difference]: Without dead ends: 17277 [2021-12-15 09:40:22,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:22,945 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 697 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:22,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 427 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:40:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17277 states. [2021-12-15 09:40:23,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17277 to 17277. [2021-12-15 09:40:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17277 states, 17276 states have (on average 1.1782820097244733) internal successors, (20356), 17276 states have internal predecessors, (20356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:23,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17277 states to 17277 states and 20356 transitions. [2021-12-15 09:40:23,142 INFO L78 Accepts]: Start accepts. Automaton has 17277 states and 20356 transitions. Word has length 228 [2021-12-15 09:40:23,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:23,143 INFO L470 AbstractCegarLoop]: Abstraction has 17277 states and 20356 transitions. [2021-12-15 09:40:23,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:23,143 INFO L276 IsEmpty]: Start isEmpty. Operand 17277 states and 20356 transitions. [2021-12-15 09:40:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-15 09:40:23,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:23,145 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:23,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:40:23,145 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:23,146 INFO L85 PathProgramCache]: Analyzing trace with hash 654491795, now seen corresponding path program 1 times [2021-12-15 09:40:23,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:23,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114288318] [2021-12-15 09:40:23,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:23,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-15 09:40:23,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:23,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114288318] [2021-12-15 09:40:23,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114288318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:23,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:23,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:40:23,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478374649] [2021-12-15 09:40:23,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:23,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:23,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:23,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:23,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:23,260 INFO L87 Difference]: Start difference. First operand 17277 states and 20356 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:25,713 INFO L93 Difference]: Finished difference Result 45068 states and 54029 transitions. [2021-12-15 09:40:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:25,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 235 [2021-12-15 09:40:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:25,765 INFO L225 Difference]: With dead ends: 45068 [2021-12-15 09:40:25,766 INFO L226 Difference]: Without dead ends: 28544 [2021-12-15 09:40:25,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:25,780 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:25,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 310 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:40:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28544 states. [2021-12-15 09:40:26,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28544 to 27791. [2021-12-15 09:40:26,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27791 states, 27790 states have (on average 1.1578265563152212) internal successors, (32176), 27790 states have internal predecessors, (32176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27791 states to 27791 states and 32176 transitions. [2021-12-15 09:40:26,096 INFO L78 Accepts]: Start accepts. Automaton has 27791 states and 32176 transitions. Word has length 235 [2021-12-15 09:40:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:26,096 INFO L470 AbstractCegarLoop]: Abstraction has 27791 states and 32176 transitions. [2021-12-15 09:40:26,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:26,097 INFO L276 IsEmpty]: Start isEmpty. Operand 27791 states and 32176 transitions. [2021-12-15 09:40:26,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-15 09:40:26,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:26,099 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:26,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:40:26,099 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:26,100 INFO L85 PathProgramCache]: Analyzing trace with hash 69762660, now seen corresponding path program 1 times [2021-12-15 09:40:26,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:26,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665851069] [2021-12-15 09:40:26,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:26,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:40:26,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:26,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665851069] [2021-12-15 09:40:26,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665851069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:26,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:26,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:26,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082785783] [2021-12-15 09:40:26,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:26,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:26,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:26,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:26,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:26,174 INFO L87 Difference]: Start difference. First operand 27791 states and 32176 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:28,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:28,788 INFO L93 Difference]: Finished difference Result 67596 states and 78937 transitions. [2021-12-15 09:40:28,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:28,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 240 [2021-12-15 09:40:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:28,850 INFO L225 Difference]: With dead ends: 67596 [2021-12-15 09:40:28,850 INFO L226 Difference]: Without dead ends: 40558 [2021-12-15 09:40:28,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:28,868 INFO L933 BasicCegarLoop]: 1316 mSDtfsCounter, 678 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 3066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:28,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 1323 Invalid, 3066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 2692 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:40:28,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40558 states. [2021-12-15 09:40:29,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40558 to 39056. [2021-12-15 09:40:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39056 states, 39055 states have (on average 1.1573422097042632) internal successors, (45200), 39055 states have internal predecessors, (45200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39056 states to 39056 states and 45200 transitions. [2021-12-15 09:40:29,268 INFO L78 Accepts]: Start accepts. Automaton has 39056 states and 45200 transitions. Word has length 240 [2021-12-15 09:40:29,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:29,269 INFO L470 AbstractCegarLoop]: Abstraction has 39056 states and 45200 transitions. [2021-12-15 09:40:29,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:29,270 INFO L276 IsEmpty]: Start isEmpty. Operand 39056 states and 45200 transitions. [2021-12-15 09:40:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-15 09:40:29,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:29,274 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:29,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:40:29,276 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:29,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:29,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1739309358, now seen corresponding path program 1 times [2021-12-15 09:40:29,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:29,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5735066] [2021-12-15 09:40:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:29,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:40:29,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:29,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5735066] [2021-12-15 09:40:29,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5735066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:40:29,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841637679] [2021-12-15 09:40:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:29,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:40:29,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:40:29,391 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) [2021-12-15 09:40:29,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:40:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:29,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:40:29,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:40:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-15 09:40:29,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:40:29,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841637679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:29,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:40:29,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 09:40:29,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422829383] [2021-12-15 09:40:29,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:29,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:29,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:29,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:29,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:40:29,780 INFO L87 Difference]: Start difference. First operand 39056 states and 45200 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:32,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:32,521 INFO L93 Difference]: Finished difference Result 93130 states and 109471 transitions. [2021-12-15 09:40:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:32,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2021-12-15 09:40:32,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:32,611 INFO L225 Difference]: With dead ends: 93130 [2021-12-15 09:40:32,611 INFO L226 Difference]: Without dead ends: 54827 [2021-12-15 09:40:32,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:40:32,642 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 818 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2275 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 2275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:32,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 892 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [779 Valid, 2275 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:40:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54827 states. [2021-12-15 09:40:33,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54827 to 53325. [2021-12-15 09:40:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53325 states, 53324 states have (on average 1.1793751406496136) internal successors, (62889), 53324 states have internal predecessors, (62889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53325 states to 53325 states and 62889 transitions. [2021-12-15 09:40:33,321 INFO L78 Accepts]: Start accepts. Automaton has 53325 states and 62889 transitions. Word has length 244 [2021-12-15 09:40:33,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:33,322 INFO L470 AbstractCegarLoop]: Abstraction has 53325 states and 62889 transitions. [2021-12-15 09:40:33,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:33,322 INFO L276 IsEmpty]: Start isEmpty. Operand 53325 states and 62889 transitions. [2021-12-15 09:40:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-12-15 09:40:33,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:33,324 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:40:33,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:40:33,539 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 [2021-12-15 09:40:33,540 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:33,540 INFO L85 PathProgramCache]: Analyzing trace with hash -518830816, now seen corresponding path program 1 times [2021-12-15 09:40:33,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:33,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632725429] [2021-12-15 09:40:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:33,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-15 09:40:33,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:33,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632725429] [2021-12-15 09:40:33,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632725429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:33,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:33,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:33,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079417419] [2021-12-15 09:40:33,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:33,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:33,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:33,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:33,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:33,604 INFO L87 Difference]: Start difference. First operand 53325 states and 62889 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:36,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:36,352 INFO L93 Difference]: Finished difference Result 130680 states and 156456 transitions. [2021-12-15 09:40:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:36,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2021-12-15 09:40:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:36,532 INFO L225 Difference]: With dead ends: 130680 [2021-12-15 09:40:36,532 INFO L226 Difference]: Without dead ends: 78108 [2021-12-15 09:40:36,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:36,556 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 818 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:36,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 390 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 09:40:36,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78108 states. [2021-12-15 09:40:37,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78108 to 74353. [2021-12-15 09:40:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74353 states, 74352 states have (on average 1.192435980202281) internal successors, (88660), 74352 states have internal predecessors, (88660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74353 states to 74353 states and 88660 transitions. [2021-12-15 09:40:37,464 INFO L78 Accepts]: Start accepts. Automaton has 74353 states and 88660 transitions. Word has length 253 [2021-12-15 09:40:37,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:37,465 INFO L470 AbstractCegarLoop]: Abstraction has 74353 states and 88660 transitions. [2021-12-15 09:40:37,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:37,465 INFO L276 IsEmpty]: Start isEmpty. Operand 74353 states and 88660 transitions. [2021-12-15 09:40:37,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-12-15 09:40:37,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:37,467 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:37,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:40:37,467 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:37,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:37,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1640314461, now seen corresponding path program 1 times [2021-12-15 09:40:37,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:37,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249609158] [2021-12-15 09:40:37,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:37,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:37,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-15 09:40:37,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:37,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249609158] [2021-12-15 09:40:37,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249609158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:37,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:37,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:37,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905453899] [2021-12-15 09:40:37,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:37,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:37,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:37,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:37,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:37,542 INFO L87 Difference]: Start difference. First operand 74353 states and 88660 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:40,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:40,437 INFO L93 Difference]: Finished difference Result 176491 states and 212417 transitions. [2021-12-15 09:40:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:40,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 275 [2021-12-15 09:40:40,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:40,561 INFO L225 Difference]: With dead ends: 176491 [2021-12-15 09:40:40,561 INFO L226 Difference]: Without dead ends: 102891 [2021-12-15 09:40:40,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:40,606 INFO L933 BasicCegarLoop]: 1379 mSDtfsCounter, 741 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 2869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:40,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 1387 Invalid, 2869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:40:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102891 states. [2021-12-15 09:40:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102891 to 102891. [2021-12-15 09:40:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102891 states, 102890 states have (on average 1.1470502478374964) internal successors, (118020), 102890 states have internal predecessors, (118020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102891 states to 102891 states and 118020 transitions. [2021-12-15 09:40:41,875 INFO L78 Accepts]: Start accepts. Automaton has 102891 states and 118020 transitions. Word has length 275 [2021-12-15 09:40:41,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:41,876 INFO L470 AbstractCegarLoop]: Abstraction has 102891 states and 118020 transitions. [2021-12-15 09:40:41,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 102891 states and 118020 transitions. [2021-12-15 09:40:41,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2021-12-15 09:40:41,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:41,888 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:41,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:40:41,888 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:41,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:41,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1486317683, now seen corresponding path program 1 times [2021-12-15 09:40:41,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:41,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998896709] [2021-12-15 09:40:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:41,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 09:40:42,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:42,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998896709] [2021-12-15 09:40:42,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998896709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:42,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:42,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:42,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264150986] [2021-12-15 09:40:42,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:42,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:42,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:42,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:42,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:42,155 INFO L87 Difference]: Start difference. First operand 102891 states and 118020 transitions. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:45,242 INFO L93 Difference]: Finished difference Result 243330 states and 281021 transitions. [2021-12-15 09:40:45,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:45,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 485 [2021-12-15 09:40:45,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:45,414 INFO L225 Difference]: With dead ends: 243330 [2021-12-15 09:40:45,415 INFO L226 Difference]: Without dead ends: 141192 [2021-12-15 09:40:45,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:45,447 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 570 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2244 mSolverCounterSat, 710 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 710 IncrementalHoareTripleChecker+Valid, 2244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:45,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 391 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [710 Valid, 2244 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:40:45,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141192 states. [2021-12-15 09:40:46,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141192 to 141192. [2021-12-15 09:40:46,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141192 states, 141191 states have (on average 1.128712170039167) internal successors, (159364), 141191 states have internal predecessors, (159364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141192 states to 141192 states and 159364 transitions. [2021-12-15 09:40:47,183 INFO L78 Accepts]: Start accepts. Automaton has 141192 states and 159364 transitions. Word has length 485 [2021-12-15 09:40:47,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:47,184 INFO L470 AbstractCegarLoop]: Abstraction has 141192 states and 159364 transitions. [2021-12-15 09:40:47,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:47,184 INFO L276 IsEmpty]: Start isEmpty. Operand 141192 states and 159364 transitions. [2021-12-15 09:40:47,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2021-12-15 09:40:47,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:47,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:47,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:40:47,226 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:47,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:47,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2107580097, now seen corresponding path program 1 times [2021-12-15 09:40:47,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:47,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513890208] [2021-12-15 09:40:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:47,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-15 09:40:47,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:47,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513890208] [2021-12-15 09:40:47,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513890208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:47,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:47,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:47,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363229775] [2021-12-15 09:40:47,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:47,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:47,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:47,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:47,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:47,410 INFO L87 Difference]: Start difference. First operand 141192 states and 159364 transitions. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:50,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:50,358 INFO L93 Difference]: Finished difference Result 281631 states and 317970 transitions. [2021-12-15 09:40:50,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:50,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 532 [2021-12-15 09:40:50,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:50,530 INFO L225 Difference]: With dead ends: 281631 [2021-12-15 09:40:50,530 INFO L226 Difference]: Without dead ends: 141192 [2021-12-15 09:40:50,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:50,579 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 551 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2439 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 2439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:50,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 240 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 2439 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:40:50,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141192 states. [2021-12-15 09:40:52,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141192 to 140441. [2021-12-15 09:40:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140441 states, 140440 states have (on average 1.1244161207633152) internal successors, (157913), 140440 states have internal predecessors, (157913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140441 states to 140441 states and 157913 transitions. [2021-12-15 09:40:52,285 INFO L78 Accepts]: Start accepts. Automaton has 140441 states and 157913 transitions. Word has length 532 [2021-12-15 09:40:52,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:52,285 INFO L470 AbstractCegarLoop]: Abstraction has 140441 states and 157913 transitions. [2021-12-15 09:40:52,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:52,286 INFO L276 IsEmpty]: Start isEmpty. Operand 140441 states and 157913 transitions. [2021-12-15 09:40:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2021-12-15 09:40:52,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:52,304 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:52,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:40:52,304 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:52,305 INFO L85 PathProgramCache]: Analyzing trace with hash -851250887, now seen corresponding path program 1 times [2021-12-15 09:40:52,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:52,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764967695] [2021-12-15 09:40:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:52,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 116 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:40:52,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:52,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764967695] [2021-12-15 09:40:52,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764967695] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:40:52,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602758011] [2021-12-15 09:40:52,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:52,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:40:52,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:40:52,495 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) [2021-12-15 09:40:52,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:40:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:52,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:40:52,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:40:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 09:40:53,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:40:53,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602758011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:53,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:40:53,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:40:53,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972571221] [2021-12-15 09:40:53,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:53,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:53,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:53,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:53,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:40:53,652 INFO L87 Difference]: Start difference. First operand 140441 states and 157913 transitions. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:56,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:40:56,546 INFO L93 Difference]: Finished difference Result 314675 states and 356802 transitions. [2021-12-15 09:40:56,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:40:56,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 577 [2021-12-15 09:40:56,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:40:56,933 INFO L225 Difference]: With dead ends: 314675 [2021-12-15 09:40:56,934 INFO L226 Difference]: Without dead ends: 174987 [2021-12-15 09:40:56,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 576 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:40:56,963 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 528 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 903 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 2978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:40:56,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 238 Invalid, 2978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 2075 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 09:40:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174987 states. [2021-12-15 09:40:58,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174987 to 174987. [2021-12-15 09:40:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174987 states, 174986 states have (on average 1.1167807710331112) internal successors, (195421), 174986 states have internal predecessors, (195421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174987 states to 174987 states and 195421 transitions. [2021-12-15 09:40:58,900 INFO L78 Accepts]: Start accepts. Automaton has 174987 states and 195421 transitions. Word has length 577 [2021-12-15 09:40:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:40:58,900 INFO L470 AbstractCegarLoop]: Abstraction has 174987 states and 195421 transitions. [2021-12-15 09:40:58,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:40:58,900 INFO L276 IsEmpty]: Start isEmpty. Operand 174987 states and 195421 transitions. [2021-12-15 09:40:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2021-12-15 09:40:58,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:40:58,920 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:40:58,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:40:59,121 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,SelfDestructingSolverStorable13 [2021-12-15 09:40:59,122 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:40:59,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:40:59,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1296497783, now seen corresponding path program 1 times [2021-12-15 09:40:59,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:40:59,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785353082] [2021-12-15 09:40:59,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:40:59,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:40:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:40:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-15 09:40:59,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:40:59,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785353082] [2021-12-15 09:40:59,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785353082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:40:59,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:40:59,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:40:59,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64205026] [2021-12-15 09:40:59,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:40:59,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:40:59,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:40:59,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:40:59,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:40:59,543 INFO L87 Difference]: Start difference. First operand 174987 states and 195421 transitions. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)