./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label00.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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_label00.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 48b75eefd299c5e358d6f7c99602002262fce20f93b0f1303552b05fdc1d7cc8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:15:11,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:15:11,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:15:11,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:15:11,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:15:11,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:15:11,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:15:11,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:15:11,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:15:11,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:15:11,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:15:11,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:15:11,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:15:11,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:15:11,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:15:11,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:15:11,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:15:11,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:15:11,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:15:11,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:15:11,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:15:11,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:15:11,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:15:11,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:15:11,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:15:11,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:15:11,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:15:11,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:15:11,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:15:11,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:15:11,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:15:11,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:15:11,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:15:11,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:15:11,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:15:11,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:15:11,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:15:11,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:15:11,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:15:11,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:15:11,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:15:11,659 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:15:11,684 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:15:11,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:15:11,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:15:11,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:15:11,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:15:11,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:15:11,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:15:11,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:15:11,689 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:15:11,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:15:11,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:15:11,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:15:11,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:15:11,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:15:11,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:15:11,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:15:11,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:15:11,692 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:15:11,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:15:11,692 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:15:11,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:15:11,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:15:11,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:15:11,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:15:11,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:15:11,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:15:11,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:15:11,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:15:11,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:15:11,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:15:11,694 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:15:11,694 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:15:11,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:15:11,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:15:11,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48b75eefd299c5e358d6f7c99602002262fce20f93b0f1303552b05fdc1d7cc8 [2021-12-22 09:15:11,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:15:11,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:15:11,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:15:11,927 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:15:11,928 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:15:11,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label00.c [2021-12-22 09:15:11,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70dea5158/d435f3b576304b2da55d69faac518b52/FLAG75555b071 [2021-12-22 09:15:12,665 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:15:12,666 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label00.c [2021-12-22 09:15:12,695 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70dea5158/d435f3b576304b2da55d69faac518b52/FLAG75555b071 [2021-12-22 09:15:12,824 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70dea5158/d435f3b576304b2da55d69faac518b52 [2021-12-22 09:15:12,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:15:12,831 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:15:12,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:15:12,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:15:12,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:15:12,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:15:12" (1/1) ... [2021-12-22 09:15:12,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11ec79a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:12, skipping insertion in model container [2021-12-22 09:15:12,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:15:12" (1/1) ... [2021-12-22 09:15:12,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:15:12,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:15:13,203 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_label00.c[2236,2249] [2021-12-22 09:15:13,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:15:13,944 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:15:13,969 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label00.c[2236,2249] [2021-12-22 09:15:14,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:15:14,388 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:15:14,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:14 WrapperNode [2021-12-22 09:15:14,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:15:14,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:15:14,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:15:14,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:15:14,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:14" (1/1) ... [2021-12-22 09:15:14,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:14" (1/1) ... [2021-12-22 09:15:14,718 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-22 09:15:14,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:15:14,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:15:14,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:15:14,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:15:14,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:14" (1/1) ... [2021-12-22 09:15:14,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:14" (1/1) ... [2021-12-22 09:15:14,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:14" (1/1) ... [2021-12-22 09:15:14,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:14" (1/1) ... [2021-12-22 09:15:14,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:14" (1/1) ... [2021-12-22 09:15:14,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:14" (1/1) ... [2021-12-22 09:15:15,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:14" (1/1) ... [2021-12-22 09:15:15,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:15:15,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:15:15,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:15:15,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:15:15,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:14" (1/1) ... [2021-12-22 09:15:15,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:15:15,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:15:15,136 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) [2021-12-22 09:15:15,162 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 [2021-12-22 09:15:15,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:15:15,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:15:15,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:15:15,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:15:15,314 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:15:15,327 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:15:18,761 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:15:18,772 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:15:18,773 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:15:18,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:15:18 BoogieIcfgContainer [2021-12-22 09:15:18,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:15:18,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:15:18,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:15:18,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:15:18,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:15:12" (1/3) ... [2021-12-22 09:15:18,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58141566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:15:18, skipping insertion in model container [2021-12-22 09:15:18,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:15:14" (2/3) ... [2021-12-22 09:15:18,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58141566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:15:18, skipping insertion in model container [2021-12-22 09:15:18,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:15:18" (3/3) ... [2021-12-22 09:15:18,782 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label00.c [2021-12-22 09:15:18,786 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:15:18,786 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:15:18,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:15:18,831 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 [2021-12-22 09:15:18,832 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:15:18,856 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) [2021-12-22 09:15:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 09:15:18,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:18,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:18,861 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:18,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:18,866 INFO L85 PathProgramCache]: Analyzing trace with hash -884752143, now seen corresponding path program 1 times [2021-12-22 09:15:18,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:18,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108661387] [2021-12-22 09:15:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:18,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:15:19,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:19,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108661387] [2021-12-22 09:15:19,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108661387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:19,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:19,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:15:19,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645240394] [2021-12-22 09:15:19,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:19,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:19,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:19,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:15:19,090 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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) [2021-12-22 09:15:22,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:22,416 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-12-22 09:15:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:22,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 15 [2021-12-22 09:15:22,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:22,450 INFO L225 Difference]: With dead ends: 2388 [2021-12-22 09:15:22,451 INFO L226 Difference]: Without dead ends: 1506 [2021-12-22 09:15:22,459 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 [2021-12-22 09:15:22,462 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 819 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 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, 3.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:22,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 481 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-22 09:15:22,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-22 09:15:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-22 09:15:22,552 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) [2021-12-22 09:15:22,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2466 transitions. [2021-12-22 09:15:22,558 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2466 transitions. Word has length 15 [2021-12-22 09:15:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:22,559 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2466 transitions. [2021-12-22 09:15:22,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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) [2021-12-22 09:15:22,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2466 transitions. [2021-12-22 09:15:22,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-22 09:15:22,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:22,562 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:22,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:15:22,562 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:22,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1356240323, now seen corresponding path program 1 times [2021-12-22 09:15:22,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:22,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810077906] [2021-12-22 09:15:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:22,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:15:22,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:22,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810077906] [2021-12-22 09:15:22,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810077906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:22,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:22,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:15:22,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271784186] [2021-12-22 09:15:22,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:22,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:22,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:22,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:22,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:15:22,667 INFO L87 Difference]: Start difference. First operand 1506 states and 2466 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-12-22 09:15:25,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:25,765 INFO L93 Difference]: Finished difference Result 4512 states and 7393 transitions. [2021-12-22 09:15:25,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:25,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 86 [2021-12-22 09:15:25,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:25,779 INFO L225 Difference]: With dead ends: 4512 [2021-12-22 09:15:25,779 INFO L226 Difference]: Without dead ends: 3008 [2021-12-22 09:15:25,786 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 [2021-12-22 09:15:25,787 INFO L933 BasicCegarLoop]: 1149 mSDtfsCounter, 753 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 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, 3.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:25,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1157 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-22 09:15:25,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-12-22 09:15:25,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2021-12-22 09:15:25,876 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) [2021-12-22 09:15:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4622 transitions. [2021-12-22 09:15:25,886 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4622 transitions. Word has length 86 [2021-12-22 09:15:25,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:25,888 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4622 transitions. [2021-12-22 09:15:25,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2021-12-22 09:15:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4622 transitions. [2021-12-22 09:15:25,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-22 09:15:25,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:25,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:25,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:15:25,902 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:25,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:25,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1990984141, now seen corresponding path program 1 times [2021-12-22 09:15:25,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:25,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370800902] [2021-12-22 09:15:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:25,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:15:25,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:25,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370800902] [2021-12-22 09:15:25,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370800902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:25,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:25,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:15:25,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632803721] [2021-12-22 09:15:25,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:25,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:25,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:25,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:25,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:15:25,989 INFO L87 Difference]: Start difference. First operand 3008 states and 4622 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2021-12-22 09:15:28,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:28,475 INFO L93 Difference]: Finished difference Result 9018 states and 13861 transitions. [2021-12-22 09:15:28,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:28,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 89 [2021-12-22 09:15:28,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:28,501 INFO L225 Difference]: With dead ends: 9018 [2021-12-22 09:15:28,502 INFO L226 Difference]: Without dead ends: 6012 [2021-12-22 09:15:28,506 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 [2021-12-22 09:15:28,514 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 775 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:28,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 447 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 09:15:28,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2021-12-22 09:15:28,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 6012. [2021-12-22 09:15:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 1.3726501414074197) internal successors, (8251), 6011 states have internal predecessors, (8251), 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) [2021-12-22 09:15:28,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 8251 transitions. [2021-12-22 09:15:28,618 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 8251 transitions. Word has length 89 [2021-12-22 09:15:28,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:28,619 INFO L470 AbstractCegarLoop]: Abstraction has 6012 states and 8251 transitions. [2021-12-22 09:15:28,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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) [2021-12-22 09:15:28,620 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 8251 transitions. [2021-12-22 09:15:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-22 09:15:28,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:28,623 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:28,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:15:28,624 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:28,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1407375044, now seen corresponding path program 1 times [2021-12-22 09:15:28,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:28,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364830400] [2021-12-22 09:15:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:28,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:15:28,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:28,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364830400] [2021-12-22 09:15:28,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364830400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:28,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:28,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:15:28,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475906233] [2021-12-22 09:15:28,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:28,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 09:15:28,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:28,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 09:15:28,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:15:28,831 INFO L87 Difference]: Start difference. First operand 6012 states and 8251 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-12-22 09:15:33,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:33,988 INFO L93 Difference]: Finished difference Result 16528 states and 22713 transitions. [2021-12-22 09:15:33,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 09:15:33,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 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 96 [2021-12-22 09:15:33,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:34,019 INFO L225 Difference]: With dead ends: 16528 [2021-12-22 09:15:34,019 INFO L226 Difference]: Without dead ends: 10518 [2021-12-22 09:15:34,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:15:34,028 INFO L933 BasicCegarLoop]: 658 mSDtfsCounter, 4360 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5301 mSolverCounterSat, 973 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4360 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 6274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 973 IncrementalHoareTripleChecker+Valid, 5301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:34,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4360 Valid, 684 Invalid, 6274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [973 Valid, 5301 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-22 09:15:34,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10518 states. [2021-12-22 09:15:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10518 to 9767. [2021-12-22 09:15:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.2520991193938154) internal successors, (12228), 9766 states have internal predecessors, (12228), 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) [2021-12-22 09:15:34,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12228 transitions. [2021-12-22 09:15:34,195 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12228 transitions. Word has length 96 [2021-12-22 09:15:34,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:34,196 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12228 transitions. [2021-12-22 09:15:34,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-12-22 09:15:34,197 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12228 transitions. [2021-12-22 09:15:34,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 09:15:34,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:34,199 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:34,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:15:34,199 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:34,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:34,200 INFO L85 PathProgramCache]: Analyzing trace with hash -2043288918, now seen corresponding path program 1 times [2021-12-22 09:15:34,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:34,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152790019] [2021-12-22 09:15:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:34,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:15:34,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:34,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152790019] [2021-12-22 09:15:34,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152790019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:34,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:34,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:15:34,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136057292] [2021-12-22 09:15:34,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:34,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:15:34,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:34,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:15:34,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:15:34,334 INFO L87 Difference]: Start difference. First operand 9767 states and 12228 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 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) [2021-12-22 09:15:37,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:37,439 INFO L93 Difference]: Finished difference Result 27081 states and 34206 transitions. [2021-12-22 09:15:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:15:37,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 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 167 [2021-12-22 09:15:37,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:37,484 INFO L225 Difference]: With dead ends: 27081 [2021-12-22 09:15:37,484 INFO L226 Difference]: Without dead ends: 17279 [2021-12-22 09:15:37,495 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 [2021-12-22 09:15:37,496 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 706 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3109 mSolverCounterSat, 728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 3837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 728 IncrementalHoareTripleChecker+Valid, 3109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:37,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 710 Invalid, 3837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [728 Valid, 3109 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-22 09:15:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17279 states. [2021-12-22 09:15:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17279 to 15775. [2021-12-22 09:15:37,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.1640674527703816) internal successors, (18362), 15774 states have internal predecessors, (18362), 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) [2021-12-22 09:15:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 18362 transitions. [2021-12-22 09:15:37,718 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 18362 transitions. Word has length 167 [2021-12-22 09:15:37,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:37,719 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 18362 transitions. [2021-12-22 09:15:37,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 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) [2021-12-22 09:15:37,720 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 18362 transitions. [2021-12-22 09:15:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-22 09:15:37,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:37,722 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-22 09:15:37,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:15:37,723 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:37,723 INFO L85 PathProgramCache]: Analyzing trace with hash -358179269, now seen corresponding path program 1 times [2021-12-22 09:15:37,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:37,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851214381] [2021-12-22 09:15:37,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:37,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-22 09:15:37,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:37,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851214381] [2021-12-22 09:15:37,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851214381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:37,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:37,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:15:37,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124155836] [2021-12-22 09:15:37,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:37,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:37,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:37,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:15:37,902 INFO L87 Difference]: Start difference. First operand 15775 states and 18362 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 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) [2021-12-22 09:15:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:40,671 INFO L93 Difference]: Finished difference Result 39811 states and 47231 transitions. [2021-12-22 09:15:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:40,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 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 237 [2021-12-22 09:15:40,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:40,712 INFO L225 Difference]: With dead ends: 39811 [2021-12-22 09:15:40,712 INFO L226 Difference]: Without dead ends: 24038 [2021-12-22 09:15:40,725 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 [2021-12-22 09:15:40,726 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:40,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 310 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-22 09:15:40,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24038 states. [2021-12-22 09:15:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24038 to 23285. [2021-12-22 09:15:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23285 states, 23284 states have (on average 1.1568459027658478) internal successors, (26936), 23284 states have internal predecessors, (26936), 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) [2021-12-22 09:15:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23285 states to 23285 states and 26936 transitions. [2021-12-22 09:15:41,016 INFO L78 Accepts]: Start accepts. Automaton has 23285 states and 26936 transitions. Word has length 237 [2021-12-22 09:15:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:41,017 INFO L470 AbstractCegarLoop]: Abstraction has 23285 states and 26936 transitions. [2021-12-22 09:15:41,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 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) [2021-12-22 09:15:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 23285 states and 26936 transitions. [2021-12-22 09:15:41,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-22 09:15:41,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:41,020 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-22 09:15:41,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:15:41,021 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:41,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:41,021 INFO L85 PathProgramCache]: Analyzing trace with hash -999996468, now seen corresponding path program 1 times [2021-12-22 09:15:41,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:41,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484265648] [2021-12-22 09:15:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:41,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:15:41,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:41,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484265648] [2021-12-22 09:15:41,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484265648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:41,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:41,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:15:41,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337319266] [2021-12-22 09:15:41,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:41,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:41,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:41,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:41,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:15:41,139 INFO L87 Difference]: Start difference. First operand 23285 states and 26936 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2021-12-22 09:15:44,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:44,073 INFO L93 Difference]: Finished difference Result 60086 states and 69678 transitions. [2021-12-22 09:15:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:44,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 242 [2021-12-22 09:15:44,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:44,125 INFO L225 Difference]: With dead ends: 60086 [2021-12-22 09:15:44,125 INFO L226 Difference]: Without dead ends: 36803 [2021-12-22 09:15:44,146 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 [2021-12-22 09:15:44,147 INFO L933 BasicCegarLoop]: 1317 mSDtfsCounter, 676 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 3066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:44,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 1325 Invalid, 3066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 2692 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 09:15:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36803 states. [2021-12-22 09:15:44,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36803 to 33799. [2021-12-22 09:15:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33799 states, 33798 states have (on average 1.1530563938694598) internal successors, (38971), 33798 states have internal predecessors, (38971), 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) [2021-12-22 09:15:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33799 states to 33799 states and 38971 transitions. [2021-12-22 09:15:44,550 INFO L78 Accepts]: Start accepts. Automaton has 33799 states and 38971 transitions. Word has length 242 [2021-12-22 09:15:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:44,550 INFO L470 AbstractCegarLoop]: Abstraction has 33799 states and 38971 transitions. [2021-12-22 09:15:44,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2021-12-22 09:15:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 33799 states and 38971 transitions. [2021-12-22 09:15:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-12-22 09:15:44,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:44,557 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:15:44,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:15:44,558 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:44,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:44,560 INFO L85 PathProgramCache]: Analyzing trace with hash -400405687, now seen corresponding path program 1 times [2021-12-22 09:15:44,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:44,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355385232] [2021-12-22 09:15:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:44,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-22 09:15:44,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:44,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355385232] [2021-12-22 09:15:44,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355385232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:44,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:44,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:15:44,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147281354] [2021-12-22 09:15:44,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:44,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:44,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:44,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:44,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:15:44,734 INFO L87 Difference]: Start difference. First operand 33799 states and 38971 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2021-12-22 09:15:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:47,410 INFO L93 Difference]: Finished difference Result 78861 states and 90211 transitions. [2021-12-22 09:15:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:47,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 292 [2021-12-22 09:15:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:47,468 INFO L225 Difference]: With dead ends: 78861 [2021-12-22 09:15:47,468 INFO L226 Difference]: Without dead ends: 45064 [2021-12-22 09:15:47,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:15:47,499 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 819 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 2754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:47,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 205 Invalid, 2754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 09:15:47,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45064 states. [2021-12-22 09:15:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45064 to 40558. [2021-12-22 09:15:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40558 states, 40557 states have (on average 1.1331459427472446) internal successors, (45957), 40557 states have internal predecessors, (45957), 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) [2021-12-22 09:15:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40558 states to 40558 states and 45957 transitions. [2021-12-22 09:15:47,996 INFO L78 Accepts]: Start accepts. Automaton has 40558 states and 45957 transitions. Word has length 292 [2021-12-22 09:15:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:47,997 INFO L470 AbstractCegarLoop]: Abstraction has 40558 states and 45957 transitions. [2021-12-22 09:15:47,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2021-12-22 09:15:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 40558 states and 45957 transitions. [2021-12-22 09:15:48,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-12-22 09:15:48,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:48,001 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:48,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:15:48,004 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:48,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:48,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2085073940, now seen corresponding path program 1 times [2021-12-22 09:15:48,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:48,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399121843] [2021-12-22 09:15:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:48,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-22 09:15:48,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:48,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399121843] [2021-12-22 09:15:48,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399121843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:48,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:48,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:15:48,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301636562] [2021-12-22 09:15:48,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:48,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:48,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:48,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:48,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:15:48,141 INFO L87 Difference]: Start difference. First operand 40558 states and 45957 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2021-12-22 09:15:50,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:50,717 INFO L93 Difference]: Finished difference Result 96134 states and 110249 transitions. [2021-12-22 09:15:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:50,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 314 [2021-12-22 09:15:50,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:50,786 INFO L225 Difference]: With dead ends: 96134 [2021-12-22 09:15:50,786 INFO L226 Difference]: Without dead ends: 55578 [2021-12-22 09:15:50,819 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 [2021-12-22 09:15:50,820 INFO L933 BasicCegarLoop]: 1208 mSDtfsCounter, 704 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:50,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 1216 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 09:15:50,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55578 states. [2021-12-22 09:15:51,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55578 to 55578. [2021-12-22 09:15:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55578 states, 55577 states have (on average 1.1162351332385698) internal successors, (62037), 55577 states have internal predecessors, (62037), 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) [2021-12-22 09:15:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55578 states to 55578 states and 62037 transitions. [2021-12-22 09:15:51,495 INFO L78 Accepts]: Start accepts. Automaton has 55578 states and 62037 transitions. Word has length 314 [2021-12-22 09:15:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:51,495 INFO L470 AbstractCegarLoop]: Abstraction has 55578 states and 62037 transitions. [2021-12-22 09:15:51,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2021-12-22 09:15:51,496 INFO L276 IsEmpty]: Start isEmpty. Operand 55578 states and 62037 transitions. [2021-12-22 09:15:51,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-12-22 09:15:51,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:51,502 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:51,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 09:15:51,503 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:51,503 INFO L85 PathProgramCache]: Analyzing trace with hash 314874820, now seen corresponding path program 1 times [2021-12-22 09:15:51,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:51,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698943344] [2021-12-22 09:15:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:51,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-22 09:15:51,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:51,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698943344] [2021-12-22 09:15:51,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698943344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:51,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:51,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:15:51,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623584685] [2021-12-22 09:15:51,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:51,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:51,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:51,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:51,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:15:51,634 INFO L87 Difference]: Start difference. First operand 55578 states and 62037 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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) [2021-12-22 09:15:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:54,667 INFO L93 Difference]: Finished difference Result 128427 states and 145272 transitions. [2021-12-22 09:15:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:54,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 346 [2021-12-22 09:15:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:54,748 INFO L225 Difference]: With dead ends: 128427 [2021-12-22 09:15:54,748 INFO L226 Difference]: Without dead ends: 69096 [2021-12-22 09:15:54,777 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 [2021-12-22 09:15:54,778 INFO L933 BasicCegarLoop]: 1307 mSDtfsCounter, 778 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:54,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1315 Invalid, 2854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-22 09:15:54,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69096 states. [2021-12-22 09:15:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69096 to 67594. [2021-12-22 09:15:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67594 states, 67593 states have (on average 1.107318805201722) internal successors, (74847), 67593 states have internal predecessors, (74847), 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) [2021-12-22 09:15:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67594 states to 67594 states and 74847 transitions. [2021-12-22 09:15:55,599 INFO L78 Accepts]: Start accepts. Automaton has 67594 states and 74847 transitions. Word has length 346 [2021-12-22 09:15:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:55,600 INFO L470 AbstractCegarLoop]: Abstraction has 67594 states and 74847 transitions. [2021-12-22 09:15:55,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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) [2021-12-22 09:15:55,600 INFO L276 IsEmpty]: Start isEmpty. Operand 67594 states and 74847 transitions. [2021-12-22 09:15:55,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-12-22 09:15:55,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:55,610 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:15:55,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:15:55,611 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:55,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:55,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2050413354, now seen corresponding path program 1 times [2021-12-22 09:15:55,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:55,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826290040] [2021-12-22 09:15:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:55,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-22 09:15:55,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:55,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826290040] [2021-12-22 09:15:55,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826290040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:15:55,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:15:55,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:15:55,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710128281] [2021-12-22 09:15:55,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:15:55,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:15:55,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:15:55,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:15:55,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:15:55,876 INFO L87 Difference]: Start difference. First operand 67594 states and 74847 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2021-12-22 09:15:58,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:15:58,601 INFO L93 Difference]: Finished difference Result 135186 states and 149692 transitions. [2021-12-22 09:15:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:15:58,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 409 [2021-12-22 09:15:58,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:15:58,670 INFO L225 Difference]: With dead ends: 135186 [2021-12-22 09:15:58,670 INFO L226 Difference]: Without dead ends: 67594 [2021-12-22 09:15:58,705 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 [2021-12-22 09:15:58,706 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 684 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2417 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 2417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:15:58,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 219 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 2417 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 09:15:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67594 states. [2021-12-22 09:15:59,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67594 to 67594. [2021-12-22 09:15:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67594 states, 67593 states have (on average 1.1030284201026734) internal successors, (74557), 67593 states have internal predecessors, (74557), 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) [2021-12-22 09:15:59,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67594 states to 67594 states and 74557 transitions. [2021-12-22 09:15:59,471 INFO L78 Accepts]: Start accepts. Automaton has 67594 states and 74557 transitions. Word has length 409 [2021-12-22 09:15:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:15:59,471 INFO L470 AbstractCegarLoop]: Abstraction has 67594 states and 74557 transitions. [2021-12-22 09:15:59,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2021-12-22 09:15:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 67594 states and 74557 transitions. [2021-12-22 09:15:59,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2021-12-22 09:15:59,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:15:59,489 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:15:59,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 09:15:59,490 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:15:59,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:15:59,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1353959124, now seen corresponding path program 1 times [2021-12-22 09:15:59,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:15:59,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832918643] [2021-12-22 09:15:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:59,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:15:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:15:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 424 proven. 229 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 09:15:59,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:15:59,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832918643] [2021-12-22 09:15:59,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832918643] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:15:59,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107496818] [2021-12-22 09:15:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:15:59,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:15:59,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:15:59,987 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) [2021-12-22 09:15:59,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:16:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:16:00,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:16:00,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:16:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2021-12-22 09:16:01,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:16:01,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107496818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:16:01,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:16:01,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-22 09:16:01,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80036728] [2021-12-22 09:16:01,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:16:01,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:16:01,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:16:01,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:16:01,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:16:01,022 INFO L87 Difference]: Start difference. First operand 67594 states and 74557 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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) [2021-12-22 09:16:03,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:16:03,731 INFO L93 Difference]: Finished difference Result 150957 states and 168521 transitions. [2021-12-22 09:16:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:16:03,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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 517 [2021-12-22 09:16:03,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:16:03,820 INFO L225 Difference]: With dead ends: 150957 [2021-12-22 09:16:03,820 INFO L226 Difference]: Without dead ends: 83365 [2021-12-22 09:16:03,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:16:03,850 INFO L933 BasicCegarLoop]: 1389 mSDtfsCounter, 645 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2142 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 2142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:16:03,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 1397 Invalid, 2731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 2142 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 09:16:03,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83365 states. [2021-12-22 09:16:04,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83365 to 79610. [2021-12-22 09:16:04,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79610 states, 79609 states have (on average 1.0953284176412215) internal successors, (87198), 79609 states have internal predecessors, (87198), 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) [2021-12-22 09:16:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79610 states to 79610 states and 87198 transitions. [2021-12-22 09:16:04,807 INFO L78 Accepts]: Start accepts. Automaton has 79610 states and 87198 transitions. Word has length 517 [2021-12-22 09:16:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:16:04,808 INFO L470 AbstractCegarLoop]: Abstraction has 79610 states and 87198 transitions. [2021-12-22 09:16:04,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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) [2021-12-22 09:16:04,808 INFO L276 IsEmpty]: Start isEmpty. Operand 79610 states and 87198 transitions. [2021-12-22 09:16:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2021-12-22 09:16:04,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:16:04,825 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2021-12-22 09:16:04,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:16:05,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 09:16:05,049 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:16:05,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:16:05,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1858215506, now seen corresponding path program 1 times [2021-12-22 09:16:05,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:16:05,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849551009] [2021-12-22 09:16:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:16:05,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:16:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:16:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 529 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-12-22 09:16:05,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:16:05,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849551009] [2021-12-22 09:16:05,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849551009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:16:05,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:16:05,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:16:05,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353535129] [2021-12-22 09:16:05,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:16:05,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:16:05,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:16:05,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:16:05,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:16:05,430 INFO L87 Difference]: Start difference. First operand 79610 states and 87198 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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)