./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa --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 d2ba51bdecedc8a39a24625eeb8da910bb1c988071a15f12bed2cd804a9146c3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:48:47,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:48:47,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:48:47,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:48:47,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:48:47,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:48:47,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:48:47,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:48:47,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:48:47,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:48:47,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:48:47,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:48:47,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:48:47,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:48:47,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:48:47,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:48:47,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:48:47,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:48:47,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:48:47,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:48:47,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:48:47,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:48:47,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:48:47,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:48:47,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:48:47,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:48:47,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:48:47,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:48:47,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:48:47,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:48:47,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:48:47,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:48:47,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:48:47,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:48:47,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:48:47,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:48:47,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:48:47,639 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:48:47,639 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:48:47,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:48:47,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:48:47,640 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:48:47,657 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:48:47,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:48:47,657 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:48:47,657 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:48:47,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:48:47,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:48:47,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:48:47,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:48:47,659 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:48:47,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:48:47,659 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:48:47,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:48:47,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:48:47,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:48:47,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:48:47,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:48:47,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:48:47,660 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:48:47,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:48:47,660 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:48:47,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:48:47,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:48:47,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:48:47,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:48:47,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:48:47,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:48:47,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:48:47,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:48:47,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:48:47,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:48:47,662 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:48:47,662 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:48:47,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:48:47,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:48:47,662 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2ba51bdecedc8a39a24625eeb8da910bb1c988071a15f12bed2cd804a9146c3 [2021-12-06 17:48:47,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:48:47,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:48:47,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:48:47,865 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:48:47,866 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:48:47,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-06 17:48:47,918 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/data/5645bdad5/432ab7d8d68d40ababa96b9a300cd22d/FLAG089e99e2a [2021-12-06 17:48:48,315 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:48:48,315 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-06 17:48:48,323 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/data/5645bdad5/432ab7d8d68d40ababa96b9a300cd22d/FLAG089e99e2a [2021-12-06 17:48:48,332 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/data/5645bdad5/432ab7d8d68d40ababa96b9a300cd22d [2021-12-06 17:48:48,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:48:48,336 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:48:48,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:48:48,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:48:48,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:48:48,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3304a899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48, skipping insertion in model container [2021-12-06 17:48:48,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:48:48,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:48:48,563 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6638,6651] [2021-12-06 17:48:48,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:48:48,610 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:48:48,650 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6638,6651] [2021-12-06 17:48:48,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:48:48,678 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:48:48,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48 WrapperNode [2021-12-06 17:48:48,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:48:48,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:48:48,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:48:48,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:48:48,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,718 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 516 [2021-12-06 17:48:48,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:48:48,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:48:48,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:48:48,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:48:48,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:48:48,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:48:48,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:48:48,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:48:48,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (1/1) ... [2021-12-06 17:48:48,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:48:48,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:48,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:48:48,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:48:48,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:48:48,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:48:48,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:48:48,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:48:48,880 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:48:48,881 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:48:49,224 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:48:49,231 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:48:49,231 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 17:48:49,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:48:49 BoogieIcfgContainer [2021-12-06 17:48:49,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:48:49,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:48:49,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:48:49,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:48:49,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:48:48" (1/3) ... [2021-12-06 17:48:49,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47cf70e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:48:49, skipping insertion in model container [2021-12-06 17:48:49,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:48:48" (2/3) ... [2021-12-06 17:48:49,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47cf70e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:48:49, skipping insertion in model container [2021-12-06 17:48:49,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:48:49" (3/3) ... [2021-12-06 17:48:49,240 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-06 17:48:49,245 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:48:49,245 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:48:49,283 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:48:49,289 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 [2021-12-06 17:48:49,289 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:48:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 121 states have (on average 1.743801652892562) internal successors, (211), 122 states have internal predecessors, (211), 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) [2021-12-06 17:48:49,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 17:48:49,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:49,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:49,313 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:49,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:49,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1503533793, now seen corresponding path program 1 times [2021-12-06 17:48:49,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:49,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730973185] [2021-12-06 17:48:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:49,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:49,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:49,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730973185] [2021-12-06 17:48:49,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730973185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:49,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:49,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:48:49,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290692421] [2021-12-06 17:48:49,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:49,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:48:49,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:49,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:48:49,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:48:49,629 INFO L87 Difference]: Start difference. First operand has 123 states, 121 states have (on average 1.743801652892562) internal successors, (211), 122 states have internal predecessors, (211), 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 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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) [2021-12-06 17:48:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:49,828 INFO L93 Difference]: Finished difference Result 588 states and 943 transitions. [2021-12-06 17:48:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:48:49,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 61 [2021-12-06 17:48:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:49,842 INFO L225 Difference]: With dead ends: 588 [2021-12-06 17:48:49,842 INFO L226 Difference]: Without dead ends: 518 [2021-12-06 17:48:49,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:48:49,848 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 1055 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:49,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1055 Valid, 1117 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:49,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-12-06 17:48:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 186. [2021-12-06 17:48:49,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.4594594594594594) internal successors, (270), 185 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) [2021-12-06 17:48:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 270 transitions. [2021-12-06 17:48:49,894 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 270 transitions. Word has length 61 [2021-12-06 17:48:49,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:49,895 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 270 transitions. [2021-12-06 17:48:49,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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) [2021-12-06 17:48:49,895 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 270 transitions. [2021-12-06 17:48:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 17:48:49,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:49,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:49,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:48:49,897 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:49,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:49,898 INFO L85 PathProgramCache]: Analyzing trace with hash -886934908, now seen corresponding path program 1 times [2021-12-06 17:48:49,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:49,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691894938] [2021-12-06 17:48:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:49,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:50,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:50,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691894938] [2021-12-06 17:48:50,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691894938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:50,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:50,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:48:50,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030130444] [2021-12-06 17:48:50,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:50,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:48:50,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:50,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:48:50,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:48:50,003 INFO L87 Difference]: Start difference. First operand 186 states and 270 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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) [2021-12-06 17:48:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:50,093 INFO L93 Difference]: Finished difference Result 664 states and 1021 transitions. [2021-12-06 17:48:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:48:50,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 63 [2021-12-06 17:48:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:50,097 INFO L225 Difference]: With dead ends: 664 [2021-12-06 17:48:50,097 INFO L226 Difference]: Without dead ends: 562 [2021-12-06 17:48:50,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:48:50,099 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 608 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:50,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 760 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-06 17:48:50,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 292. [2021-12-06 17:48:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.5051546391752577) internal successors, (438), 291 states have internal predecessors, (438), 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) [2021-12-06 17:48:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 438 transitions. [2021-12-06 17:48:50,125 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 438 transitions. Word has length 63 [2021-12-06 17:48:50,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:50,125 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 438 transitions. [2021-12-06 17:48:50,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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) [2021-12-06 17:48:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 438 transitions. [2021-12-06 17:48:50,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 17:48:50,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:50,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:50,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:48:50,128 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:50,129 INFO L85 PathProgramCache]: Analyzing trace with hash 497894544, now seen corresponding path program 1 times [2021-12-06 17:48:50,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:50,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832486798] [2021-12-06 17:48:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:50,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:50,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:50,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832486798] [2021-12-06 17:48:50,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832486798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:50,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:50,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:48:50,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723321934] [2021-12-06 17:48:50,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:50,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:48:50,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:50,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:48:50,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:48:50,218 INFO L87 Difference]: Start difference. First operand 292 states and 438 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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) [2021-12-06 17:48:50,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:50,316 INFO L93 Difference]: Finished difference Result 765 states and 1181 transitions. [2021-12-06 17:48:50,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:48:50,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 63 [2021-12-06 17:48:50,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:50,320 INFO L225 Difference]: With dead ends: 765 [2021-12-06 17:48:50,320 INFO L226 Difference]: Without dead ends: 663 [2021-12-06 17:48:50,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:48:50,323 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 687 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:50,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 748 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:50,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-12-06 17:48:50,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 443. [2021-12-06 17:48:50,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5316742081447965) internal successors, (677), 442 states have internal predecessors, (677), 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) [2021-12-06 17:48:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 677 transitions. [2021-12-06 17:48:50,351 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 677 transitions. Word has length 63 [2021-12-06 17:48:50,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:50,351 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 677 transitions. [2021-12-06 17:48:50,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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) [2021-12-06 17:48:50,351 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 677 transitions. [2021-12-06 17:48:50,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 17:48:50,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:50,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:50,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:48:50,353 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:50,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:50,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1329115962, now seen corresponding path program 1 times [2021-12-06 17:48:50,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:50,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235852102] [2021-12-06 17:48:50,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:50,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:50,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:50,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235852102] [2021-12-06 17:48:50,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235852102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:50,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:50,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:48:50,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867632072] [2021-12-06 17:48:50,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:50,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:48:50,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:50,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:48:50,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:48:50,402 INFO L87 Difference]: Start difference. First operand 443 states and 677 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-12-06 17:48:50,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:50,460 INFO L93 Difference]: Finished difference Result 1102 states and 1714 transitions. [2021-12-06 17:48:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:48:50,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-12-06 17:48:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:50,464 INFO L225 Difference]: With dead ends: 1102 [2021-12-06 17:48:50,464 INFO L226 Difference]: Without dead ends: 750 [2021-12-06 17:48:50,466 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 [2021-12-06 17:48:50,467 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 68 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:50,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 380 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:50,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-12-06 17:48:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 734. [2021-12-06 17:48:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.5279672578444747) internal successors, (1120), 733 states have internal predecessors, (1120), 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) [2021-12-06 17:48:50,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1120 transitions. [2021-12-06 17:48:50,507 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1120 transitions. Word has length 63 [2021-12-06 17:48:50,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:50,508 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1120 transitions. [2021-12-06 17:48:50,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-12-06 17:48:50,508 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1120 transitions. [2021-12-06 17:48:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 17:48:50,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:50,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:50,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 17:48:50,509 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:50,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:50,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1501695225, now seen corresponding path program 1 times [2021-12-06 17:48:50,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:50,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966701753] [2021-12-06 17:48:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:50,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:50,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:50,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966701753] [2021-12-06 17:48:50,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966701753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:50,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:50,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:48:50,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664451910] [2021-12-06 17:48:50,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:50,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:48:50,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:50,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:48:50,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:48:50,630 INFO L87 Difference]: Start difference. First operand 734 states and 1120 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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) [2021-12-06 17:48:50,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:50,755 INFO L93 Difference]: Finished difference Result 1379 states and 2122 transitions. [2021-12-06 17:48:50,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:48:50,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 63 [2021-12-06 17:48:50,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:50,759 INFO L225 Difference]: With dead ends: 1379 [2021-12-06 17:48:50,759 INFO L226 Difference]: Without dead ends: 736 [2021-12-06 17:48:50,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:48:50,761 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 237 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:50,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 627 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:48:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-12-06 17:48:50,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 734. [2021-12-06 17:48:50,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.5225102319236017) internal successors, (1116), 733 states have internal predecessors, (1116), 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) [2021-12-06 17:48:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1116 transitions. [2021-12-06 17:48:50,795 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1116 transitions. Word has length 63 [2021-12-06 17:48:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:50,795 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 1116 transitions. [2021-12-06 17:48:50,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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) [2021-12-06 17:48:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1116 transitions. [2021-12-06 17:48:50,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 17:48:50,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:50,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:50,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:48:50,797 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:50,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1505725276, now seen corresponding path program 1 times [2021-12-06 17:48:50,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:50,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772320540] [2021-12-06 17:48:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:50,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:50,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:50,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772320540] [2021-12-06 17:48:50,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772320540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:50,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:50,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:48:50,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224050657] [2021-12-06 17:48:50,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:50,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:48:50,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:50,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:48:50,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:48:50,853 INFO L87 Difference]: Start difference. First operand 734 states and 1116 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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) [2021-12-06 17:48:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:50,985 INFO L93 Difference]: Finished difference Result 1494 states and 2292 transitions. [2021-12-06 17:48:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:48:50,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 63 [2021-12-06 17:48:50,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:50,992 INFO L225 Difference]: With dead ends: 1494 [2021-12-06 17:48:50,992 INFO L226 Difference]: Without dead ends: 1309 [2021-12-06 17:48:50,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:48:50,993 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 653 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:50,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 1062 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-12-06 17:48:51,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 928. [2021-12-06 17:48:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.528586839266451) internal successors, (1417), 927 states have internal predecessors, (1417), 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) [2021-12-06 17:48:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1417 transitions. [2021-12-06 17:48:51,039 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1417 transitions. Word has length 63 [2021-12-06 17:48:51,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:51,040 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 1417 transitions. [2021-12-06 17:48:51,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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) [2021-12-06 17:48:51,040 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1417 transitions. [2021-12-06 17:48:51,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 17:48:51,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:51,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:51,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 17:48:51,041 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:51,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:51,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1830608528, now seen corresponding path program 1 times [2021-12-06 17:48:51,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:51,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103030802] [2021-12-06 17:48:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:51,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:51,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:51,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103030802] [2021-12-06 17:48:51,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103030802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:51,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:51,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:48:51,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697396980] [2021-12-06 17:48:51,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:51,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:48:51,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:51,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:48:51,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:48:51,093 INFO L87 Difference]: Start difference. First operand 928 states and 1417 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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) [2021-12-06 17:48:51,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:51,217 INFO L93 Difference]: Finished difference Result 1688 states and 2593 transitions. [2021-12-06 17:48:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:48:51,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 63 [2021-12-06 17:48:51,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:51,224 INFO L225 Difference]: With dead ends: 1688 [2021-12-06 17:48:51,225 INFO L226 Difference]: Without dead ends: 1503 [2021-12-06 17:48:51,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:48:51,226 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 660 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:51,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 774 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-12-06 17:48:51,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1122. [2021-12-06 17:48:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 1.5325602140945584) internal successors, (1718), 1121 states have internal predecessors, (1718), 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) [2021-12-06 17:48:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1718 transitions. [2021-12-06 17:48:51,292 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1718 transitions. Word has length 63 [2021-12-06 17:48:51,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:51,292 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1718 transitions. [2021-12-06 17:48:51,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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) [2021-12-06 17:48:51,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1718 transitions. [2021-12-06 17:48:51,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:48:51,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:51,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:51,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 17:48:51,293 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:51,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:51,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1584928427, now seen corresponding path program 1 times [2021-12-06 17:48:51,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:51,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092307925] [2021-12-06 17:48:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:51,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:51,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:51,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092307925] [2021-12-06 17:48:51,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092307925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:51,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:51,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:48:51,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268207987] [2021-12-06 17:48:51,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:51,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:48:51,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:51,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:48:51,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:48:51,344 INFO L87 Difference]: Start difference. First operand 1122 states and 1718 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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) [2021-12-06 17:48:51,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:51,593 INFO L93 Difference]: Finished difference Result 3264 states and 5032 transitions. [2021-12-06 17:48:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:48:51,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 64 [2021-12-06 17:48:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:51,606 INFO L225 Difference]: With dead ends: 3264 [2021-12-06 17:48:51,606 INFO L226 Difference]: Without dead ends: 2171 [2021-12-06 17:48:51,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:48:51,609 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 659 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:51,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 148 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:51,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-12-06 17:48:51,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2021-12-06 17:48:51,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 1.5313653136531364) internal successors, (3320), 2168 states have internal predecessors, (3320), 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) [2021-12-06 17:48:51,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3320 transitions. [2021-12-06 17:48:51,717 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3320 transitions. Word has length 64 [2021-12-06 17:48:51,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:51,717 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3320 transitions. [2021-12-06 17:48:51,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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) [2021-12-06 17:48:51,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3320 transitions. [2021-12-06 17:48:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 17:48:51,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:51,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:51,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 17:48:51,718 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:51,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:51,718 INFO L85 PathProgramCache]: Analyzing trace with hash -747879712, now seen corresponding path program 1 times [2021-12-06 17:48:51,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:51,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910897504] [2021-12-06 17:48:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:51,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:51,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:51,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910897504] [2021-12-06 17:48:51,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910897504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:51,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:51,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:48:51,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424790005] [2021-12-06 17:48:51,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:51,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:48:51,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:51,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:48:51,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:48:51,760 INFO L87 Difference]: Start difference. First operand 2169 states and 3320 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-12-06 17:48:51,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:51,932 INFO L93 Difference]: Finished difference Result 4297 states and 6596 transitions. [2021-12-06 17:48:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:48:51,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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 65 [2021-12-06 17:48:51,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:51,942 INFO L225 Difference]: With dead ends: 4297 [2021-12-06 17:48:51,942 INFO L226 Difference]: Without dead ends: 2169 [2021-12-06 17:48:51,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:48:51,946 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 414 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:51,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 115 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-12-06 17:48:52,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 2169. [2021-12-06 17:48:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 1.5106088560885609) internal successors, (3275), 2168 states have internal predecessors, (3275), 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) [2021-12-06 17:48:52,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3275 transitions. [2021-12-06 17:48:52,064 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3275 transitions. Word has length 65 [2021-12-06 17:48:52,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:52,064 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3275 transitions. [2021-12-06 17:48:52,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-12-06 17:48:52,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3275 transitions. [2021-12-06 17:48:52,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 17:48:52,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:52,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:52,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 17:48:52,066 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:52,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:52,066 INFO L85 PathProgramCache]: Analyzing trace with hash 431205441, now seen corresponding path program 1 times [2021-12-06 17:48:52,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:52,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192918234] [2021-12-06 17:48:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:52,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:52,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:52,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192918234] [2021-12-06 17:48:52,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192918234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:52,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:52,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:48:52,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748368342] [2021-12-06 17:48:52,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:52,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:48:52,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:52,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:48:52,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:48:52,106 INFO L87 Difference]: Start difference. First operand 2169 states and 3275 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-12-06 17:48:52,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:52,287 INFO L93 Difference]: Finished difference Result 4305 states and 6516 transitions. [2021-12-06 17:48:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:48:52,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 66 [2021-12-06 17:48:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:52,297 INFO L225 Difference]: With dead ends: 4305 [2021-12-06 17:48:52,297 INFO L226 Difference]: Without dead ends: 2169 [2021-12-06 17:48:52,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:48:52,300 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 430 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:52,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 99 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:52,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-12-06 17:48:52,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 2169. [2021-12-06 17:48:52,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 1.4898523985239853) internal successors, (3230), 2168 states have internal predecessors, (3230), 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) [2021-12-06 17:48:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3230 transitions. [2021-12-06 17:48:52,449 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3230 transitions. Word has length 66 [2021-12-06 17:48:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:52,449 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3230 transitions. [2021-12-06 17:48:52,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-12-06 17:48:52,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3230 transitions. [2021-12-06 17:48:52,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 17:48:52,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:52,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:52,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 17:48:52,451 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:52,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1430381312, now seen corresponding path program 1 times [2021-12-06 17:48:52,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:52,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087820704] [2021-12-06 17:48:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:52,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:52,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:52,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087820704] [2021-12-06 17:48:52,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087820704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:52,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:52,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:48:52,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249271419] [2021-12-06 17:48:52,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:52,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:48:52,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:52,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:48:52,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:48:52,500 INFO L87 Difference]: Start difference. First operand 2169 states and 3230 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-12-06 17:48:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:52,681 INFO L93 Difference]: Finished difference Result 4301 states and 6422 transitions. [2021-12-06 17:48:52,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:48:52,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 67 [2021-12-06 17:48:52,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:52,690 INFO L225 Difference]: With dead ends: 4301 [2021-12-06 17:48:52,691 INFO L226 Difference]: Without dead ends: 2169 [2021-12-06 17:48:52,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:48:52,693 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 412 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:52,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 107 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:52,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-12-06 17:48:52,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 2169. [2021-12-06 17:48:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 1.4690959409594095) internal successors, (3185), 2168 states have internal predecessors, (3185), 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) [2021-12-06 17:48:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3185 transitions. [2021-12-06 17:48:52,807 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3185 transitions. Word has length 67 [2021-12-06 17:48:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:52,807 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3185 transitions. [2021-12-06 17:48:52,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-12-06 17:48:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3185 transitions. [2021-12-06 17:48:52,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 17:48:52,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:52,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:52,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 17:48:52,808 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:52,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:52,809 INFO L85 PathProgramCache]: Analyzing trace with hash -654863315, now seen corresponding path program 1 times [2021-12-06 17:48:52,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:52,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415603133] [2021-12-06 17:48:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:52,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:52,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:52,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415603133] [2021-12-06 17:48:52,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415603133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:52,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:52,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 17:48:52,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068921878] [2021-12-06 17:48:52,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:52,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:48:52,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:52,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:48:52,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:48:52,917 INFO L87 Difference]: Start difference. First operand 2169 states and 3185 transitions. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 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) [2021-12-06 17:48:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:53,416 INFO L93 Difference]: Finished difference Result 6250 states and 9205 transitions. [2021-12-06 17:48:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:48:53,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 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 68 [2021-12-06 17:48:53,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:53,433 INFO L225 Difference]: With dead ends: 6250 [2021-12-06 17:48:53,433 INFO L226 Difference]: Without dead ends: 4194 [2021-12-06 17:48:53,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:48:53,436 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 970 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:53,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 259 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:48:53,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-12-06 17:48:53,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 2169. [2021-12-06 17:48:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 1.4686346863468636) internal successors, (3184), 2168 states have internal predecessors, (3184), 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) [2021-12-06 17:48:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3184 transitions. [2021-12-06 17:48:53,620 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3184 transitions. Word has length 68 [2021-12-06 17:48:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:53,621 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3184 transitions. [2021-12-06 17:48:53,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 8 states have internal predecessors, (68), 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) [2021-12-06 17:48:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3184 transitions. [2021-12-06 17:48:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 17:48:53,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:53,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:53,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 17:48:53,622 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:53,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:53,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1389072061, now seen corresponding path program 1 times [2021-12-06 17:48:53,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:53,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15027616] [2021-12-06 17:48:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:53,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:53,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:53,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15027616] [2021-12-06 17:48:53,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15027616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:53,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:53,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 17:48:53,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444896566] [2021-12-06 17:48:53,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:53,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:48:53,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:53,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:48:53,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:48:53,751 INFO L87 Difference]: Start difference. First operand 2169 states and 3184 transitions. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 9 states have internal predecessors, (69), 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) [2021-12-06 17:48:54,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:54,379 INFO L93 Difference]: Finished difference Result 4687 states and 6862 transitions. [2021-12-06 17:48:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:48:54,380 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 9 states have internal predecessors, (69), 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 69 [2021-12-06 17:48:54,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:54,389 INFO L225 Difference]: With dead ends: 4687 [2021-12-06 17:48:54,389 INFO L226 Difference]: Without dead ends: 2617 [2021-12-06 17:48:54,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:48:54,392 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1042 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:54,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1042 Valid, 456 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:48:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2021-12-06 17:48:54,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 2169. [2021-12-06 17:48:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 1.4672509225092252) internal successors, (3181), 2168 states have internal predecessors, (3181), 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) [2021-12-06 17:48:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3181 transitions. [2021-12-06 17:48:54,589 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3181 transitions. Word has length 69 [2021-12-06 17:48:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:54,589 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3181 transitions. [2021-12-06 17:48:54,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 9 states have internal predecessors, (69), 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) [2021-12-06 17:48:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3181 transitions. [2021-12-06 17:48:54,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 17:48:54,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:54,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:54,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 17:48:54,591 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:54,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:54,592 INFO L85 PathProgramCache]: Analyzing trace with hash 770281693, now seen corresponding path program 1 times [2021-12-06 17:48:54,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:54,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860656965] [2021-12-06 17:48:54,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:54,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:54,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:54,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860656965] [2021-12-06 17:48:54,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860656965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:54,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:54,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 17:48:54,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435723474] [2021-12-06 17:48:54,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:54,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:48:54,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:54,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:48:54,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:48:54,716 INFO L87 Difference]: Start difference. First operand 2169 states and 3181 transitions. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 9 states have internal predecessors, (69), 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) [2021-12-06 17:48:55,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:55,465 INFO L93 Difference]: Finished difference Result 6337 states and 9285 transitions. [2021-12-06 17:48:55,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:48:55,466 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 9 states have internal predecessors, (69), 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 69 [2021-12-06 17:48:55,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:55,482 INFO L225 Difference]: With dead ends: 6337 [2021-12-06 17:48:55,483 INFO L226 Difference]: Without dead ends: 4312 [2021-12-06 17:48:55,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:48:55,485 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 890 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:55,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 309 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:48:55,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-12-06 17:48:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 2169. [2021-12-06 17:48:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 1.46309963099631) internal successors, (3172), 2168 states have internal predecessors, (3172), 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) [2021-12-06 17:48:55,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3172 transitions. [2021-12-06 17:48:55,686 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3172 transitions. Word has length 69 [2021-12-06 17:48:55,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:55,686 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3172 transitions. [2021-12-06 17:48:55,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 9 states have internal predecessors, (69), 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) [2021-12-06 17:48:55,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3172 transitions. [2021-12-06 17:48:55,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 17:48:55,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:55,687 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:55,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 17:48:55,687 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:55,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash -751317883, now seen corresponding path program 1 times [2021-12-06 17:48:55,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:55,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830069541] [2021-12-06 17:48:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:55,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:55,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:55,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830069541] [2021-12-06 17:48:55,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830069541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:55,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:55,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 17:48:55,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092874347] [2021-12-06 17:48:55,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:55,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:48:55,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:55,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:48:55,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:48:55,784 INFO L87 Difference]: Start difference. First operand 2169 states and 3172 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 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) [2021-12-06 17:48:56,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:56,514 INFO L93 Difference]: Finished difference Result 6382 states and 9336 transitions. [2021-12-06 17:48:56,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:48:56,515 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 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 70 [2021-12-06 17:48:56,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:56,524 INFO L225 Difference]: With dead ends: 6382 [2021-12-06 17:48:56,525 INFO L226 Difference]: Without dead ends: 4327 [2021-12-06 17:48:56,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:48:56,527 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 676 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:56,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 448 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:48:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4327 states. [2021-12-06 17:48:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4327 to 2169. [2021-12-06 17:48:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 1.4603321033210332) internal successors, (3166), 2168 states have internal predecessors, (3166), 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) [2021-12-06 17:48:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3166 transitions. [2021-12-06 17:48:56,773 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3166 transitions. Word has length 70 [2021-12-06 17:48:56,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:56,773 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3166 transitions. [2021-12-06 17:48:56,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 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) [2021-12-06 17:48:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3166 transitions. [2021-12-06 17:48:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 17:48:56,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:56,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:56,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 17:48:56,774 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:56,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:56,774 INFO L85 PathProgramCache]: Analyzing trace with hash -425050317, now seen corresponding path program 1 times [2021-12-06 17:48:56,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:56,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223442384] [2021-12-06 17:48:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:56,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:57,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:57,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223442384] [2021-12-06 17:48:57,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223442384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:57,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:57,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 17:48:57,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814995027] [2021-12-06 17:48:57,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:57,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:48:57,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:57,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:48:57,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:48:57,031 INFO L87 Difference]: Start difference. First operand 2169 states and 3166 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 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) [2021-12-06 17:48:58,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:58,845 INFO L93 Difference]: Finished difference Result 9054 states and 13311 transitions. [2021-12-06 17:48:58,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:48:58,846 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 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 71 [2021-12-06 17:48:58,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:58,856 INFO L225 Difference]: With dead ends: 9054 [2021-12-06 17:48:58,856 INFO L226 Difference]: Without dead ends: 8296 [2021-12-06 17:48:58,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-06 17:48:58,859 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 877 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:58,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 1759 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:48:58,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8296 states. [2021-12-06 17:48:59,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8296 to 2152. [2021-12-06 17:48:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 1.4583914458391445) internal successors, (3137), 2151 states have internal predecessors, (3137), 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) [2021-12-06 17:48:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3137 transitions. [2021-12-06 17:48:59,197 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3137 transitions. Word has length 71 [2021-12-06 17:48:59,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:59,198 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 3137 transitions. [2021-12-06 17:48:59,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 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) [2021-12-06 17:48:59,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3137 transitions. [2021-12-06 17:48:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 17:48:59,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:59,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:59,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 17:48:59,199 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:48:59,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:59,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1932415602, now seen corresponding path program 1 times [2021-12-06 17:48:59,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:59,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024656907] [2021-12-06 17:48:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:59,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:59,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:59,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024656907] [2021-12-06 17:48:59,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024656907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:48:59,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:48:59,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-06 17:48:59,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891882499] [2021-12-06 17:48:59,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:48:59,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 17:48:59,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:59,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 17:48:59,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:48:59,440 INFO L87 Difference]: Start difference. First operand 2152 states and 3137 transitions. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 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) [2021-12-06 17:49:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:01,738 INFO L93 Difference]: Finished difference Result 8939 states and 13152 transitions. [2021-12-06 17:49:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:49:01,739 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 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 71 [2021-12-06 17:49:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:01,750 INFO L225 Difference]: With dead ends: 8939 [2021-12-06 17:49:01,751 INFO L226 Difference]: Without dead ends: 8178 [2021-12-06 17:49:01,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-12-06 17:49:01,754 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 1225 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:01,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1225 Valid, 1098 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:49:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8178 states. [2021-12-06 17:49:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8178 to 2126. [2021-12-06 17:49:02,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 1.4597647058823529) internal successors, (3102), 2125 states have internal predecessors, (3102), 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) [2021-12-06 17:49:02,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 3102 transitions. [2021-12-06 17:49:02,207 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 3102 transitions. Word has length 71 [2021-12-06 17:49:02,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:02,208 INFO L470 AbstractCegarLoop]: Abstraction has 2126 states and 3102 transitions. [2021-12-06 17:49:02,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 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) [2021-12-06 17:49:02,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 3102 transitions. [2021-12-06 17:49:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 17:49:02,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:02,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:02,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 17:49:02,209 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:02,209 INFO L85 PathProgramCache]: Analyzing trace with hash -187976173, now seen corresponding path program 1 times [2021-12-06 17:49:02,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:02,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458345134] [2021-12-06 17:49:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:02,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:02,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:02,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458345134] [2021-12-06 17:49:02,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458345134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:49:02,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:49:02,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 17:49:02,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500525361] [2021-12-06 17:49:02,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:49:02,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 17:49:02,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:02,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 17:49:02,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:49:02,490 INFO L87 Difference]: Start difference. First operand 2126 states and 3102 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 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) [2021-12-06 17:49:06,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:06,460 INFO L93 Difference]: Finished difference Result 12972 states and 19102 transitions. [2021-12-06 17:49:06,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 17:49:06,461 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 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 71 [2021-12-06 17:49:06,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:06,476 INFO L225 Difference]: With dead ends: 12972 [2021-12-06 17:49:06,476 INFO L226 Difference]: Without dead ends: 12234 [2021-12-06 17:49:06,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-12-06 17:49:06,479 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 1029 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 2573 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:06,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1029 Valid, 2573 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:49:06,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12234 states. [2021-12-06 17:49:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12234 to 2122. [2021-12-06 17:49:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2121 states have (on average 1.4587458745874586) internal successors, (3094), 2121 states have internal predecessors, (3094), 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) [2021-12-06 17:49:07,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 3094 transitions. [2021-12-06 17:49:07,086 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 3094 transitions. Word has length 71 [2021-12-06 17:49:07,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:07,086 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 3094 transitions. [2021-12-06 17:49:07,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 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) [2021-12-06 17:49:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 3094 transitions. [2021-12-06 17:49:07,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 17:49:07,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:07,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:07,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 17:49:07,087 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:07,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:07,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1545437633, now seen corresponding path program 1 times [2021-12-06 17:49:07,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:07,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122569065] [2021-12-06 17:49:07,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:07,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:07,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:07,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122569065] [2021-12-06 17:49:07,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122569065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:49:07,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:49:07,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:49:07,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331493966] [2021-12-06 17:49:07,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:49:07,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:49:07,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:07,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:49:07,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:49:07,141 INFO L87 Difference]: Start difference. First operand 2122 states and 3094 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2021-12-06 17:49:07,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:07,907 INFO L93 Difference]: Finished difference Result 4942 states and 7261 transitions. [2021-12-06 17:49:07,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:49:07,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 72 [2021-12-06 17:49:07,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:07,910 INFO L225 Difference]: With dead ends: 4942 [2021-12-06 17:49:07,910 INFO L226 Difference]: Without dead ends: 2926 [2021-12-06 17:49:07,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:49:07,912 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 73 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:07,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 356 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:49:07,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-12-06 17:49:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2906. [2021-12-06 17:49:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2906 states, 2905 states have (on average 1.453012048192771) internal successors, (4221), 2905 states have internal predecessors, (4221), 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) [2021-12-06 17:49:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4221 transitions. [2021-12-06 17:49:08,697 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 4221 transitions. Word has length 72 [2021-12-06 17:49:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:08,698 INFO L470 AbstractCegarLoop]: Abstraction has 2906 states and 4221 transitions. [2021-12-06 17:49:08,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2021-12-06 17:49:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 4221 transitions. [2021-12-06 17:49:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 17:49:08,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:08,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:08,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 17:49:08,699 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:08,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:08,699 INFO L85 PathProgramCache]: Analyzing trace with hash -654506813, now seen corresponding path program 1 times [2021-12-06 17:49:08,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:08,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782173091] [2021-12-06 17:49:08,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:08,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:08,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:08,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782173091] [2021-12-06 17:49:08,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782173091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:49:08,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:49:08,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:49:08,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111932638] [2021-12-06 17:49:08,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:49:08,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:49:08,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:08,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:49:08,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:49:08,743 INFO L87 Difference]: Start difference. First operand 2906 states and 4221 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2021-12-06 17:49:09,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:09,939 INFO L93 Difference]: Finished difference Result 4514 states and 6549 transitions. [2021-12-06 17:49:09,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:49:09,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 72 [2021-12-06 17:49:09,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:09,943 INFO L225 Difference]: With dead ends: 4514 [2021-12-06 17:49:09,943 INFO L226 Difference]: Without dead ends: 4512 [2021-12-06 17:49:09,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:49:09,944 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 142 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:09,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 607 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:49:09,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4512 states. [2021-12-06 17:49:10,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4512 to 2926. [2021-12-06 17:49:10,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2925 states have (on average 1.4423931623931623) internal successors, (4219), 2925 states have internal predecessors, (4219), 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) [2021-12-06 17:49:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 4219 transitions. [2021-12-06 17:49:10,711 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 4219 transitions. Word has length 72 [2021-12-06 17:49:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:10,712 INFO L470 AbstractCegarLoop]: Abstraction has 2926 states and 4219 transitions. [2021-12-06 17:49:10,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2021-12-06 17:49:10,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 4219 transitions. [2021-12-06 17:49:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 17:49:10,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:10,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:10,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 17:49:10,713 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:10,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1371390844, now seen corresponding path program 1 times [2021-12-06 17:49:10,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:10,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390136499] [2021-12-06 17:49:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:10,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:10,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:10,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390136499] [2021-12-06 17:49:10,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390136499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:49:10,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:49:10,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 17:49:10,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308525348] [2021-12-06 17:49:10,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:49:10,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:49:10,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:10,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:49:10,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:49:10,926 INFO L87 Difference]: Start difference. First operand 2926 states and 4219 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 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) [2021-12-06 17:49:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:13,043 INFO L93 Difference]: Finished difference Result 6858 states and 9932 transitions. [2021-12-06 17:49:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 17:49:13,044 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 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 72 [2021-12-06 17:49:13,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:13,048 INFO L225 Difference]: With dead ends: 6858 [2021-12-06 17:49:13,048 INFO L226 Difference]: Without dead ends: 5746 [2021-12-06 17:49:13,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-12-06 17:49:13,050 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 698 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:13,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 1085 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:49:13,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5746 states. [2021-12-06 17:49:13,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5746 to 2904. [2021-12-06 17:49:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 1.4436789528074405) internal successors, (4191), 2903 states have internal predecessors, (4191), 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) [2021-12-06 17:49:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 4191 transitions. [2021-12-06 17:49:13,923 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 4191 transitions. Word has length 72 [2021-12-06 17:49:13,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:13,923 INFO L470 AbstractCegarLoop]: Abstraction has 2904 states and 4191 transitions. [2021-12-06 17:49:13,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 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) [2021-12-06 17:49:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 4191 transitions. [2021-12-06 17:49:13,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 17:49:13,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:13,925 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:13,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 17:49:13,925 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:13,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:13,926 INFO L85 PathProgramCache]: Analyzing trace with hash 578501654, now seen corresponding path program 1 times [2021-12-06 17:49:13,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:13,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865712960] [2021-12-06 17:49:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:13,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:13,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:13,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865712960] [2021-12-06 17:49:13,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865712960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:49:13,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:49:13,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:49:13,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900997158] [2021-12-06 17:49:13,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:49:13,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:49:13,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:13,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:49:13,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:49:13,980 INFO L87 Difference]: Start difference. First operand 2904 states and 4191 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 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) [2021-12-06 17:49:17,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:17,873 INFO L93 Difference]: Finished difference Result 14556 states and 20963 transitions. [2021-12-06 17:49:17,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:49:17,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 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 97 [2021-12-06 17:49:17,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:17,884 INFO L225 Difference]: With dead ends: 14556 [2021-12-06 17:49:17,884 INFO L226 Difference]: Without dead ends: 11736 [2021-12-06 17:49:17,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:49:17,887 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 1089 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:17,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1089 Valid, 302 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:49:17,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11736 states. [2021-12-06 17:49:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11736 to 6342. [2021-12-06 17:49:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6342 states, 6341 states have (on average 1.4442516953161961) internal successors, (9158), 6341 states have internal predecessors, (9158), 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) [2021-12-06 17:49:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6342 states to 6342 states and 9158 transitions. [2021-12-06 17:49:19,813 INFO L78 Accepts]: Start accepts. Automaton has 6342 states and 9158 transitions. Word has length 97 [2021-12-06 17:49:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:19,813 INFO L470 AbstractCegarLoop]: Abstraction has 6342 states and 9158 transitions. [2021-12-06 17:49:19,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 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) [2021-12-06 17:49:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 6342 states and 9158 transitions. [2021-12-06 17:49:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 17:49:19,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:19,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:19,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 17:49:19,816 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:19,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1001070108, now seen corresponding path program 1 times [2021-12-06 17:49:19,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:19,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928912633] [2021-12-06 17:49:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:19,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:19,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:19,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928912633] [2021-12-06 17:49:19,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928912633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:49:19,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:49:19,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:49:19,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065157884] [2021-12-06 17:49:19,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:49:19,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:49:19,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:19,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:49:19,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:49:19,860 INFO L87 Difference]: Start difference. First operand 6342 states and 9158 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 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) [2021-12-06 17:49:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:26,719 INFO L93 Difference]: Finished difference Result 28590 states and 41320 transitions. [2021-12-06 17:49:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:49:26,720 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 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 97 [2021-12-06 17:49:26,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:26,740 INFO L225 Difference]: With dead ends: 28590 [2021-12-06 17:49:26,740 INFO L226 Difference]: Without dead ends: 22332 [2021-12-06 17:49:26,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:49:26,747 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1264 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:26,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1264 Valid, 296 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:49:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22332 states. [2021-12-06 17:49:30,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22332 to 13838. [2021-12-06 17:49:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13838 states, 13837 states have (on average 1.4425092144250922) internal successors, (19960), 13837 states have internal predecessors, (19960), 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) [2021-12-06 17:49:30,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13838 states to 13838 states and 19960 transitions. [2021-12-06 17:49:30,860 INFO L78 Accepts]: Start accepts. Automaton has 13838 states and 19960 transitions. Word has length 97 [2021-12-06 17:49:30,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:30,860 INFO L470 AbstractCegarLoop]: Abstraction has 13838 states and 19960 transitions. [2021-12-06 17:49:30,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 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) [2021-12-06 17:49:30,860 INFO L276 IsEmpty]: Start isEmpty. Operand 13838 states and 19960 transitions. [2021-12-06 17:49:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 17:49:30,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:30,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:30,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 17:49:30,862 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:30,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:30,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1832318814, now seen corresponding path program 1 times [2021-12-06 17:49:30,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:30,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907085123] [2021-12-06 17:49:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:30,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:30,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:30,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907085123] [2021-12-06 17:49:30,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907085123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:49:30,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:49:30,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:49:30,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65303247] [2021-12-06 17:49:30,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:49:30,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:49:30,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:30,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:49:30,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:49:30,917 INFO L87 Difference]: Start difference. First operand 13838 states and 19960 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 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) [2021-12-06 17:49:41,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:41,556 INFO L93 Difference]: Finished difference Result 49042 states and 70919 transitions. [2021-12-06 17:49:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:49:41,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 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 97 [2021-12-06 17:49:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:41,596 INFO L225 Difference]: With dead ends: 49042 [2021-12-06 17:49:41,596 INFO L226 Difference]: Without dead ends: 35288 [2021-12-06 17:49:41,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:49:41,612 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 1001 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:41,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1001 Valid, 372 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:49:41,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35288 states. [2021-12-06 17:49:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35288 to 21218. [2021-12-06 17:49:47,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21218 states, 21217 states have (on average 1.4466229909977848) internal successors, (30693), 21217 states have internal predecessors, (30693), 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) [2021-12-06 17:49:48,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21218 states to 21218 states and 30693 transitions. [2021-12-06 17:49:48,016 INFO L78 Accepts]: Start accepts. Automaton has 21218 states and 30693 transitions. Word has length 97 [2021-12-06 17:49:48,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:49:48,016 INFO L470 AbstractCegarLoop]: Abstraction has 21218 states and 30693 transitions. [2021-12-06 17:49:48,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 6 states have internal predecessors, (97), 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) [2021-12-06 17:49:48,017 INFO L276 IsEmpty]: Start isEmpty. Operand 21218 states and 30693 transitions. [2021-12-06 17:49:48,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 17:49:48,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:49:48,018 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:49:48,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 17:49:48,019 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:49:48,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:49:48,019 INFO L85 PathProgramCache]: Analyzing trace with hash 909226558, now seen corresponding path program 1 times [2021-12-06 17:49:48,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:49:48,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56382920] [2021-12-06 17:49:48,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:49:48,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:49:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:49:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:49:48,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:49:48,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56382920] [2021-12-06 17:49:48,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56382920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:49:48,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:49:48,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:49:48,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072659033] [2021-12-06 17:49:48,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:49:48,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:49:48,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:49:48,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:49:48,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:49:48,048 INFO L87 Difference]: Start difference. First operand 21218 states and 30693 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-12-06 17:49:54,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:49:54,121 INFO L93 Difference]: Finished difference Result 37494 states and 54279 transitions. [2021-12-06 17:49:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:49:54,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2021-12-06 17:49:54,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:49:54,140 INFO L225 Difference]: With dead ends: 37494 [2021-12-06 17:49:54,141 INFO L226 Difference]: Without dead ends: 20250 [2021-12-06 17:49:54,153 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 [2021-12-06 17:49:54,154 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 66 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:49:54,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 322 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:49:54,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20250 states. [2021-12-06 17:50:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20250 to 20248. [2021-12-06 17:50:00,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20248 states, 20247 states have (on average 1.4331505902108954) internal successors, (29017), 20247 states have internal predecessors, (29017), 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) [2021-12-06 17:50:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20248 states to 20248 states and 29017 transitions. [2021-12-06 17:50:00,148 INFO L78 Accepts]: Start accepts. Automaton has 20248 states and 29017 transitions. Word has length 97 [2021-12-06 17:50:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:00,148 INFO L470 AbstractCegarLoop]: Abstraction has 20248 states and 29017 transitions. [2021-12-06 17:50:00,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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) [2021-12-06 17:50:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand 20248 states and 29017 transitions. [2021-12-06 17:50:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 17:50:00,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:00,152 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:00,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 17:50:00,152 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:00,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:00,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1634569540, now seen corresponding path program 1 times [2021-12-06 17:50:00,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:00,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390225020] [2021-12-06 17:50:00,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:00,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 17:50:00,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:00,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390225020] [2021-12-06 17:50:00,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390225020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:00,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:00,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:50:00,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804884196] [2021-12-06 17:50:00,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:00,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:50:00,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:00,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:50:00,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:50:00,184 INFO L87 Difference]: Start difference. First operand 20248 states and 29017 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-12-06 17:50:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:05,742 INFO L93 Difference]: Finished difference Result 38604 states and 55199 transitions. [2021-12-06 17:50:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:50:05,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 121 [2021-12-06 17:50:05,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:05,760 INFO L225 Difference]: With dead ends: 38604 [2021-12-06 17:50:05,760 INFO L226 Difference]: Without dead ends: 18468 [2021-12-06 17:50:05,770 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 [2021-12-06 17:50:05,770 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 62 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:05,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 316 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:50:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18468 states. [2021-12-06 17:50:11,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18468 to 17926. [2021-12-06 17:50:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17926 states, 17925 states have (on average 1.4154532775453277) internal successors, (25372), 17925 states have internal predecessors, (25372), 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) [2021-12-06 17:50:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17926 states to 17926 states and 25372 transitions. [2021-12-06 17:50:11,276 INFO L78 Accepts]: Start accepts. Automaton has 17926 states and 25372 transitions. Word has length 121 [2021-12-06 17:50:11,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:11,276 INFO L470 AbstractCegarLoop]: Abstraction has 17926 states and 25372 transitions. [2021-12-06 17:50:11,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2021-12-06 17:50:11,276 INFO L276 IsEmpty]: Start isEmpty. Operand 17926 states and 25372 transitions. [2021-12-06 17:50:11,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-06 17:50:11,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:11,279 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:11,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 17:50:11,279 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:11,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:11,280 INFO L85 PathProgramCache]: Analyzing trace with hash 264130244, now seen corresponding path program 1 times [2021-12-06 17:50:11,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:11,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840828035] [2021-12-06 17:50:11,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:11,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 17:50:11,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:11,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840828035] [2021-12-06 17:50:11,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840828035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:11,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:11,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:50:11,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855488995] [2021-12-06 17:50:11,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:11,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:50:11,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:11,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:50:11,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:50:11,312 INFO L87 Difference]: Start difference. First operand 17926 states and 25372 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2021-12-06 17:50:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:16,415 INFO L93 Difference]: Finished difference Result 33990 states and 47950 transitions. [2021-12-06 17:50:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:50:16,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 122 [2021-12-06 17:50:16,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:16,431 INFO L225 Difference]: With dead ends: 33990 [2021-12-06 17:50:16,431 INFO L226 Difference]: Without dead ends: 16164 [2021-12-06 17:50:16,442 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 [2021-12-06 17:50:16,443 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 55 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:16,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 316 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:50:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16164 states. [2021-12-06 17:50:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16164 to 15658. [2021-12-06 17:50:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15658 states, 15657 states have (on average 1.3951587149517788) internal successors, (21844), 15657 states have internal predecessors, (21844), 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) [2021-12-06 17:50:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15658 states to 15658 states and 21844 transitions. [2021-12-06 17:50:21,404 INFO L78 Accepts]: Start accepts. Automaton has 15658 states and 21844 transitions. Word has length 122 [2021-12-06 17:50:21,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:21,405 INFO L470 AbstractCegarLoop]: Abstraction has 15658 states and 21844 transitions. [2021-12-06 17:50:21,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2021-12-06 17:50:21,405 INFO L276 IsEmpty]: Start isEmpty. Operand 15658 states and 21844 transitions. [2021-12-06 17:50:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 17:50:21,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:21,407 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:21,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 17:50:21,407 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:21,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:21,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1753192703, now seen corresponding path program 1 times [2021-12-06 17:50:21,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:21,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818422342] [2021-12-06 17:50:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:21,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:50:21,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:21,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818422342] [2021-12-06 17:50:21,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818422342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:21,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:21,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:50:21,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274608258] [2021-12-06 17:50:21,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:21,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:50:21,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:21,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:50:21,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:50:21,439 INFO L87 Difference]: Start difference. First operand 15658 states and 21844 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2021-12-06 17:50:30,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:30,899 INFO L93 Difference]: Finished difference Result 44926 states and 62294 transitions. [2021-12-06 17:50:30,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:50:30,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 123 [2021-12-06 17:50:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:30,930 INFO L225 Difference]: With dead ends: 44926 [2021-12-06 17:50:30,930 INFO L226 Difference]: Without dead ends: 29368 [2021-12-06 17:50:30,940 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 [2021-12-06 17:50:30,941 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 48 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:30,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 318 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:50:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29368 states. [2021-12-06 17:50:39,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29368 to 27014. [2021-12-06 17:50:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27014 states, 27013 states have (on average 1.3769666456891128) internal successors, (37196), 27013 states have internal predecessors, (37196), 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) [2021-12-06 17:50:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27014 states to 27014 states and 37196 transitions. [2021-12-06 17:50:39,760 INFO L78 Accepts]: Start accepts. Automaton has 27014 states and 37196 transitions. Word has length 123 [2021-12-06 17:50:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:39,760 INFO L470 AbstractCegarLoop]: Abstraction has 27014 states and 37196 transitions. [2021-12-06 17:50:39,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2021-12-06 17:50:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 27014 states and 37196 transitions. [2021-12-06 17:50:39,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 17:50:39,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:39,763 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:39,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 17:50:39,763 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:39,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1550175903, now seen corresponding path program 1 times [2021-12-06 17:50:39,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:39,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920331856] [2021-12-06 17:50:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:39,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:39,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:39,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920331856] [2021-12-06 17:50:39,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920331856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:39,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:39,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:50:39,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107228847] [2021-12-06 17:50:39,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:39,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:50:39,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:39,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:50:39,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:50:39,796 INFO L87 Difference]: Start difference. First operand 27014 states and 37196 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2021-12-06 17:50:46,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:46,712 INFO L93 Difference]: Finished difference Result 47218 states and 64817 transitions. [2021-12-06 17:50:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:50:46,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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 124 [2021-12-06 17:50:46,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:46,732 INFO L225 Difference]: With dead ends: 47218 [2021-12-06 17:50:46,732 INFO L226 Difference]: Without dead ends: 20304 [2021-12-06 17:50:46,743 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 [2021-12-06 17:50:46,744 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 69 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:46,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 295 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:50:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20304 states. [2021-12-06 17:50:53,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20304 to 19966. [2021-12-06 17:50:53,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19966 states, 19965 states have (on average 1.350212872526922) internal successors, (26957), 19965 states have internal predecessors, (26957), 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) [2021-12-06 17:50:53,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19966 states to 19966 states and 26957 transitions. [2021-12-06 17:50:53,531 INFO L78 Accepts]: Start accepts. Automaton has 19966 states and 26957 transitions. Word has length 124 [2021-12-06 17:50:53,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:53,531 INFO L470 AbstractCegarLoop]: Abstraction has 19966 states and 26957 transitions. [2021-12-06 17:50:53,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2021-12-06 17:50:53,532 INFO L276 IsEmpty]: Start isEmpty. Operand 19966 states and 26957 transitions. [2021-12-06 17:50:53,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 17:50:53,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:53,534 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:50:53,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 17:50:53,534 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:53,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:53,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1219450999, now seen corresponding path program 1 times [2021-12-06 17:50:53,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:53,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017025878] [2021-12-06 17:50:53,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:53,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:53,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:53,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017025878] [2021-12-06 17:50:53,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017025878] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:53,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094298386] [2021-12-06 17:50:53,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:53,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:53,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:53,668 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:53,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:50:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:53,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:50:53,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:50:54,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:50:55,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094298386] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:55,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:55,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 18 [2021-12-06 17:50:55,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31236755] [2021-12-06 17:50:55,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:55,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 17:50:55,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:55,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:50:55,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:50:55,040 INFO L87 Difference]: Start difference. First operand 19966 states and 26957 transitions. Second operand has 18 states, 18 states have (on average 19.22222222222222) internal successors, (346), 18 states have internal predecessors, (346), 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) [2021-12-06 17:51:04,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:04,963 INFO L93 Difference]: Finished difference Result 43556 states and 58570 transitions. [2021-12-06 17:51:04,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 17:51:04,964 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.22222222222222) internal successors, (346), 18 states have internal predecessors, (346), 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 124 [2021-12-06 17:51:04,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:04,987 INFO L225 Difference]: With dead ends: 43556 [2021-12-06 17:51:04,987 INFO L226 Difference]: Without dead ends: 23754 [2021-12-06 17:51:04,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 17:51:05,000 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 1232 mSDsluCounter, 1553 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:05,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1232 Valid, 1690 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 928 Invalid, 0 Unknown, 187 Unchecked, 0.6s Time] [2021-12-06 17:51:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23754 states. [2021-12-06 17:51:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23754 to 22714. [2021-12-06 17:51:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22714 states, 22713 states have (on average 1.3310438955664157) internal successors, (30232), 22713 states have internal predecessors, (30232), 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) [2021-12-06 17:51:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22714 states to 22714 states and 30232 transitions. [2021-12-06 17:51:12,979 INFO L78 Accepts]: Start accepts. Automaton has 22714 states and 30232 transitions. Word has length 124 [2021-12-06 17:51:12,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:12,980 INFO L470 AbstractCegarLoop]: Abstraction has 22714 states and 30232 transitions. [2021-12-06 17:51:12,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.22222222222222) internal successors, (346), 18 states have internal predecessors, (346), 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) [2021-12-06 17:51:12,980 INFO L276 IsEmpty]: Start isEmpty. Operand 22714 states and 30232 transitions. [2021-12-06 17:51:12,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 17:51:12,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:12,982 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:13,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:51:13,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:13,184 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:13,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:13,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1105261614, now seen corresponding path program 1 times [2021-12-06 17:51:13,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:13,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263757701] [2021-12-06 17:51:13,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:13,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:13,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:13,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263757701] [2021-12-06 17:51:13,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263757701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:13,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223030209] [2021-12-06 17:51:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:13,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:13,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:13,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:13,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:51:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:13,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:51:13,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:51:14,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 17:51:14,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223030209] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:14,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:14,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 20 [2021-12-06 17:51:14,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610366287] [2021-12-06 17:51:14,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:14,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 17:51:14,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:14,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 17:51:14,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-12-06 17:51:14,424 INFO L87 Difference]: Start difference. First operand 22714 states and 30232 transitions. Second operand has 20 states, 20 states have (on average 17.45) internal successors, (349), 20 states have internal predecessors, (349), 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) [2021-12-06 17:51:30,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:30,510 INFO L93 Difference]: Finished difference Result 56004 states and 74164 transitions. [2021-12-06 17:51:30,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 17:51:30,511 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 17.45) internal successors, (349), 20 states have internal predecessors, (349), 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 125 [2021-12-06 17:51:30,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:30,546 INFO L225 Difference]: With dead ends: 56004 [2021-12-06 17:51:30,546 INFO L226 Difference]: Without dead ends: 34990 [2021-12-06 17:51:30,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=656, Invalid=3504, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 17:51:30,561 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 1492 mSDsluCounter, 2222 mSDsCounter, 0 mSdLazyCounter, 1963 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 2495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:30,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1492 Valid, 2385 Invalid, 2495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1963 Invalid, 0 Unknown, 432 Unchecked, 1.2s Time] [2021-12-06 17:51:30,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34990 states. [2021-12-06 17:51:39,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34990 to 25386. [2021-12-06 17:51:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25386 states, 25385 states have (on average 1.334291904668111) internal successors, (33871), 25385 states have internal predecessors, (33871), 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) [2021-12-06 17:51:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25386 states to 25386 states and 33871 transitions. [2021-12-06 17:51:39,990 INFO L78 Accepts]: Start accepts. Automaton has 25386 states and 33871 transitions. Word has length 125 [2021-12-06 17:51:39,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:39,990 INFO L470 AbstractCegarLoop]: Abstraction has 25386 states and 33871 transitions. [2021-12-06 17:51:39,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 17.45) internal successors, (349), 20 states have internal predecessors, (349), 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) [2021-12-06 17:51:39,991 INFO L276 IsEmpty]: Start isEmpty. Operand 25386 states and 33871 transitions. [2021-12-06 17:51:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 17:51:39,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:39,994 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:40,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:51:40,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:40,195 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:40,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:40,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1753365789, now seen corresponding path program 1 times [2021-12-06 17:51:40,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:40,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861011338] [2021-12-06 17:51:40,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:40,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:40,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:40,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861011338] [2021-12-06 17:51:40,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861011338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:51:40,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950536106] [2021-12-06 17:51:40,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:40,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:51:40,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:51:40,358 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:51:40,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:51:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 17:51:40,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:51:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:41,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:51:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:44,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950536106] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:51:44,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:51:44,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 40 [2021-12-06 17:51:44,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736230889] [2021-12-06 17:51:44,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:51:44,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 17:51:44,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:44,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 17:51:44,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 17:51:44,693 INFO L87 Difference]: Start difference. First operand 25386 states and 33871 transitions. Second operand has 41 states, 41 states have (on average 8.487804878048781) internal successors, (348), 40 states have internal predecessors, (348), 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) [2021-12-06 17:59:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:50,869 INFO L93 Difference]: Finished difference Result 593510 states and 773379 transitions. [2021-12-06 17:59:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1141 states. [2021-12-06 17:59:50,870 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 8.487804878048781) internal successors, (348), 40 states have internal predecessors, (348), 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 125 [2021-12-06 17:59:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:51,926 INFO L225 Difference]: With dead ends: 593510 [2021-12-06 17:59:51,926 INFO L226 Difference]: Without dead ends: 569776 [2021-12-06 17:59:52,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1398 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 1178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645966 ImplicationChecksByTransitivity, 209.7s TimeCoverageRelationStatistics Valid=98801, Invalid=1292419, Unknown=0, NotChecked=0, Total=1391220 [2021-12-06 17:59:52,292 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 9422 mSDsluCounter, 7449 mSDsCounter, 0 mSdLazyCounter, 11637 mSolverCounterSat, 824 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9422 SdHoareTripleChecker+Valid, 7799 SdHoareTripleChecker+Invalid, 12461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 824 IncrementalHoareTripleChecker+Valid, 11637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:52,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9422 Valid, 7799 Invalid, 12461 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [824 Valid, 11637 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time] [2021-12-06 17:59:52,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569776 states. [2021-12-06 18:00:39,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569776 to 96649. [2021-12-06 18:00:39,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96649 states, 96648 states have (on average 1.327880556245344) internal successors, (128337), 96648 states have internal predecessors, (128337), 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) [2021-12-06 18:00:40,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96649 states to 96649 states and 128337 transitions. [2021-12-06 18:00:40,017 INFO L78 Accepts]: Start accepts. Automaton has 96649 states and 128337 transitions. Word has length 125 [2021-12-06 18:00:40,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:40,017 INFO L470 AbstractCegarLoop]: Abstraction has 96649 states and 128337 transitions. [2021-12-06 18:00:40,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 8.487804878048781) internal successors, (348), 40 states have internal predecessors, (348), 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) [2021-12-06 18:00:40,017 INFO L276 IsEmpty]: Start isEmpty. Operand 96649 states and 128337 transitions. [2021-12-06 18:00:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 18:00:40,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:40,027 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:40,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:00:40,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 18:00:40,228 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:40,229 INFO L85 PathProgramCache]: Analyzing trace with hash 564895377, now seen corresponding path program 1 times [2021-12-06 18:00:40,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:40,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258934092] [2021-12-06 18:00:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:40,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:40,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:40,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258934092] [2021-12-06 18:00:40,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258934092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:00:40,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368689726] [2021-12-06 18:00:40,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:40,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:40,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:40,370 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:00:40,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd4be2e-5171-4c4b-87b3-345b746a235b/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:00:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:40,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 18:00:40,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:08,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:01:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:10,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368689726] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:01:10,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:01:10,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2021-12-06 18:01:10,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274880525] [2021-12-06 18:01:10,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:01:10,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 18:01:10,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:01:10,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 18:01:10,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=821, Unknown=13, NotChecked=0, Total=930 [2021-12-06 18:01:10,279 INFO L87 Difference]: Start difference. First operand 96649 states and 128337 transitions. Second operand has 31 states, 31 states have (on average 10.709677419354838) internal successors, (332), 30 states have internal predecessors, (332), 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)