./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.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_b973827d-bc10-4201-8def-5e2e221989e7/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/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_b973827d-bc10-4201-8def-5e2e221989e7/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/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_b973827d-bc10-4201-8def-5e2e221989e7/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 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:59:35,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:59:35,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:59:35,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:59:35,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:59:35,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:59:35,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:59:35,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:59:35,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:59:35,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:59:35,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:59:35,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:59:35,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:59:35,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:59:35,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:59:35,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:59:35,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:59:35,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:59:35,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:59:35,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:59:35,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:59:35,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:59:35,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:59:35,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:59:35,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:59:35,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:59:35,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:59:35,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:59:35,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:59:35,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:59:35,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:59:35,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:59:35,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:59:35,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:59:35,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:59:35,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:59:35,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:59:35,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:59:35,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:59:35,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:59:35,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:59:35,594 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:59:35,616 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:59:35,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:59:35,617 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:59:35,617 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:59:35,617 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:59:35,617 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:59:35,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:59:35,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:59:35,618 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:59:35,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:59:35,618 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:59:35,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:59:35,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:59:35,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:59:35,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:59:35,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:59:35,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:59:35,620 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:59:35,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:59:35,620 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:59:35,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:59:35,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:59:35,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:59:35,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:59:35,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:59:35,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:59:35,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:59:35,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:59:35,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:59:35,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:59:35,621 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:59:35,621 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:59:35,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:59:35,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:59:35,622 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_b973827d-bc10-4201-8def-5e2e221989e7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd [2021-12-06 20:59:35,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:59:35,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:59:35,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:59:35,828 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:59:35,829 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:59:35,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-12-06 20:59:35,870 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/bin/uautomizer-DrprNOufMa/data/be5c2805f/c08de6f3fc224d138483436efd2e4b4e/FLAGcf40126a9 [2021-12-06 20:59:36,325 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:59:36,325 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-12-06 20:59:36,339 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/bin/uautomizer-DrprNOufMa/data/be5c2805f/c08de6f3fc224d138483436efd2e4b4e/FLAGcf40126a9 [2021-12-06 20:59:36,854 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/bin/uautomizer-DrprNOufMa/data/be5c2805f/c08de6f3fc224d138483436efd2e4b4e [2021-12-06 20:59:36,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:59:36,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:59:36,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:59:36,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:59:36,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:59:36,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:59:36" (1/1) ... [2021-12-06 20:59:36,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1383fd82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:59:36, skipping insertion in model container [2021-12-06 20:59:36,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:59:36" (1/1) ... [2021-12-06 20:59:36,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:59:36,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:59:37,136 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_b973827d-bc10-4201-8def-5e2e221989e7/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-12-06 20:59:37,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:59:37,152 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:59:37,221 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_b973827d-bc10-4201-8def-5e2e221989e7/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c[73311,73324] [2021-12-06 20:59:37,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:59:37,235 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:59:37,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:59:37 WrapperNode [2021-12-06 20:59:37,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:59:37,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:59:37,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:59:37,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:59:37,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:59:37" (1/1) ... [2021-12-06 20:59:37,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:59:37" (1/1) ... [2021-12-06 20:59:37,307 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 787 [2021-12-06 20:59:37,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:59:37,308 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:59:37,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:59:37,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:59:37,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:59:37" (1/1) ... [2021-12-06 20:59:37,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:59:37" (1/1) ... [2021-12-06 20:59:37,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:59:37" (1/1) ... [2021-12-06 20:59:37,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:59:37" (1/1) ... [2021-12-06 20:59:37,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:59:37" (1/1) ... [2021-12-06 20:59:37,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:59:37" (1/1) ... [2021-12-06 20:59:37,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:59:37" (1/1) ... [2021-12-06 20:59:37,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:59:37,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:59:37,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:59:37,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:59:37,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:59:37" (1/1) ... [2021-12-06 20:59:37,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:59:37,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:59:37,426 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:59:37,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:59:37,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:59:37,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 20:59:37,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 20:59:37,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 20:59:37,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 20:59:37,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:59:37,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 20:59:37,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:59:37,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:59:37,564 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:59:37,566 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:59:37,581 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 20:59:40,095 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-06 20:59:40,095 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-06 20:59:40,095 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:59:40,103 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:59:40,103 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 20:59:40,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:59:40 BoogieIcfgContainer [2021-12-06 20:59:40,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:59:40,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:59:40,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:59:40,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:59:40,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:59:36" (1/3) ... [2021-12-06 20:59:40,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbcc282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:59:40, skipping insertion in model container [2021-12-06 20:59:40,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:59:37" (2/3) ... [2021-12-06 20:59:40,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbcc282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:59:40, skipping insertion in model container [2021-12-06 20:59:40,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:59:40" (3/3) ... [2021-12-06 20:59:40,113 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.10.i.cil-2.c [2021-12-06 20:59:40,118 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:59:40,118 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:59:40,159 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:59:40,165 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 20:59:40,165 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:59:40,178 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.710344827586207) internal successors, (248), 146 states have internal predecessors, (248), 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 20:59:40,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 20:59:40,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:40,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:40,186 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:59:40,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:40,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1692155939, now seen corresponding path program 1 times [2021-12-06 20:59:40,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:40,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762215192] [2021-12-06 20:59:40,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:40,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:40,552 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 20:59:40,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:40,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762215192] [2021-12-06 20:59:40,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762215192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:59:40,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:59:40,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:59:40,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283931797] [2021-12-06 20:59:40,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:59:40,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:59:40,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:40,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:59:40,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:59:40,582 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.710344827586207) internal successors, (248), 146 states have internal predecessors, (248), 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 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 20:59:41,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:41,988 INFO L93 Difference]: Finished difference Result 412 states and 698 transitions. [2021-12-06 20:59:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:59:41,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 43 [2021-12-06 20:59:41,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:42,001 INFO L225 Difference]: With dead ends: 412 [2021-12-06 20:59:42,002 INFO L226 Difference]: Without dead ends: 250 [2021-12-06 20:59:42,004 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 20:59:42,006 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 150 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:42,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 423 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 20:59:42,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-06 20:59:42,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 174. [2021-12-06 20:59:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.6011560693641618) internal successors, (277), 173 states have internal predecessors, (277), 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 20:59:42,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 277 transitions. [2021-12-06 20:59:42,045 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 277 transitions. Word has length 43 [2021-12-06 20:59:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:42,045 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 277 transitions. [2021-12-06 20:59:42,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 20:59:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 277 transitions. [2021-12-06 20:59:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 20:59:42,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:42,049 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] [2021-12-06 20:59:42,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:59:42,049 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:59:42,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:42,050 INFO L85 PathProgramCache]: Analyzing trace with hash 910693922, now seen corresponding path program 1 times [2021-12-06 20:59:42,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:42,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957097144] [2021-12-06 20:59:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:42,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:42,156 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 20:59:42,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:42,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957097144] [2021-12-06 20:59:42,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957097144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:59:42,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:59:42,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:59:42,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682701440] [2021-12-06 20:59:42,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:59:42,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:59:42,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:42,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:59:42,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:59:42,159 INFO L87 Difference]: Start difference. First operand 174 states and 277 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 20:59:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:43,313 INFO L93 Difference]: Finished difference Result 366 states and 581 transitions. [2021-12-06 20:59:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:59:43,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 44 [2021-12-06 20:59:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:43,315 INFO L225 Difference]: With dead ends: 366 [2021-12-06 20:59:43,316 INFO L226 Difference]: Without dead ends: 202 [2021-12-06 20:59:43,316 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 20:59:43,317 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 22 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:43,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 451 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 20:59:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-06 20:59:43,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 185. [2021-12-06 20:59:43,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.608695652173913) internal successors, (296), 184 states have internal predecessors, (296), 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 20:59:43,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 296 transitions. [2021-12-06 20:59:43,329 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 296 transitions. Word has length 44 [2021-12-06 20:59:43,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:43,330 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 296 transitions. [2021-12-06 20:59:43,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 20:59:43,330 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 296 transitions. [2021-12-06 20:59:43,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 20:59:43,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:43,332 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:43,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:59:43,332 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:59:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:43,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1232633144, now seen corresponding path program 1 times [2021-12-06 20:59:43,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:43,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066669029] [2021-12-06 20:59:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:43,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:59:43,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:43,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066669029] [2021-12-06 20:59:43,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066669029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:59:43,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:59:43,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:59:43,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336145510] [2021-12-06 20:59:43,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:59:43,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:59:43,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:43,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:59:43,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:59:43,435 INFO L87 Difference]: Start difference. First operand 185 states and 296 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 20:59:44,510 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:59:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:44,779 INFO L93 Difference]: Finished difference Result 503 states and 809 transitions. [2021-12-06 20:59:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:59:44,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2021-12-06 20:59:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:44,782 INFO L225 Difference]: With dead ends: 503 [2021-12-06 20:59:44,782 INFO L226 Difference]: Without dead ends: 339 [2021-12-06 20:59:44,783 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 20:59:44,784 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 139 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:44,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 588 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 20:59:44,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-06 20:59:44,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 217. [2021-12-06 20:59:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.6064814814814814) internal successors, (347), 216 states have internal predecessors, (347), 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 20:59:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 347 transitions. [2021-12-06 20:59:44,795 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 347 transitions. Word has length 57 [2021-12-06 20:59:44,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:44,796 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 347 transitions. [2021-12-06 20:59:44,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 20:59:44,796 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 347 transitions. [2021-12-06 20:59:44,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 20:59:44,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:44,798 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 20:59:44,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 20:59:44,798 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:59:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:44,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1458561385, now seen corresponding path program 1 times [2021-12-06 20:59:44,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:44,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335320427] [2021-12-06 20:59:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:44,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:59:44,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:44,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335320427] [2021-12-06 20:59:44,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335320427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:59:44,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:59:44,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:59:44,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249719339] [2021-12-06 20:59:44,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:59:44,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:59:44,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:44,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:59:44,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:59:44,879 INFO L87 Difference]: Start difference. First operand 217 states and 347 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 20:59:45,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:59:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:46,192 INFO L93 Difference]: Finished difference Result 511 states and 812 transitions. [2021-12-06 20:59:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:59:46,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-12-06 20:59:46,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:46,194 INFO L225 Difference]: With dead ends: 511 [2021-12-06 20:59:46,194 INFO L226 Difference]: Without dead ends: 315 [2021-12-06 20:59:46,195 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 20:59:46,196 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 144 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:46,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 316 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 20:59:46,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-12-06 20:59:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 217. [2021-12-06 20:59:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.587962962962963) internal successors, (343), 216 states have internal predecessors, (343), 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 20:59:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 343 transitions. [2021-12-06 20:59:46,205 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 343 transitions. Word has length 58 [2021-12-06 20:59:46,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:46,206 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 343 transitions. [2021-12-06 20:59:46,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 20:59:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 343 transitions. [2021-12-06 20:59:46,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 20:59:46,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:46,208 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] [2021-12-06 20:59:46,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 20:59:46,208 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:59:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:46,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1788895107, now seen corresponding path program 1 times [2021-12-06 20:59:46,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:46,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966207867] [2021-12-06 20:59:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:46,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:59:46,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:46,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966207867] [2021-12-06 20:59:46,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966207867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:59:46,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:59:46,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:59:46,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033024367] [2021-12-06 20:59:46,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:59:46,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:59:46,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:46,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:59:46,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:59:46,281 INFO L87 Difference]: Start difference. First operand 217 states and 343 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 20:59:48,071 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:59:48,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:48,278 INFO L93 Difference]: Finished difference Result 429 states and 675 transitions. [2021-12-06 20:59:48,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:59:48,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-12-06 20:59:48,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:48,280 INFO L225 Difference]: With dead ends: 429 [2021-12-06 20:59:48,280 INFO L226 Difference]: Without dead ends: 233 [2021-12-06 20:59:48,281 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 20:59:48,281 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 26 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:48,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 455 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 20:59:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-06 20:59:48,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2021-12-06 20:59:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.5833333333333333) internal successors, (342), 216 states have internal predecessors, (342), 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 20:59:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 342 transitions. [2021-12-06 20:59:48,289 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 342 transitions. Word has length 58 [2021-12-06 20:59:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:48,289 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 342 transitions. [2021-12-06 20:59:48,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 20:59:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 342 transitions. [2021-12-06 20:59:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 20:59:48,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:48,291 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:48,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 20:59:48,291 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:59:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:48,291 INFO L85 PathProgramCache]: Analyzing trace with hash 653028812, now seen corresponding path program 1 times [2021-12-06 20:59:48,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:48,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646817804] [2021-12-06 20:59:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:48,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:59:48,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:48,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646817804] [2021-12-06 20:59:48,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646817804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:59:48,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:59:48,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:59:48,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033291887] [2021-12-06 20:59:48,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:59:48,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:59:48,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:48,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:59:48,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:59:48,361 INFO L87 Difference]: Start difference. First operand 217 states and 342 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 20:59:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:48,889 INFO L93 Difference]: Finished difference Result 428 states and 673 transitions. [2021-12-06 20:59:48,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:59:48,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-12-06 20:59:48,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:48,891 INFO L225 Difference]: With dead ends: 428 [2021-12-06 20:59:48,891 INFO L226 Difference]: Without dead ends: 232 [2021-12-06 20:59:48,892 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 20:59:48,893 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 19 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:48,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 457 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:59:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-06 20:59:48,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 217. [2021-12-06 20:59:48,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.5787037037037037) internal successors, (341), 216 states have internal predecessors, (341), 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 20:59:48,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 341 transitions. [2021-12-06 20:59:48,901 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 341 transitions. Word has length 58 [2021-12-06 20:59:48,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:48,901 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 341 transitions. [2021-12-06 20:59:48,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 20:59:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 341 transitions. [2021-12-06 20:59:48,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 20:59:48,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:48,909 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 20:59:48,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 20:59:48,909 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:59:48,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:48,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1973882124, now seen corresponding path program 1 times [2021-12-06 20:59:48,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:48,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900175732] [2021-12-06 20:59:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:48,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:59:48,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:48,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900175732] [2021-12-06 20:59:48,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900175732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:59:48,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:59:48,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:59:48,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948208753] [2021-12-06 20:59:48,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:59:48,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:59:48,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:48,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:59:48,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:59:48,982 INFO L87 Difference]: Start difference. First operand 217 states and 341 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 20:59:50,446 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:59:50,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:50,728 INFO L93 Difference]: Finished difference Result 511 states and 803 transitions. [2021-12-06 20:59:50,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:59:50,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-12-06 20:59:50,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:50,730 INFO L225 Difference]: With dead ends: 511 [2021-12-06 20:59:50,731 INFO L226 Difference]: Without dead ends: 315 [2021-12-06 20:59:50,731 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 20:59:50,732 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 137 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:50,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 316 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 20:59:50,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-12-06 20:59:50,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 218. [2021-12-06 20:59:50,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.566820276497696) internal successors, (340), 217 states have internal predecessors, (340), 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 20:59:50,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 340 transitions. [2021-12-06 20:59:50,742 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 340 transitions. Word has length 58 [2021-12-06 20:59:50,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:50,742 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 340 transitions. [2021-12-06 20:59:50,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 20:59:50,742 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 340 transitions. [2021-12-06 20:59:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 20:59:50,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:50,743 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] [2021-12-06 20:59:50,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 20:59:50,743 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:59:50,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:50,744 INFO L85 PathProgramCache]: Analyzing trace with hash 477040383, now seen corresponding path program 1 times [2021-12-06 20:59:50,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:50,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134912705] [2021-12-06 20:59:50,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:50,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:59:50,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:50,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134912705] [2021-12-06 20:59:50,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134912705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:59:50,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:59:50,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:59:50,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131641845] [2021-12-06 20:59:50,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:59:50,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:59:50,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:50,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:59:50,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:59:50,811 INFO L87 Difference]: Start difference. First operand 218 states and 340 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 20:59:52,546 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:59:52,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:52,720 INFO L93 Difference]: Finished difference Result 428 states and 669 transitions. [2021-12-06 20:59:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:59:52,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 59 [2021-12-06 20:59:52,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:52,721 INFO L225 Difference]: With dead ends: 428 [2021-12-06 20:59:52,722 INFO L226 Difference]: Without dead ends: 231 [2021-12-06 20:59:52,722 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 20:59:52,722 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 22 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:52,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 461 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 20:59:52,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-06 20:59:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 218. [2021-12-06 20:59:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.5622119815668203) internal successors, (339), 217 states have internal predecessors, (339), 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 20:59:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 339 transitions. [2021-12-06 20:59:52,728 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 339 transitions. Word has length 59 [2021-12-06 20:59:52,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:52,729 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 339 transitions. [2021-12-06 20:59:52,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 20:59:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 339 transitions. [2021-12-06 20:59:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 20:59:52,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:52,730 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 20:59:52,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 20:59:52,730 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:59:52,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:52,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1137447710, now seen corresponding path program 1 times [2021-12-06 20:59:52,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:52,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988206215] [2021-12-06 20:59:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:52,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:52,802 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 20:59:52,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:52,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988206215] [2021-12-06 20:59:52,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988206215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:59:52,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:59:52,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:59:52,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143676063] [2021-12-06 20:59:52,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:59:52,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:59:52,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:52,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:59:52,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:59:52,805 INFO L87 Difference]: Start difference. First operand 218 states and 339 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 20:59:54,634 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:59:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:54,835 INFO L93 Difference]: Finished difference Result 428 states and 668 transitions. [2021-12-06 20:59:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:59:54,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 60 [2021-12-06 20:59:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:54,836 INFO L225 Difference]: With dead ends: 428 [2021-12-06 20:59:54,836 INFO L226 Difference]: Without dead ends: 231 [2021-12-06 20:59:54,837 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 20:59:54,837 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 20 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:54,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 461 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 20:59:54,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-06 20:59:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 218. [2021-12-06 20:59:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.5576036866359446) internal successors, (338), 217 states have internal predecessors, (338), 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 20:59:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 338 transitions. [2021-12-06 20:59:54,843 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 338 transitions. Word has length 60 [2021-12-06 20:59:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:54,843 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 338 transitions. [2021-12-06 20:59:54,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 20:59:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 338 transitions. [2021-12-06 20:59:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 20:59:54,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:54,844 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 20:59:54,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 20:59:54,844 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:59:54,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:54,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1486530822, now seen corresponding path program 1 times [2021-12-06 20:59:54,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:54,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444244889] [2021-12-06 20:59:54,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:54,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:59:54,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:54,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444244889] [2021-12-06 20:59:54,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444244889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:59:54,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:59:54,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:59:54,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249166497] [2021-12-06 20:59:54,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:59:54,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:59:54,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:54,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:59:54,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:59:54,916 INFO L87 Difference]: Start difference. First operand 218 states and 338 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 20:59:56,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:59:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:57,092 INFO L93 Difference]: Finished difference Result 418 states and 654 transitions. [2021-12-06 20:59:57,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:59:57,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 20:59:57,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:57,094 INFO L225 Difference]: With dead ends: 418 [2021-12-06 20:59:57,094 INFO L226 Difference]: Without dead ends: 221 [2021-12-06 20:59:57,095 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 20:59:57,095 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 11 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:57,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 475 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 20:59:57,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-06 20:59:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2021-12-06 20:59:57,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.5529953917050692) internal successors, (337), 217 states have internal predecessors, (337), 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 20:59:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 337 transitions. [2021-12-06 20:59:57,100 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 337 transitions. Word has length 61 [2021-12-06 20:59:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:57,100 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 337 transitions. [2021-12-06 20:59:57,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 20:59:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 337 transitions. [2021-12-06 20:59:57,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 20:59:57,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:57,101 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 20:59:57,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 20:59:57,101 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:59:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:57,102 INFO L85 PathProgramCache]: Analyzing trace with hash -813532014, now seen corresponding path program 1 times [2021-12-06 20:59:57,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:57,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694456706] [2021-12-06 20:59:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:57,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:59:57,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:57,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694456706] [2021-12-06 20:59:57,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694456706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:59:57,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:59:57,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:59:57,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276507752] [2021-12-06 20:59:57,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:59:57,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:59:57,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:57,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:59:57,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:59:57,175 INFO L87 Difference]: Start difference. First operand 218 states and 337 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 20:59:58,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:58,054 INFO L93 Difference]: Finished difference Result 512 states and 797 transitions. [2021-12-06 20:59:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:59:58,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 20:59:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:58,056 INFO L225 Difference]: With dead ends: 512 [2021-12-06 20:59:58,056 INFO L226 Difference]: Without dead ends: 315 [2021-12-06 20:59:58,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 20:59:58,057 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 114 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:58,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 330 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 20:59:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-12-06 20:59:58,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 241. [2021-12-06 20:59:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.5916666666666666) internal successors, (382), 240 states have internal predecessors, (382), 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 20:59:58,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 382 transitions. [2021-12-06 20:59:58,063 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 382 transitions. Word has length 61 [2021-12-06 20:59:58,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:58,064 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 382 transitions. [2021-12-06 20:59:58,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 20:59:58,064 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 382 transitions. [2021-12-06 20:59:58,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 20:59:58,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:58,065 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:59:58,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 20:59:58,065 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:59:58,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:58,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1848715960, now seen corresponding path program 1 times [2021-12-06 20:59:58,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:58,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229547979] [2021-12-06 20:59:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:58,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:59:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:59:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:59:58,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:59:58,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229547979] [2021-12-06 20:59:58,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229547979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:59:58,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:59:58,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:59:58,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096954508] [2021-12-06 20:59:58,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:59:58,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:59:58,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:59:58,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:59:58,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:59:58,145 INFO L87 Difference]: Start difference. First operand 241 states and 382 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:59,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:59:59,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:59:59,985 INFO L93 Difference]: Finished difference Result 611 states and 977 transitions. [2021-12-06 20:59:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:59:59,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-06 20:59:59,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:59:59,987 INFO L225 Difference]: With dead ends: 611 [2021-12-06 20:59:59,987 INFO L226 Difference]: Without dead ends: 391 [2021-12-06 20:59:59,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 20:59:59,988 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 120 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:59:59,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 326 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 20:59:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-12-06 20:59:59,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 305. [2021-12-06 20:59:59,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.618421052631579) internal successors, (492), 304 states have internal predecessors, (492), 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 20:59:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 492 transitions. [2021-12-06 20:59:59,995 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 492 transitions. Word has length 89 [2021-12-06 20:59:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:59:59,995 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 492 transitions. [2021-12-06 20:59:59,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:59:59,995 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 492 transitions. [2021-12-06 20:59:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-06 20:59:59,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:59:59,996 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 20:59:59,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 20:59:59,996 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:59:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:59:59,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1555801769, now seen corresponding path program 1 times [2021-12-06 20:59:59,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:59:59,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930266623] [2021-12-06 20:59:59,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:59:59,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:00:00,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:00,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930266623] [2021-12-06 21:00:00,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930266623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:00,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:00,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:00,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460120461] [2021-12-06 21:00:00,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:00,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:00,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:00,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:00,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:00,097 INFO L87 Difference]: Start difference. First operand 305 states and 492 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 21:00:01,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:01,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:01,759 INFO L93 Difference]: Finished difference Result 703 states and 1130 transitions. [2021-12-06 21:00:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:01,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 94 [2021-12-06 21:00:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:01,761 INFO L225 Difference]: With dead ends: 703 [2021-12-06 21:00:01,761 INFO L226 Difference]: Without dead ends: 419 [2021-12-06 21:00:01,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:00:01,762 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 116 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:01,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 314 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 21:00:01,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-06 21:00:01,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 342. [2021-12-06 21:00:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.6275659824046922) internal successors, (555), 341 states have internal predecessors, (555), 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 21:00:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 555 transitions. [2021-12-06 21:00:01,770 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 555 transitions. Word has length 94 [2021-12-06 21:00:01,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:01,770 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 555 transitions. [2021-12-06 21:00:01,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 21:00:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 555 transitions. [2021-12-06 21:00:01,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 21:00:01,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:01,771 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:01,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 21:00:01,771 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:01,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:01,772 INFO L85 PathProgramCache]: Analyzing trace with hash 430223126, now seen corresponding path program 1 times [2021-12-06 21:00:01,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:01,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852354753] [2021-12-06 21:00:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:01,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 21:00:01,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:01,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852354753] [2021-12-06 21:00:01,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852354753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:01,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:01,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:01,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183158538] [2021-12-06 21:00:01,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:01,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:01,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:01,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:01,839 INFO L87 Difference]: Start difference. First operand 342 states and 555 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 21:00:03,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:04,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:04,056 INFO L93 Difference]: Finished difference Result 703 states and 1145 transitions. [2021-12-06 21:00:04,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:04,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 95 [2021-12-06 21:00:04,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:04,059 INFO L225 Difference]: With dead ends: 703 [2021-12-06 21:00:04,059 INFO L226 Difference]: Without dead ends: 382 [2021-12-06 21:00:04,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:00:04,060 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 31 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:04,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 479 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 21:00:04,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-06 21:00:04,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 364. [2021-12-06 21:00:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.6253443526170799) internal successors, (590), 363 states have internal predecessors, (590), 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 21:00:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 590 transitions. [2021-12-06 21:00:04,071 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 590 transitions. Word has length 95 [2021-12-06 21:00:04,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:04,071 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 590 transitions. [2021-12-06 21:00:04,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 21:00:04,072 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 590 transitions. [2021-12-06 21:00:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 21:00:04,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:04,073 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 21:00:04,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 21:00:04,074 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:04,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:04,074 INFO L85 PathProgramCache]: Analyzing trace with hash -174040009, now seen corresponding path program 1 times [2021-12-06 21:00:04,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:04,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774459994] [2021-12-06 21:00:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:04,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 21:00:04,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:04,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774459994] [2021-12-06 21:00:04,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774459994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:04,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:04,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:04,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051263156] [2021-12-06 21:00:04,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:04,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:04,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:04,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:04,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:04,142 INFO L87 Difference]: Start difference. First operand 364 states and 590 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 21:00:06,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:06,345 INFO L93 Difference]: Finished difference Result 725 states and 1179 transitions. [2021-12-06 21:00:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:06,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 109 [2021-12-06 21:00:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:06,347 INFO L225 Difference]: With dead ends: 725 [2021-12-06 21:00:06,347 INFO L226 Difference]: Without dead ends: 382 [2021-12-06 21:00:06,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:00:06,348 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 40 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:06,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 479 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 160 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 21:00:06,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-06 21:00:06,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 364. [2021-12-06 21:00:06,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.6225895316804408) internal successors, (589), 363 states have internal predecessors, (589), 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 21:00:06,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 589 transitions. [2021-12-06 21:00:06,356 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 589 transitions. Word has length 109 [2021-12-06 21:00:06,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:06,356 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 589 transitions. [2021-12-06 21:00:06,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 21:00:06,356 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 589 transitions. [2021-12-06 21:00:06,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 21:00:06,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:06,357 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-06 21:00:06,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 21:00:06,357 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:06,358 INFO L85 PathProgramCache]: Analyzing trace with hash -851994560, now seen corresponding path program 1 times [2021-12-06 21:00:06,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:06,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111386730] [2021-12-06 21:00:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:06,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 21:00:06,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:06,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111386730] [2021-12-06 21:00:06,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111386730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:06,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:06,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:06,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883927890] [2021-12-06 21:00:06,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:06,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:06,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:06,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:06,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:06,429 INFO L87 Difference]: Start difference. First operand 364 states and 589 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 21:00:07,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:07,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:07,791 INFO L93 Difference]: Finished difference Result 780 states and 1254 transitions. [2021-12-06 21:00:07,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:07,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 109 [2021-12-06 21:00:07,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:07,793 INFO L225 Difference]: With dead ends: 780 [2021-12-06 21:00:07,793 INFO L226 Difference]: Without dead ends: 437 [2021-12-06 21:00:07,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:00:07,794 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 135 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:07,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 316 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 21:00:07,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-12-06 21:00:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 364. [2021-12-06 21:00:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.606060606060606) internal successors, (583), 363 states have internal predecessors, (583), 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 21:00:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 583 transitions. [2021-12-06 21:00:07,801 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 583 transitions. Word has length 109 [2021-12-06 21:00:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:07,801 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 583 transitions. [2021-12-06 21:00:07,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 21:00:07,801 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 583 transitions. [2021-12-06 21:00:07,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 21:00:07,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:07,802 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 21:00:07,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 21:00:07,803 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:07,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:07,803 INFO L85 PathProgramCache]: Analyzing trace with hash 262499795, now seen corresponding path program 1 times [2021-12-06 21:00:07,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:07,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808378127] [2021-12-06 21:00:07,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:07,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 21:00:07,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:07,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808378127] [2021-12-06 21:00:07,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808378127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:07,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:07,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:07,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524001612] [2021-12-06 21:00:07,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:07,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:07,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:07,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:07,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:07,872 INFO L87 Difference]: Start difference. First operand 364 states and 583 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 21:00:08,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:08,755 INFO L93 Difference]: Finished difference Result 780 states and 1242 transitions. [2021-12-06 21:00:08,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:08,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 110 [2021-12-06 21:00:08,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:08,758 INFO L225 Difference]: With dead ends: 780 [2021-12-06 21:00:08,758 INFO L226 Difference]: Without dead ends: 437 [2021-12-06 21:00:08,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:00:08,758 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 139 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:08,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 316 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 21:00:08,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-12-06 21:00:08,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 364. [2021-12-06 21:00:08,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.5867768595041323) internal successors, (576), 363 states have internal predecessors, (576), 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 21:00:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 576 transitions. [2021-12-06 21:00:08,769 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 576 transitions. Word has length 110 [2021-12-06 21:00:08,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:08,769 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 576 transitions. [2021-12-06 21:00:08,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 21:00:08,769 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 576 transitions. [2021-12-06 21:00:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 21:00:08,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:08,770 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 21:00:08,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 21:00:08,770 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:08,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:08,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1945924334, now seen corresponding path program 1 times [2021-12-06 21:00:08,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:08,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164347600] [2021-12-06 21:00:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:08,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 21:00:08,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:08,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164347600] [2021-12-06 21:00:08,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164347600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:08,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:08,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:08,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550147822] [2021-12-06 21:00:08,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:08,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:08,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:08,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:08,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:08,838 INFO L87 Difference]: Start difference. First operand 364 states and 576 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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 21:00:10,430 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:10,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:10,720 INFO L93 Difference]: Finished difference Result 780 states and 1228 transitions. [2021-12-06 21:00:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:10,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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 111 [2021-12-06 21:00:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:10,722 INFO L225 Difference]: With dead ends: 780 [2021-12-06 21:00:10,722 INFO L226 Difference]: Without dead ends: 437 [2021-12-06 21:00:10,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:00:10,723 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 137 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:10,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 316 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 21:00:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-12-06 21:00:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 364. [2021-12-06 21:00:10,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.5674931129476584) internal successors, (569), 363 states have internal predecessors, (569), 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 21:00:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 569 transitions. [2021-12-06 21:00:10,730 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 569 transitions. Word has length 111 [2021-12-06 21:00:10,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:10,730 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 569 transitions. [2021-12-06 21:00:10,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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 21:00:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 569 transitions. [2021-12-06 21:00:10,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 21:00:10,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:10,731 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 21:00:10,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 21:00:10,731 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:10,732 INFO L85 PathProgramCache]: Analyzing trace with hash -248884466, now seen corresponding path program 1 times [2021-12-06 21:00:10,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:10,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087623673] [2021-12-06 21:00:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:10,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 21:00:10,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:10,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087623673] [2021-12-06 21:00:10,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087623673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:10,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:10,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:10,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669740621] [2021-12-06 21:00:10,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:10,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:10,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:10,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:10,802 INFO L87 Difference]: Start difference. First operand 364 states and 569 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 21:00:11,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:11,696 INFO L93 Difference]: Finished difference Result 780 states and 1214 transitions. [2021-12-06 21:00:11,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:11,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 112 [2021-12-06 21:00:11,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:11,698 INFO L225 Difference]: With dead ends: 780 [2021-12-06 21:00:11,698 INFO L226 Difference]: Without dead ends: 437 [2021-12-06 21:00:11,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:00:11,699 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 135 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:11,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 316 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 21:00:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-12-06 21:00:11,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 364. [2021-12-06 21:00:11,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.5482093663911847) internal successors, (562), 363 states have internal predecessors, (562), 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 21:00:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 562 transitions. [2021-12-06 21:00:11,710 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 562 transitions. Word has length 112 [2021-12-06 21:00:11,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:11,710 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 562 transitions. [2021-12-06 21:00:11,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 21:00:11,710 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 562 transitions. [2021-12-06 21:00:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 21:00:11,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:11,711 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:11,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 21:00:11,711 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:11,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:11,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1564451825, now seen corresponding path program 1 times [2021-12-06 21:00:11,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:11,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481056641] [2021-12-06 21:00:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:11,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 21:00:11,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:11,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481056641] [2021-12-06 21:00:11,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481056641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:11,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:11,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:11,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956440418] [2021-12-06 21:00:11,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:11,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:11,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:11,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:11,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:11,785 INFO L87 Difference]: Start difference. First operand 364 states and 562 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 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 21:00:13,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:14,054 INFO L93 Difference]: Finished difference Result 797 states and 1232 transitions. [2021-12-06 21:00:14,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:14,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 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 117 [2021-12-06 21:00:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:14,057 INFO L225 Difference]: With dead ends: 797 [2021-12-06 21:00:14,057 INFO L226 Difference]: Without dead ends: 454 [2021-12-06 21:00:14,057 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 21:00:14,058 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 74 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:14,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 447 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 21:00:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-12-06 21:00:14,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 404. [2021-12-06 21:00:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.5508684863523574) internal successors, (625), 403 states have internal predecessors, (625), 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 21:00:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 625 transitions. [2021-12-06 21:00:14,065 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 625 transitions. Word has length 117 [2021-12-06 21:00:14,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:14,065 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 625 transitions. [2021-12-06 21:00:14,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 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 21:00:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 625 transitions. [2021-12-06 21:00:14,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 21:00:14,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:14,066 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:14,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 21:00:14,066 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:14,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1843292625, now seen corresponding path program 1 times [2021-12-06 21:00:14,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:14,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430939228] [2021-12-06 21:00:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:14,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 21:00:14,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:14,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430939228] [2021-12-06 21:00:14,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430939228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:14,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:14,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:14,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463657068] [2021-12-06 21:00:14,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:14,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:14,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:14,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:14,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:14,141 INFO L87 Difference]: Start difference. First operand 404 states and 625 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 21:00:15,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:15,536 INFO L93 Difference]: Finished difference Result 832 states and 1289 transitions. [2021-12-06 21:00:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:15,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 117 [2021-12-06 21:00:15,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:15,538 INFO L225 Difference]: With dead ends: 832 [2021-12-06 21:00:15,538 INFO L226 Difference]: Without dead ends: 449 [2021-12-06 21:00:15,539 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 21:00:15,539 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 33 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:15,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 567 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 21:00:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-12-06 21:00:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 428. [2021-12-06 21:00:15,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.5456674473067915) internal successors, (660), 427 states have internal predecessors, (660), 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 21:00:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 660 transitions. [2021-12-06 21:00:15,549 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 660 transitions. Word has length 117 [2021-12-06 21:00:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:15,550 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 660 transitions. [2021-12-06 21:00:15,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 21:00:15,550 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 660 transitions. [2021-12-06 21:00:15,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 21:00:15,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:15,551 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 21:00:15,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 21:00:15,552 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:15,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:15,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1399752639, now seen corresponding path program 1 times [2021-12-06 21:00:15,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:15,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513453483] [2021-12-06 21:00:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:15,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 21:00:15,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:15,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513453483] [2021-12-06 21:00:15,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513453483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:15,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:15,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:15,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403473946] [2021-12-06 21:00:15,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:15,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:15,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:15,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:15,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:15,654 INFO L87 Difference]: Start difference. First operand 428 states and 660 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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 21:00:17,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:18,004 INFO L93 Difference]: Finished difference Result 948 states and 1460 transitions. [2021-12-06 21:00:18,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:18,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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 21:00:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:18,007 INFO L225 Difference]: With dead ends: 948 [2021-12-06 21:00:18,007 INFO L226 Difference]: Without dead ends: 541 [2021-12-06 21:00:18,008 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 21:00:18,008 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 105 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:18,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 317 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 21:00:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-12-06 21:00:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 471. [2021-12-06 21:00:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.5510638297872341) internal successors, (729), 470 states have internal predecessors, (729), 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 21:00:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 729 transitions. [2021-12-06 21:00:18,016 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 729 transitions. Word has length 125 [2021-12-06 21:00:18,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:18,017 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 729 transitions. [2021-12-06 21:00:18,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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 21:00:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 729 transitions. [2021-12-06 21:00:18,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-06 21:00:18,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:18,018 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:18,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 21:00:18,018 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:18,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:18,018 INFO L85 PathProgramCache]: Analyzing trace with hash 309940842, now seen corresponding path program 1 times [2021-12-06 21:00:18,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:18,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68951808] [2021-12-06 21:00:18,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:18,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 21:00:18,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:18,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68951808] [2021-12-06 21:00:18,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68951808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:18,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:18,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:18,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882546227] [2021-12-06 21:00:18,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:18,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:18,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:18,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:18,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:18,110 INFO L87 Difference]: Start difference. First operand 471 states and 729 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 21:00:19,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:20,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:20,071 INFO L93 Difference]: Finished difference Result 994 states and 1534 transitions. [2021-12-06 21:00:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:20,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 126 [2021-12-06 21:00:20,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:20,074 INFO L225 Difference]: With dead ends: 994 [2021-12-06 21:00:20,074 INFO L226 Difference]: Without dead ends: 542 [2021-12-06 21:00:20,074 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 21:00:20,075 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 106 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:20,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 316 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 21:00:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-12-06 21:00:20,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 473. [2021-12-06 21:00:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.5508474576271187) internal successors, (732), 472 states have internal predecessors, (732), 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 21:00:20,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 732 transitions. [2021-12-06 21:00:20,085 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 732 transitions. Word has length 126 [2021-12-06 21:00:20,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:20,085 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 732 transitions. [2021-12-06 21:00:20,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 21:00:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 732 transitions. [2021-12-06 21:00:20,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 21:00:20,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:20,087 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-06 21:00:20,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 21:00:20,087 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:20,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:20,088 INFO L85 PathProgramCache]: Analyzing trace with hash -474729006, now seen corresponding path program 1 times [2021-12-06 21:00:20,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:20,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324941023] [2021-12-06 21:00:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:20,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-06 21:00:20,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:20,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324941023] [2021-12-06 21:00:20,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324941023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:20,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:20,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:00:20,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414133659] [2021-12-06 21:00:20,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:20,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:00:20,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:20,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:00:20,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:00:20,182 INFO L87 Difference]: Start difference. First operand 473 states and 732 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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 21:00:22,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:24,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:24,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:24,526 INFO L93 Difference]: Finished difference Result 935 states and 1452 transitions. [2021-12-06 21:00:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:00:24,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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 131 [2021-12-06 21:00:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:24,528 INFO L225 Difference]: With dead ends: 935 [2021-12-06 21:00:24,528 INFO L226 Difference]: Without dead ends: 483 [2021-12-06 21:00:24,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:00:24,529 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 144 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:24,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 338 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 310 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-06 21:00:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-12-06 21:00:24,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 482. [2021-12-06 21:00:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.5446985446985446) internal successors, (743), 481 states have internal predecessors, (743), 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 21:00:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 743 transitions. [2021-12-06 21:00:24,537 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 743 transitions. Word has length 131 [2021-12-06 21:00:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:24,537 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 743 transitions. [2021-12-06 21:00:24,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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 21:00:24,537 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 743 transitions. [2021-12-06 21:00:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-06 21:00:24,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:24,538 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-06 21:00:24,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 21:00:24,539 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:24,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:24,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1091943493, now seen corresponding path program 1 times [2021-12-06 21:00:24,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:24,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066976307] [2021-12-06 21:00:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:24,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 21:00:24,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:24,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066976307] [2021-12-06 21:00:24,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066976307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:24,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:24,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:24,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858760037] [2021-12-06 21:00:24,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:24,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:24,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:24,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:24,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:24,613 INFO L87 Difference]: Start difference. First operand 482 states and 743 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 21:00:26,620 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:26,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:26,890 INFO L93 Difference]: Finished difference Result 1002 states and 1542 transitions. [2021-12-06 21:00:26,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:26,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 132 [2021-12-06 21:00:26,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:26,893 INFO L225 Difference]: With dead ends: 1002 [2021-12-06 21:00:26,893 INFO L226 Difference]: Without dead ends: 541 [2021-12-06 21:00:26,894 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 21:00:26,894 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 128 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:26,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 354 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 21:00:26,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-12-06 21:00:26,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 482. [2021-12-06 21:00:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.525987525987526) internal successors, (734), 481 states have internal predecessors, (734), 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 21:00:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 734 transitions. [2021-12-06 21:00:26,903 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 734 transitions. Word has length 132 [2021-12-06 21:00:26,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:26,903 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 734 transitions. [2021-12-06 21:00:26,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 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 21:00:26,903 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 734 transitions. [2021-12-06 21:00:26,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-06 21:00:26,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:26,904 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:26,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 21:00:26,904 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:26,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:26,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2126146282, now seen corresponding path program 1 times [2021-12-06 21:00:26,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:26,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001983927] [2021-12-06 21:00:26,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:26,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 21:00:26,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:26,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001983927] [2021-12-06 21:00:26,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001983927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:26,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:26,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:26,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875273677] [2021-12-06 21:00:26,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:26,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:26,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:26,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:26,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:26,987 INFO L87 Difference]: Start difference. First operand 482 states and 734 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 21:00:28,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:28,623 INFO L93 Difference]: Finished difference Result 977 states and 1489 transitions. [2021-12-06 21:00:28,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:28,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 138 [2021-12-06 21:00:28,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:28,626 INFO L225 Difference]: With dead ends: 977 [2021-12-06 21:00:28,626 INFO L226 Difference]: Without dead ends: 516 [2021-12-06 21:00:28,626 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 21:00:28,627 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 64 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:28,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 467 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 21:00:28,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-06 21:00:28,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 482. [2021-12-06 21:00:28,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.523908523908524) internal successors, (733), 481 states have internal predecessors, (733), 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 21:00:28,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 733 transitions. [2021-12-06 21:00:28,635 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 733 transitions. Word has length 138 [2021-12-06 21:00:28,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:28,635 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 733 transitions. [2021-12-06 21:00:28,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 21:00:28,635 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 733 transitions. [2021-12-06 21:00:28,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 21:00:28,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:28,636 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:28,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 21:00:28,637 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:28,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:28,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1366121880, now seen corresponding path program 1 times [2021-12-06 21:00:28,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:28,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428534567] [2021-12-06 21:00:28,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:28,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 21:00:28,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:28,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428534567] [2021-12-06 21:00:28,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428534567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:28,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:28,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:28,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890779955] [2021-12-06 21:00:28,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:28,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:28,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:28,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:28,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:28,747 INFO L87 Difference]: Start difference. First operand 482 states and 733 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 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 21:00:30,181 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:30,449 INFO L93 Difference]: Finished difference Result 1002 states and 1522 transitions. [2021-12-06 21:00:30,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:30,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 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 139 [2021-12-06 21:00:30,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:30,452 INFO L225 Difference]: With dead ends: 1002 [2021-12-06 21:00:30,452 INFO L226 Difference]: Without dead ends: 541 [2021-12-06 21:00:30,452 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 21:00:30,453 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 115 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:30,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 364 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 21:00:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-12-06 21:00:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 482. [2021-12-06 21:00:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.5093555093555093) internal successors, (726), 481 states have internal predecessors, (726), 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 21:00:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 726 transitions. [2021-12-06 21:00:30,467 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 726 transitions. Word has length 139 [2021-12-06 21:00:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:30,467 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 726 transitions. [2021-12-06 21:00:30,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 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 21:00:30,468 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 726 transitions. [2021-12-06 21:00:30,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 21:00:30,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:30,469 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:30,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 21:00:30,469 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:30,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:30,470 INFO L85 PathProgramCache]: Analyzing trace with hash 984886832, now seen corresponding path program 1 times [2021-12-06 21:00:30,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:30,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349427590] [2021-12-06 21:00:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:30,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 21:00:30,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:30,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349427590] [2021-12-06 21:00:30,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349427590] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:30,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:30,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:30,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028258344] [2021-12-06 21:00:30,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:30,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:30,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:30,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:30,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:30,554 INFO L87 Difference]: Start difference. First operand 482 states and 726 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 21:00:31,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:31,546 INFO L93 Difference]: Finished difference Result 975 states and 1471 transitions. [2021-12-06 21:00:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:31,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 139 [2021-12-06 21:00:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:31,549 INFO L225 Difference]: With dead ends: 975 [2021-12-06 21:00:31,549 INFO L226 Difference]: Without dead ends: 514 [2021-12-06 21:00:31,549 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 21:00:31,549 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 60 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:31,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 479 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 21:00:31,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-12-06 21:00:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 482. [2021-12-06 21:00:31,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.5072765072765073) internal successors, (725), 481 states have internal predecessors, (725), 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 21:00:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 725 transitions. [2021-12-06 21:00:31,557 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 725 transitions. Word has length 139 [2021-12-06 21:00:31,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:31,558 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 725 transitions. [2021-12-06 21:00:31,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 21:00:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 725 transitions. [2021-12-06 21:00:31,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 21:00:31,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:31,559 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:31,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 21:00:31,559 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:31,559 INFO L85 PathProgramCache]: Analyzing trace with hash 309390678, now seen corresponding path program 1 times [2021-12-06 21:00:31,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:31,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502212289] [2021-12-06 21:00:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:31,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-06 21:00:31,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:31,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502212289] [2021-12-06 21:00:31,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502212289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:31,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:31,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:31,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179791646] [2021-12-06 21:00:31,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:31,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:31,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:31,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:31,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:31,640 INFO L87 Difference]: Start difference. First operand 482 states and 725 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 21:00:33,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:33,856 INFO L93 Difference]: Finished difference Result 982 states and 1481 transitions. [2021-12-06 21:00:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:33,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 139 [2021-12-06 21:00:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:33,858 INFO L225 Difference]: With dead ends: 982 [2021-12-06 21:00:33,858 INFO L226 Difference]: Without dead ends: 521 [2021-12-06 21:00:33,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:00:33,859 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 27 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:33,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 555 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 21:00:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-12-06 21:00:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 508. [2021-12-06 21:00:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.5029585798816567) internal successors, (762), 507 states have internal predecessors, (762), 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 21:00:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 762 transitions. [2021-12-06 21:00:33,867 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 762 transitions. Word has length 139 [2021-12-06 21:00:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:33,868 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 762 transitions. [2021-12-06 21:00:33,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 21:00:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 762 transitions. [2021-12-06 21:00:33,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 21:00:33,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:33,869 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 21:00:33,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 21:00:33,869 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:33,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1970724841, now seen corresponding path program 1 times [2021-12-06 21:00:33,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:33,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135451537] [2021-12-06 21:00:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:33,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 21:00:33,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:33,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135451537] [2021-12-06 21:00:33,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135451537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:33,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:33,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:33,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483644786] [2021-12-06 21:00:33,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:33,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:33,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:33,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:33,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:33,984 INFO L87 Difference]: Start difference. First operand 508 states and 762 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 21:00:35,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:35,671 INFO L93 Difference]: Finished difference Result 1096 states and 1645 transitions. [2021-12-06 21:00:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:35,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 141 [2021-12-06 21:00:35,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:35,674 INFO L225 Difference]: With dead ends: 1096 [2021-12-06 21:00:35,674 INFO L226 Difference]: Without dead ends: 609 [2021-12-06 21:00:35,675 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 21:00:35,675 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 111 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:35,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 354 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 21:00:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-12-06 21:00:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 536. [2021-12-06 21:00:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.4897196261682244) internal successors, (797), 535 states have internal predecessors, (797), 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 21:00:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 797 transitions. [2021-12-06 21:00:35,687 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 797 transitions. Word has length 141 [2021-12-06 21:00:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:35,687 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 797 transitions. [2021-12-06 21:00:35,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 21:00:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 797 transitions. [2021-12-06 21:00:35,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-06 21:00:35,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:35,688 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:35,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 21:00:35,688 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:35,689 INFO L85 PathProgramCache]: Analyzing trace with hash 155364701, now seen corresponding path program 1 times [2021-12-06 21:00:35,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:35,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796348447] [2021-12-06 21:00:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:35,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 21:00:35,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:35,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796348447] [2021-12-06 21:00:35,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796348447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:35,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:35,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:35,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486631486] [2021-12-06 21:00:35,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:35,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:35,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:35,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:35,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:35,774 INFO L87 Difference]: Start difference. First operand 536 states and 797 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 21:00:37,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:37,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:37,858 INFO L93 Difference]: Finished difference Result 1075 states and 1600 transitions. [2021-12-06 21:00:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:37,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 142 [2021-12-06 21:00:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:37,860 INFO L225 Difference]: With dead ends: 1075 [2021-12-06 21:00:37,860 INFO L226 Difference]: Without dead ends: 560 [2021-12-06 21:00:37,861 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 21:00:37,861 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 51 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:37,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 497 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 21:00:37,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-12-06 21:00:37,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 536. [2021-12-06 21:00:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.4878504672897197) internal successors, (796), 535 states have internal predecessors, (796), 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 21:00:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 796 transitions. [2021-12-06 21:00:37,875 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 796 transitions. Word has length 142 [2021-12-06 21:00:37,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:37,875 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 796 transitions. [2021-12-06 21:00:37,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 21:00:37,875 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 796 transitions. [2021-12-06 21:00:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 21:00:37,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:37,876 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:37,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 21:00:37,876 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:37,877 INFO L85 PathProgramCache]: Analyzing trace with hash -773365661, now seen corresponding path program 1 times [2021-12-06 21:00:37,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:37,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425223537] [2021-12-06 21:00:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:37,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 21:00:37,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:37,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425223537] [2021-12-06 21:00:37,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425223537] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:37,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:37,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:37,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593019107] [2021-12-06 21:00:37,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:37,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:37,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:37,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:37,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:37,949 INFO L87 Difference]: Start difference. First operand 536 states and 796 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 21:00:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:38,687 INFO L93 Difference]: Finished difference Result 1075 states and 1598 transitions. [2021-12-06 21:00:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 145 [2021-12-06 21:00:38,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:38,690 INFO L225 Difference]: With dead ends: 1075 [2021-12-06 21:00:38,690 INFO L226 Difference]: Without dead ends: 560 [2021-12-06 21:00:38,690 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 21:00:38,690 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 53 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:38,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 497 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 21:00:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-12-06 21:00:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 536. [2021-12-06 21:00:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.485981308411215) internal successors, (795), 535 states have internal predecessors, (795), 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 21:00:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 795 transitions. [2021-12-06 21:00:38,699 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 795 transitions. Word has length 145 [2021-12-06 21:00:38,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:38,699 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 795 transitions. [2021-12-06 21:00:38,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 21:00:38,700 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 795 transitions. [2021-12-06 21:00:38,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 21:00:38,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:38,701 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 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] [2021-12-06 21:00:38,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-06 21:00:38,701 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:38,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:38,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1914296137, now seen corresponding path program 1 times [2021-12-06 21:00:38,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:38,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917303924] [2021-12-06 21:00:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:38,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 21:00:38,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:38,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917303924] [2021-12-06 21:00:38,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917303924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:38,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:38,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:38,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365145927] [2021-12-06 21:00:38,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:38,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:38,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:38,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:38,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:38,798 INFO L87 Difference]: Start difference. First operand 536 states and 795 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 21:00:40,760 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:41,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:41,058 INFO L93 Difference]: Finished difference Result 1110 states and 1646 transitions. [2021-12-06 21:00:41,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:41,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 146 [2021-12-06 21:00:41,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:41,061 INFO L225 Difference]: With dead ends: 1110 [2021-12-06 21:00:41,061 INFO L226 Difference]: Without dead ends: 595 [2021-12-06 21:00:41,061 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 21:00:41,061 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 112 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:41,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 338 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 21:00:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-12-06 21:00:41,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 536. [2021-12-06 21:00:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.4710280373831777) internal successors, (787), 535 states have internal predecessors, (787), 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 21:00:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 787 transitions. [2021-12-06 21:00:41,070 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 787 transitions. Word has length 146 [2021-12-06 21:00:41,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:41,071 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 787 transitions. [2021-12-06 21:00:41,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 21:00:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 787 transitions. [2021-12-06 21:00:41,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-06 21:00:41,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:41,072 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:41,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 21:00:41,072 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:41,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:41,072 INFO L85 PathProgramCache]: Analyzing trace with hash 436551973, now seen corresponding path program 1 times [2021-12-06 21:00:41,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:41,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705693289] [2021-12-06 21:00:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:41,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-06 21:00:41,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:41,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705693289] [2021-12-06 21:00:41,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705693289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:41,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:41,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:41,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870051118] [2021-12-06 21:00:41,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:41,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:41,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:41,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:41,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:41,145 INFO L87 Difference]: Start difference. First operand 536 states and 787 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 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 21:00:42,682 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:42,888 INFO L93 Difference]: Finished difference Result 1073 states and 1577 transitions. [2021-12-06 21:00:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:42,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 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 148 [2021-12-06 21:00:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:42,891 INFO L225 Difference]: With dead ends: 1073 [2021-12-06 21:00:42,895 INFO L226 Difference]: Without dead ends: 558 [2021-12-06 21:00:42,896 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 21:00:42,896 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 41 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:42,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 503 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 21:00:42,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-12-06 21:00:42,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 536. [2021-12-06 21:00:42,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.469158878504673) internal successors, (786), 535 states have internal predecessors, (786), 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 21:00:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 786 transitions. [2021-12-06 21:00:42,905 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 786 transitions. Word has length 148 [2021-12-06 21:00:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:42,905 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 786 transitions. [2021-12-06 21:00:42,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 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 21:00:42,906 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 786 transitions. [2021-12-06 21:00:42,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-06 21:00:42,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:42,906 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:42,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-06 21:00:42,907 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:42,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:42,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1682736421, now seen corresponding path program 1 times [2021-12-06 21:00:42,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:42,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932045909] [2021-12-06 21:00:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:42,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 21:00:42,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:42,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932045909] [2021-12-06 21:00:42,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932045909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:42,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:42,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:42,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373614567] [2021-12-06 21:00:42,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:42,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:42,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:42,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:42,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:42,996 INFO L87 Difference]: Start difference. First operand 536 states and 786 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 21:00:44,551 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:44,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:44,824 INFO L93 Difference]: Finished difference Result 1152 states and 1692 transitions. [2021-12-06 21:00:44,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:44,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 148 [2021-12-06 21:00:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:44,827 INFO L225 Difference]: With dead ends: 1152 [2021-12-06 21:00:44,827 INFO L226 Difference]: Without dead ends: 637 [2021-12-06 21:00:44,827 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 21:00:44,827 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 105 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:44,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 338 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 21:00:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-12-06 21:00:44,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 569. [2021-12-06 21:00:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 1.4630281690140845) internal successors, (831), 568 states have internal predecessors, (831), 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 21:00:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 831 transitions. [2021-12-06 21:00:44,844 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 831 transitions. Word has length 148 [2021-12-06 21:00:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:44,844 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 831 transitions. [2021-12-06 21:00:44,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 21:00:44,845 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 831 transitions. [2021-12-06 21:00:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-06 21:00:44,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:44,846 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 21:00:44,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-06 21:00:44,846 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:44,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:44,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1171061050, now seen corresponding path program 1 times [2021-12-06 21:00:44,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:44,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679113424] [2021-12-06 21:00:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:44,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-06 21:00:44,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:44,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679113424] [2021-12-06 21:00:44,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679113424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:44,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:44,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:44,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129701739] [2021-12-06 21:00:44,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:44,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:44,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:44,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:44,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:44,921 INFO L87 Difference]: Start difference. First operand 569 states and 831 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 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 21:00:45,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:46,235 INFO L93 Difference]: Finished difference Result 1176 states and 1718 transitions. [2021-12-06 21:00:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:46,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 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 149 [2021-12-06 21:00:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:46,238 INFO L225 Difference]: With dead ends: 1176 [2021-12-06 21:00:46,238 INFO L226 Difference]: Without dead ends: 628 [2021-12-06 21:00:46,239 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 21:00:46,239 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 104 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:46,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 338 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 21:00:46,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-12-06 21:00:46,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 569. [2021-12-06 21:00:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 1.454225352112676) internal successors, (826), 568 states have internal predecessors, (826), 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 21:00:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 826 transitions. [2021-12-06 21:00:46,253 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 826 transitions. Word has length 149 [2021-12-06 21:00:46,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:46,253 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 826 transitions. [2021-12-06 21:00:46,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 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 21:00:46,253 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 826 transitions. [2021-12-06 21:00:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-06 21:00:46,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:46,254 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:46,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-06 21:00:46,254 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:46,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:46,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2111739750, now seen corresponding path program 1 times [2021-12-06 21:00:46,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:46,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866769830] [2021-12-06 21:00:46,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:46,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-06 21:00:46,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:46,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866769830] [2021-12-06 21:00:46,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866769830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:46,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:46,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:46,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555486817] [2021-12-06 21:00:46,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:46,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:46,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:46,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:46,348 INFO L87 Difference]: Start difference. First operand 569 states and 826 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 21:00:48,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:48,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:48,636 INFO L93 Difference]: Finished difference Result 1176 states and 1708 transitions. [2021-12-06 21:00:48,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:48,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 149 [2021-12-06 21:00:48,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:48,639 INFO L225 Difference]: With dead ends: 1176 [2021-12-06 21:00:48,639 INFO L226 Difference]: Without dead ends: 628 [2021-12-06 21:00:48,639 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 21:00:48,640 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 101 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:48,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 338 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 21:00:48,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-12-06 21:00:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 569. [2021-12-06 21:00:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 1.4454225352112675) internal successors, (821), 568 states have internal predecessors, (821), 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 21:00:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 821 transitions. [2021-12-06 21:00:48,650 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 821 transitions. Word has length 149 [2021-12-06 21:00:48,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:48,650 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 821 transitions. [2021-12-06 21:00:48,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 21:00:48,650 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 821 transitions. [2021-12-06 21:00:48,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-06 21:00:48,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:48,651 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:48,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-06 21:00:48,652 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:48,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:48,652 INFO L85 PathProgramCache]: Analyzing trace with hash 111887274, now seen corresponding path program 1 times [2021-12-06 21:00:48,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:48,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136346583] [2021-12-06 21:00:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:48,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 21:00:48,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:48,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136346583] [2021-12-06 21:00:48,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136346583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:48,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:48,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:48,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706227545] [2021-12-06 21:00:48,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:48,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:48,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:48,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:48,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:48,727 INFO L87 Difference]: Start difference. First operand 569 states and 821 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 21:00:50,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:51,008 INFO L93 Difference]: Finished difference Result 1176 states and 1698 transitions. [2021-12-06 21:00:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:51,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 158 [2021-12-06 21:00:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:51,011 INFO L225 Difference]: With dead ends: 1176 [2021-12-06 21:00:51,011 INFO L226 Difference]: Without dead ends: 628 [2021-12-06 21:00:51,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:00:51,012 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 97 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:51,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 338 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 21:00:51,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-12-06 21:00:51,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 566. [2021-12-06 21:00:51,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 1.4424778761061947) internal successors, (815), 565 states have internal predecessors, (815), 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 21:00:51,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 815 transitions. [2021-12-06 21:00:51,027 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 815 transitions. Word has length 158 [2021-12-06 21:00:51,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:51,027 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 815 transitions. [2021-12-06 21:00:51,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 21:00:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 815 transitions. [2021-12-06 21:00:51,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-06 21:00:51,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:51,028 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:51,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-06 21:00:51,029 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:51,029 INFO L85 PathProgramCache]: Analyzing trace with hash 138370680, now seen corresponding path program 1 times [2021-12-06 21:00:51,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:51,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954553566] [2021-12-06 21:00:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:51,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-06 21:00:51,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:51,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954553566] [2021-12-06 21:00:51,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954553566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:51,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:51,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:00:51,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488875656] [2021-12-06 21:00:51,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:51,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:00:51,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:51,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:00:51,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:00:51,114 INFO L87 Difference]: Start difference. First operand 566 states and 815 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 21:00:51,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:51,146 INFO L93 Difference]: Finished difference Result 1650 states and 2389 transitions. [2021-12-06 21:00:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:00:51,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 166 [2021-12-06 21:00:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:51,151 INFO L225 Difference]: With dead ends: 1650 [2021-12-06 21:00:51,151 INFO L226 Difference]: Without dead ends: 1105 [2021-12-06 21:00:51,151 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 21:00:51,152 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 139 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:51,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 557 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:00:51,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-12-06 21:00:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1105. [2021-12-06 21:00:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 1.4420289855072463) internal successors, (1592), 1104 states have internal predecessors, (1592), 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 21:00:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1592 transitions. [2021-12-06 21:00:51,172 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1592 transitions. Word has length 166 [2021-12-06 21:00:51,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:51,172 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 1592 transitions. [2021-12-06 21:00:51,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 21:00:51,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1592 transitions. [2021-12-06 21:00:51,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-06 21:00:51,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:51,174 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:51,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-06 21:00:51,174 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:51,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:51,174 INFO L85 PathProgramCache]: Analyzing trace with hash 234885032, now seen corresponding path program 1 times [2021-12-06 21:00:51,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:51,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232891692] [2021-12-06 21:00:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:51,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 21:00:51,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:51,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232891692] [2021-12-06 21:00:51,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232891692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:51,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:51,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:00:51,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215369031] [2021-12-06 21:00:51,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:51,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:00:51,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:51,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:00:51,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:00:51,247 INFO L87 Difference]: Start difference. First operand 1105 states and 1592 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 21:00:51,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:51,293 INFO L93 Difference]: Finished difference Result 2693 states and 3889 transitions. [2021-12-06 21:00:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:00:51,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-12-06 21:00:51,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:51,299 INFO L225 Difference]: With dead ends: 2693 [2021-12-06 21:00:51,300 INFO L226 Difference]: Without dead ends: 1609 [2021-12-06 21:00:51,300 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 21:00:51,301 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 132 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:51,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 487 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:00:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-12-06 21:00:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1607. [2021-12-06 21:00:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 1.4414694894146949) internal successors, (2315), 1606 states have internal predecessors, (2315), 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 21:00:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 2315 transitions. [2021-12-06 21:00:51,330 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 2315 transitions. Word has length 167 [2021-12-06 21:00:51,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:51,330 INFO L470 AbstractCegarLoop]: Abstraction has 1607 states and 2315 transitions. [2021-12-06 21:00:51,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 21:00:51,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 2315 transitions. [2021-12-06 21:00:51,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-06 21:00:51,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:51,332 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:51,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-06 21:00:51,332 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:51,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:51,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1802673043, now seen corresponding path program 1 times [2021-12-06 21:00:51,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:51,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51549276] [2021-12-06 21:00:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:51,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 21:00:51,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:51,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51549276] [2021-12-06 21:00:51,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51549276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:51,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:51,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:00:51,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272982008] [2021-12-06 21:00:51,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:51,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:00:51,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:51,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:00:51,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:00:51,402 INFO L87 Difference]: Start difference. First operand 1607 states and 2315 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 21:00:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:51,464 INFO L93 Difference]: Finished difference Result 3688 states and 5325 transitions. [2021-12-06 21:00:51,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:00:51,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 168 [2021-12-06 21:00:51,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:51,481 INFO L225 Difference]: With dead ends: 3688 [2021-12-06 21:00:51,481 INFO L226 Difference]: Without dead ends: 2102 [2021-12-06 21:00:51,483 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 21:00:51,483 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 134 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:51,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 503 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:00:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-12-06 21:00:51,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 2098. [2021-12-06 21:00:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 1.4430138292799237) internal successors, (3026), 2097 states have internal predecessors, (3026), 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 21:00:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 3026 transitions. [2021-12-06 21:00:51,523 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 3026 transitions. Word has length 168 [2021-12-06 21:00:51,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:51,523 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 3026 transitions. [2021-12-06 21:00:51,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 21:00:51,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 3026 transitions. [2021-12-06 21:00:51,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-06 21:00:51,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:51,525 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:51,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-06 21:00:51,526 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:51,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:51,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1368167445, now seen corresponding path program 1 times [2021-12-06 21:00:51,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:51,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325550840] [2021-12-06 21:00:51,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:51,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-06 21:00:51,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:51,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325550840] [2021-12-06 21:00:51,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325550840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:51,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:51,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:00:51,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379837201] [2021-12-06 21:00:51,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:51,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:00:51,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:51,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:00:51,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:00:51,596 INFO L87 Difference]: Start difference. First operand 2098 states and 3026 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 21:00:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:51,638 INFO L93 Difference]: Finished difference Result 4202 states and 6064 transitions. [2021-12-06 21:00:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:00:51,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 168 [2021-12-06 21:00:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:51,647 INFO L225 Difference]: With dead ends: 4202 [2021-12-06 21:00:51,647 INFO L226 Difference]: Without dead ends: 2125 [2021-12-06 21:00:51,648 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 21:00:51,649 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:51,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 404 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:00:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2021-12-06 21:00:51,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 2125. [2021-12-06 21:00:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2125 states, 2124 states have (on average 1.4411487758945387) internal successors, (3061), 2124 states have internal predecessors, (3061), 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 21:00:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2125 states to 2125 states and 3061 transitions. [2021-12-06 21:00:51,693 INFO L78 Accepts]: Start accepts. Automaton has 2125 states and 3061 transitions. Word has length 168 [2021-12-06 21:00:51,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:51,693 INFO L470 AbstractCegarLoop]: Abstraction has 2125 states and 3061 transitions. [2021-12-06 21:00:51,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 21:00:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2125 states and 3061 transitions. [2021-12-06 21:00:51,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-06 21:00:51,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:51,696 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:51,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-06 21:00:51,696 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash -995674217, now seen corresponding path program 1 times [2021-12-06 21:00:51,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:51,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280219189] [2021-12-06 21:00:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:51,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 21:00:51,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:51,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280219189] [2021-12-06 21:00:51,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280219189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:51,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:51,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:00:51,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210578656] [2021-12-06 21:00:51,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:51,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:00:51,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:51,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:00:51,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:00:51,767 INFO L87 Difference]: Start difference. First operand 2125 states and 3061 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:51,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:51,814 INFO L93 Difference]: Finished difference Result 4231 states and 6100 transitions. [2021-12-06 21:00:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:00:51,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-12-06 21:00:51,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:51,823 INFO L225 Difference]: With dead ends: 4231 [2021-12-06 21:00:51,823 INFO L226 Difference]: Without dead ends: 2127 [2021-12-06 21:00:51,825 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 21:00:51,825 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:51,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 383 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:00:51,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-12-06 21:00:51,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2127. [2021-12-06 21:00:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2126 states have (on average 1.4407337723424272) internal successors, (3063), 2126 states have internal predecessors, (3063), 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 21:00:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 3063 transitions. [2021-12-06 21:00:51,865 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 3063 transitions. Word has length 168 [2021-12-06 21:00:51,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:51,866 INFO L470 AbstractCegarLoop]: Abstraction has 2127 states and 3063 transitions. [2021-12-06 21:00:51,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:00:51,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 3063 transitions. [2021-12-06 21:00:51,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-06 21:00:51,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:51,868 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:51,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-06 21:00:51,868 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:51,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:51,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1102630147, now seen corresponding path program 1 times [2021-12-06 21:00:51,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:51,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663769699] [2021-12-06 21:00:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:51,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 21:00:51,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:51,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663769699] [2021-12-06 21:00:51,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663769699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:51,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:51,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:51,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203151368] [2021-12-06 21:00:51,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:51,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:51,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:51,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:51,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:51,960 INFO L87 Difference]: Start difference. First operand 2127 states and 3063 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 21:00:53,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:54,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:54,296 INFO L93 Difference]: Finished difference Result 4616 states and 6625 transitions. [2021-12-06 21:00:54,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:54,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 179 [2021-12-06 21:00:54,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:54,302 INFO L225 Difference]: With dead ends: 4616 [2021-12-06 21:00:54,302 INFO L226 Difference]: Without dead ends: 2512 [2021-12-06 21:00:54,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:00:54,304 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 104 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:54,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 346 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 244 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 21:00:54,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-12-06 21:00:54,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2247. [2021-12-06 21:00:54,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 1.4305431878895816) internal successors, (3213), 2246 states have internal predecessors, (3213), 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 21:00:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3213 transitions. [2021-12-06 21:00:54,346 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3213 transitions. Word has length 179 [2021-12-06 21:00:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:54,346 INFO L470 AbstractCegarLoop]: Abstraction has 2247 states and 3213 transitions. [2021-12-06 21:00:54,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 21:00:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3213 transitions. [2021-12-06 21:00:54,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-06 21:00:54,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:54,348 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:54,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-06 21:00:54,349 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:54,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:54,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1645851351, now seen corresponding path program 1 times [2021-12-06 21:00:54,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:54,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532653912] [2021-12-06 21:00:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:54,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 21:00:54,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:54,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532653912] [2021-12-06 21:00:54,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532653912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:54,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:54,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:54,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041295084] [2021-12-06 21:00:54,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:54,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:54,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:54,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:54,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:54,429 INFO L87 Difference]: Start difference. First operand 2247 states and 3213 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 21:00:56,065 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:56,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:56,332 INFO L93 Difference]: Finished difference Result 4556 states and 6513 transitions. [2021-12-06 21:00:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:56,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 180 [2021-12-06 21:00:56,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:56,336 INFO L225 Difference]: With dead ends: 4556 [2021-12-06 21:00:56,336 INFO L226 Difference]: Without dead ends: 2332 [2021-12-06 21:00:56,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:00:56,338 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 59 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:56,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 540 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 21:00:56,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-12-06 21:00:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2247. [2021-12-06 21:00:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 1.429207479964381) internal successors, (3210), 2246 states have internal predecessors, (3210), 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 21:00:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3210 transitions. [2021-12-06 21:00:56,378 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3210 transitions. Word has length 180 [2021-12-06 21:00:56,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:56,379 INFO L470 AbstractCegarLoop]: Abstraction has 2247 states and 3210 transitions. [2021-12-06 21:00:56,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 21:00:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3210 transitions. [2021-12-06 21:00:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-06 21:00:56,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:56,381 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:56,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-06 21:00:56,381 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:56,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1897594940, now seen corresponding path program 1 times [2021-12-06 21:00:56,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:56,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520564696] [2021-12-06 21:00:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:56,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 21:00:56,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:56,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520564696] [2021-12-06 21:00:56,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520564696] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:56,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:56,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:56,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904190462] [2021-12-06 21:00:56,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:56,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:56,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:56,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:56,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:56,496 INFO L87 Difference]: Start difference. First operand 2247 states and 3210 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 21:00:58,409 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:00:58,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:00:58,724 INFO L93 Difference]: Finished difference Result 4688 states and 6683 transitions. [2021-12-06 21:00:58,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:00:58,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 183 [2021-12-06 21:00:58,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:00:58,728 INFO L225 Difference]: With dead ends: 4688 [2021-12-06 21:00:58,728 INFO L226 Difference]: Without dead ends: 2464 [2021-12-06 21:00:58,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:00:58,730 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 105 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:00:58,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 342 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 21:00:58,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2021-12-06 21:00:58,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2247. [2021-12-06 21:00:58,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 1.4158504007123776) internal successors, (3180), 2246 states have internal predecessors, (3180), 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 21:00:58,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3180 transitions. [2021-12-06 21:00:58,780 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3180 transitions. Word has length 183 [2021-12-06 21:00:58,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:00:58,780 INFO L470 AbstractCegarLoop]: Abstraction has 2247 states and 3180 transitions. [2021-12-06 21:00:58,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 21:00:58,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3180 transitions. [2021-12-06 21:00:58,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-06 21:00:58,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:00:58,783 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:00:58,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-06 21:00:58,783 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:00:58,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:00:58,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1707338316, now seen corresponding path program 1 times [2021-12-06 21:00:58,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:00:58,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803606922] [2021-12-06 21:00:58,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:00:58,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:00:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:00:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-06 21:00:58,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:00:58,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803606922] [2021-12-06 21:00:58,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803606922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:00:58,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:00:58,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:00:58,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390098411] [2021-12-06 21:00:58,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:00:58,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:00:58,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:00:58,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:00:58,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:00:58,860 INFO L87 Difference]: Start difference. First operand 2247 states and 3180 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 21:01:00,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:01:01,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:01:01,060 INFO L93 Difference]: Finished difference Result 4526 states and 6402 transitions. [2021-12-06 21:01:01,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:01:01,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 189 [2021-12-06 21:01:01,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:01:01,063 INFO L225 Difference]: With dead ends: 4526 [2021-12-06 21:01:01,063 INFO L226 Difference]: Without dead ends: 2302 [2021-12-06 21:01:01,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:01:01,065 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 43 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:01:01,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 560 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 21:01:01,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-12-06 21:01:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 2247. [2021-12-06 21:01:01,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 1.4145146927871772) internal successors, (3177), 2246 states have internal predecessors, (3177), 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 21:01:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3177 transitions. [2021-12-06 21:01:01,108 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3177 transitions. Word has length 189 [2021-12-06 21:01:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:01,109 INFO L470 AbstractCegarLoop]: Abstraction has 2247 states and 3177 transitions. [2021-12-06 21:01:01,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 21:01:01,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3177 transitions. [2021-12-06 21:01:01,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-06 21:01:01,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:01,111 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:01:01,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-06 21:01:01,111 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:01,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:01,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1760759993, now seen corresponding path program 1 times [2021-12-06 21:01:01,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:01:01,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863832637] [2021-12-06 21:01:01,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:01,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:01:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-06 21:01:01,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:01:01,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863832637] [2021-12-06 21:01:01,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863832637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:01:01,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:01:01,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:01:01,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484341319] [2021-12-06 21:01:01,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:01:01,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:01:01,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:01:01,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:01:01,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:01:01,188 INFO L87 Difference]: Start difference. First operand 2247 states and 3177 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 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 21:01:03,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:01:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:01:03,446 INFO L93 Difference]: Finished difference Result 4556 states and 6446 transitions. [2021-12-06 21:01:03,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:01:03,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 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 189 [2021-12-06 21:01:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:01:03,449 INFO L225 Difference]: With dead ends: 4556 [2021-12-06 21:01:03,449 INFO L226 Difference]: Without dead ends: 2332 [2021-12-06 21:01:03,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:01:03,451 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 37 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:01:03,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 538 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 191 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 21:01:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-12-06 21:01:03,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2247. [2021-12-06 21:01:03,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 1.41273374888691) internal successors, (3173), 2246 states have internal predecessors, (3173), 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 21:01:03,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3173 transitions. [2021-12-06 21:01:03,489 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3173 transitions. Word has length 189 [2021-12-06 21:01:03,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:03,489 INFO L470 AbstractCegarLoop]: Abstraction has 2247 states and 3173 transitions. [2021-12-06 21:01:03,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 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 21:01:03,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3173 transitions. [2021-12-06 21:01:03,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-06 21:01:03,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:03,491 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 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] [2021-12-06 21:01:03,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-06 21:01:03,492 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:03,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:03,492 INFO L85 PathProgramCache]: Analyzing trace with hash 867563374, now seen corresponding path program 1 times [2021-12-06 21:01:03,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:01:03,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291314921] [2021-12-06 21:01:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:03,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:01:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-12-06 21:01:03,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:01:03,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291314921] [2021-12-06 21:01:03,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291314921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:01:03,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:01:03,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:01:03,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012964891] [2021-12-06 21:01:03,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:01:03,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:01:03,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:01:03,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:01:03,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:01:03,763 INFO L87 Difference]: Start difference. First operand 2247 states and 3173 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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 21:01:05,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:01:06,896 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 21:01:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:01:07,218 INFO L93 Difference]: Finished difference Result 4491 states and 6342 transitions. [2021-12-06 21:01:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:01:07,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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 191 [2021-12-06 21:01:07,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:01:07,221 INFO L225 Difference]: With dead ends: 4491 [2021-12-06 21:01:07,221 INFO L226 Difference]: Without dead ends: 2247 [2021-12-06 21:01:07,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:01:07,223 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 7 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:01:07,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 647 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-06 21:01:07,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2021-12-06 21:01:07,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 2247. [2021-12-06 21:01:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 1.4122885129118432) internal successors, (3172), 2246 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 21:01:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3172 transitions. [2021-12-06 21:01:07,274 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3172 transitions. Word has length 191 [2021-12-06 21:01:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:01:07,275 INFO L470 AbstractCegarLoop]: Abstraction has 2247 states and 3172 transitions. [2021-12-06 21:01:07,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 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 21:01:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3172 transitions. [2021-12-06 21:01:07,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-06 21:01:07,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:01:07,277 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 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] [2021-12-06 21:01:07,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-06 21:01:07,277 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:01:07,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:01:07,278 INFO L85 PathProgramCache]: Analyzing trace with hash 990845040, now seen corresponding path program 1 times [2021-12-06 21:01:07,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:01:07,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004287496] [2021-12-06 21:01:07,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:07,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:01:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 6 proven. 206 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 21:01:08,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:01:08,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004287496] [2021-12-06 21:01:08,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004287496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:01:08,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355080362] [2021-12-06 21:01:08,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:01:08,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:01:08,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:01:08,240 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:01:08,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b973827d-bc10-4201-8def-5e2e221989e7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:01:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:01:08,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 176 conjunts are in the unsatisfiable core [2021-12-06 21:01:08,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:01:09,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 211434 treesize of output 201625 [2021-12-06 21:01:09,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 171024 treesize of output 113916 [2021-12-06 21:01:09,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 16 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46868 treesize of output 46887 [2021-12-06 21:01:09,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36422 treesize of output 36441 [2021-12-06 21:01:09,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:01:09,674 INFO L354 Elim1Store]: treesize reduction 138, result has 16.9 percent of original size [2021-12-06 21:01:09,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 41038 treesize of output 13425 [2021-12-06 21:01:09,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:02:27,634 INFO L244 Elim1Store]: Index analysis took 5414 ms