./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX --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 3bc3edc5b41c709765acde9978c91c5bce55372e37ee7403b6f2103b9547cfa5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:52:04,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:52:04,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:52:04,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:52:04,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:52:04,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:52:04,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:52:04,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:52:04,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:52:04,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:52:04,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:52:04,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:52:04,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:52:04,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:52:04,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:52:04,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:52:04,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:52:04,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:52:04,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:52:04,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:52:04,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:52:04,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:52:04,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:52:04,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:52:04,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:52:04,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:52:04,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:52:04,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:52:04,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:52:04,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:52:04,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:52:04,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:52:04,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:52:04,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:52:04,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:52:04,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:52:04,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:52:04,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:52:04,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:52:04,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:52:04,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:52:04,616 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:52:04,664 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:52:04,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:52:04,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:52:04,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:52:04,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:52:04,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:52:04,668 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:52:04,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:52:04,669 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:52:04,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:52:04,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:52:04,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:52:04,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:52:04,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:52:04,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:52:04,672 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:52:04,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:52:04,673 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:52:04,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:52:04,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:52:04,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:52:04,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:52:04,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:52:04,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:52:04,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:52:04,675 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:52:04,675 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:52:04,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:52:04,675 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:52:04,676 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:52:04,676 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:52:04,676 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:52:04,677 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_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bc3edc5b41c709765acde9978c91c5bce55372e37ee7403b6f2103b9547cfa5 [2021-11-09 09:52:05,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:52:05,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:52:05,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:52:05,065 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:52:05,066 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:52:05,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-09 09:52:05,157 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX/data/b97095b9b/1a5749ef0d7b48e6ad8acf2d9c584b97/FLAG28eed6908 [2021-11-09 09:52:05,846 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:52:05,847 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-09 09:52:05,891 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX/data/b97095b9b/1a5749ef0d7b48e6ad8acf2d9c584b97/FLAG28eed6908 [2021-11-09 09:52:06,062 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX/data/b97095b9b/1a5749ef0d7b48e6ad8acf2d9c584b97 [2021-11-09 09:52:06,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:52:06,075 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:52:06,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:52:06,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:52:06,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:52:06,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:52:06" (1/1) ... [2021-11-09 09:52:06,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30ce3bac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:06, skipping insertion in model container [2021-11-09 09:52:06,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:52:06" (1/1) ... [2021-11-09 09:52:06,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:52:06,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:52:06,970 WARN L228 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_528beb96-d0c0-4f1f-9d83-2a975069a00a/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[31343,31356] [2021-11-09 09:52:07,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:52:07,254 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:52:07,749 WARN L228 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_528beb96-d0c0-4f1f-9d83-2a975069a00a/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[31343,31356] [2021-11-09 09:52:07,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:52:07,975 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:52:07,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:07 WrapperNode [2021-11-09 09:52:07,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:52:07,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:52:07,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:52:07,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:52:07,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:07" (1/1) ... [2021-11-09 09:52:08,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:07" (1/1) ... [2021-11-09 09:52:08,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:52:08,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:52:08,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:52:08,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:52:08,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:07" (1/1) ... [2021-11-09 09:52:08,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:07" (1/1) ... [2021-11-09 09:52:08,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:07" (1/1) ... [2021-11-09 09:52:08,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:07" (1/1) ... [2021-11-09 09:52:08,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:07" (1/1) ... [2021-11-09 09:52:08,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:07" (1/1) ... [2021-11-09 09:52:08,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:07" (1/1) ... [2021-11-09 09:52:08,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:52:08,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:52:08,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:52:08,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:52:08,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:07" (1/1) ... [2021-11-09 09:52:08,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:52:08,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:08,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:52:08,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_528beb96-d0c0-4f1f-9d83-2a975069a00a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:52:08,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:52:08,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:52:08,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:52:08,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:52:11,394 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:52:11,399 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-09 09:52:11,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:52:11 BoogieIcfgContainer [2021-11-09 09:52:11,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:52:11,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:52:11,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:52:11,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:52:11,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:52:06" (1/3) ... [2021-11-09 09:52:11,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74fa6864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:52:11, skipping insertion in model container [2021-11-09 09:52:11,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:07" (2/3) ... [2021-11-09 09:52:11,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74fa6864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:52:11, skipping insertion in model container [2021-11-09 09:52:11,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:52:11" (3/3) ... [2021-11-09 09:52:11,418 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-09 09:52:11,432 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:52:11,433 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:52:11,516 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:52:11,527 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 [2021-11-09 09:52:11,528 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:52:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 716 states, 714 states have (on average 1.7913165266106443) internal successors, (1279), 715 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-09 09:52:11,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:11,624 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:11,625 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:11,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:11,632 INFO L85 PathProgramCache]: Analyzing trace with hash -11509125, now seen corresponding path program 1 times [2021-11-09 09:52:11,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:11,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253961621] [2021-11-09 09:52:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:11,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:12,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:12,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253961621] [2021-11-09 09:52:12,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253961621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:12,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:12,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:52:12,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822655267] [2021-11-09 09:52:12,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:52:12,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:12,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:52:12,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:52:12,650 INFO L87 Difference]: Start difference. First operand has 716 states, 714 states have (on average 1.7913165266106443) internal successors, (1279), 715 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:12,971 INFO L93 Difference]: Finished difference Result 1340 states and 2378 transitions. [2021-11-09 09:52:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:52:12,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 306 [2021-11-09 09:52:12,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:13,017 INFO L225 Difference]: With dead ends: 1340 [2021-11-09 09:52:13,017 INFO L226 Difference]: Without dead ends: 1149 [2021-11-09 09:52:13,026 INFO L786 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 [2021-11-09 09:52:13,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-11-09 09:52:13,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2021-11-09 09:52:13,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.549738219895288) internal successors, (1776), 1146 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1776 transitions. [2021-11-09 09:52:13,245 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1776 transitions. Word has length 306 [2021-11-09 09:52:13,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:13,251 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1776 transitions. [2021-11-09 09:52:13,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:13,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1776 transitions. [2021-11-09 09:52:13,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-09 09:52:13,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:13,263 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:13,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:52:13,264 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:13,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:13,269 INFO L85 PathProgramCache]: Analyzing trace with hash 9983315, now seen corresponding path program 1 times [2021-11-09 09:52:13,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:13,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421413909] [2021-11-09 09:52:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:13,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:14,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:14,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421413909] [2021-11-09 09:52:14,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421413909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:14,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:14,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:52:14,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820830529] [2021-11-09 09:52:14,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:52:14,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:14,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:52:14,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:52:14,226 INFO L87 Difference]: Start difference. First operand 1147 states and 1776 transitions. Second operand has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:14,548 INFO L93 Difference]: Finished difference Result 3393 states and 5247 transitions. [2021-11-09 09:52:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:52:14,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 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 306 [2021-11-09 09:52:14,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:14,571 INFO L225 Difference]: With dead ends: 3393 [2021-11-09 09:52:14,572 INFO L226 Difference]: Without dead ends: 2257 [2021-11-09 09:52:14,580 INFO L786 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 [2021-11-09 09:52:14,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-11-09 09:52:14,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2255. [2021-11-09 09:52:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2254 states have (on average 1.5394853593611357) internal successors, (3470), 2254 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:14,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 3470 transitions. [2021-11-09 09:52:14,732 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 3470 transitions. Word has length 306 [2021-11-09 09:52:14,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:14,733 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 3470 transitions. [2021-11-09 09:52:14,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.5) internal successors, (306), 4 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 3470 transitions. [2021-11-09 09:52:14,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-09 09:52:14,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:14,746 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:14,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:52:14,747 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:14,761 INFO L85 PathProgramCache]: Analyzing trace with hash 744703452, now seen corresponding path program 1 times [2021-11-09 09:52:14,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:14,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671825651] [2021-11-09 09:52:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:14,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:14,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:14,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671825651] [2021-11-09 09:52:14,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671825651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:14,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:14,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:52:15,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056766388] [2021-11-09 09:52:15,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:52:15,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:15,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:52:15,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:52:15,005 INFO L87 Difference]: Start difference. First operand 2255 states and 3470 transitions. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:15,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:15,376 INFO L93 Difference]: Finished difference Result 6558 states and 10054 transitions. [2021-11-09 09:52:15,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:52:15,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 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 308 [2021-11-09 09:52:15,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:15,411 INFO L225 Difference]: With dead ends: 6558 [2021-11-09 09:52:15,411 INFO L226 Difference]: Without dead ends: 4428 [2021-11-09 09:52:15,416 INFO L786 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 [2021-11-09 09:52:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4428 states. [2021-11-09 09:52:15,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4428 to 4426. [2021-11-09 09:52:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4425 states have (on average 1.5301694915254238) internal successors, (6771), 4425 states have internal predecessors, (6771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 6771 transitions. [2021-11-09 09:52:15,782 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 6771 transitions. Word has length 308 [2021-11-09 09:52:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:15,783 INFO L470 AbstractCegarLoop]: Abstraction has 4426 states and 6771 transitions. [2021-11-09 09:52:15,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 6771 transitions. [2021-11-09 09:52:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-09 09:52:15,799 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:15,800 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:15,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:52:15,800 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:15,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:15,802 INFO L85 PathProgramCache]: Analyzing trace with hash -40112607, now seen corresponding path program 1 times [2021-11-09 09:52:15,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:15,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805729678] [2021-11-09 09:52:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:15,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:15,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:15,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805729678] [2021-11-09 09:52:15,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805729678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:15,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:15,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:52:15,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121169005] [2021-11-09 09:52:15,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:52:15,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:15,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:52:15,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:52:15,910 INFO L87 Difference]: Start difference. First operand 4426 states and 6771 transitions. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:16,525 INFO L93 Difference]: Finished difference Result 13211 states and 20197 transitions. [2021-11-09 09:52:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:52:16,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 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 308 [2021-11-09 09:52:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:16,589 INFO L225 Difference]: With dead ends: 13211 [2021-11-09 09:52:16,590 INFO L226 Difference]: Without dead ends: 8823 [2021-11-09 09:52:16,603 INFO L786 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 [2021-11-09 09:52:16,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8823 states. [2021-11-09 09:52:17,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8823 to 4445. [2021-11-09 09:52:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4445 states, 4444 states have (on average 1.52992799279928) internal successors, (6799), 4444 states have internal predecessors, (6799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4445 states to 4445 states and 6799 transitions. [2021-11-09 09:52:17,111 INFO L78 Accepts]: Start accepts. Automaton has 4445 states and 6799 transitions. Word has length 308 [2021-11-09 09:52:17,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:17,112 INFO L470 AbstractCegarLoop]: Abstraction has 4445 states and 6799 transitions. [2021-11-09 09:52:17,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:17,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4445 states and 6799 transitions. [2021-11-09 09:52:17,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-11-09 09:52:17,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:17,129 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:17,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:52:17,130 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:17,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:17,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1460416733, now seen corresponding path program 1 times [2021-11-09 09:52:17,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:17,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336996484] [2021-11-09 09:52:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:17,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:17,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:17,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336996484] [2021-11-09 09:52:17,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336996484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:17,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:17,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:52:17,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309710333] [2021-11-09 09:52:17,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:52:17,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:17,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:52:17,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:52:17,222 INFO L87 Difference]: Start difference. First operand 4445 states and 6799 transitions. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:17,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:17,911 INFO L93 Difference]: Finished difference Result 13230 states and 20218 transitions. [2021-11-09 09:52:17,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:52:17,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 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 309 [2021-11-09 09:52:17,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:17,997 INFO L225 Difference]: With dead ends: 13230 [2021-11-09 09:52:17,997 INFO L226 Difference]: Without dead ends: 8841 [2021-11-09 09:52:18,006 INFO L786 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 [2021-11-09 09:52:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8841 states. [2021-11-09 09:52:18,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8841 to 4463. [2021-11-09 09:52:18,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 1.5284625728372927) internal successors, (6820), 4462 states have internal predecessors, (6820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 6820 transitions. [2021-11-09 09:52:18,562 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 6820 transitions. Word has length 309 [2021-11-09 09:52:18,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:18,563 INFO L470 AbstractCegarLoop]: Abstraction has 4463 states and 6820 transitions. [2021-11-09 09:52:18,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:18,564 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 6820 transitions. [2021-11-09 09:52:18,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-09 09:52:18,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:18,583 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:18,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:52:18,584 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:18,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:18,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1746264407, now seen corresponding path program 1 times [2021-11-09 09:52:18,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:18,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997826982] [2021-11-09 09:52:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:18,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:18,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:18,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997826982] [2021-11-09 09:52:18,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997826982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:18,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:18,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:52:18,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308156648] [2021-11-09 09:52:18,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:52:18,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:18,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:52:18,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:52:18,775 INFO L87 Difference]: Start difference. First operand 4463 states and 6820 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:19,649 INFO L93 Difference]: Finished difference Result 12890 states and 19621 transitions. [2021-11-09 09:52:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:52:19,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 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 310 [2021-11-09 09:52:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:19,682 INFO L225 Difference]: With dead ends: 12890 [2021-11-09 09:52:19,683 INFO L226 Difference]: Without dead ends: 8668 [2021-11-09 09:52:19,694 INFO L786 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 [2021-11-09 09:52:19,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8668 states. [2021-11-09 09:52:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8668 to 8666. [2021-11-09 09:52:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8666 states, 8665 states have (on average 1.5169070975187535) internal successors, (13144), 8665 states have internal predecessors, (13144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8666 states to 8666 states and 13144 transitions. [2021-11-09 09:52:20,482 INFO L78 Accepts]: Start accepts. Automaton has 8666 states and 13144 transitions. Word has length 310 [2021-11-09 09:52:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:20,483 INFO L470 AbstractCegarLoop]: Abstraction has 8666 states and 13144 transitions. [2021-11-09 09:52:20,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:20,484 INFO L276 IsEmpty]: Start isEmpty. Operand 8666 states and 13144 transitions. [2021-11-09 09:52:20,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-09 09:52:20,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:20,510 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:20,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:52:20,511 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:20,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:20,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1678255860, now seen corresponding path program 1 times [2021-11-09 09:52:20,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:20,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172971877] [2021-11-09 09:52:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:20,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:20,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:20,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172971877] [2021-11-09 09:52:20,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172971877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:20,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:20,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:52:20,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746063734] [2021-11-09 09:52:20,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:52:20,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:20,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:52:20,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:52:20,997 INFO L87 Difference]: Start difference. First operand 8666 states and 13144 transitions. Second operand has 5 states, 5 states have (on average 62.0) internal successors, (310), 5 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:22,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:22,287 INFO L93 Difference]: Finished difference Result 25452 states and 38529 transitions. [2021-11-09 09:52:22,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:52:22,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 62.0) internal successors, (310), 5 states have internal predecessors, (310), 0 states have call successors, (0), 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 310 [2021-11-09 09:52:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:22,353 INFO L225 Difference]: With dead ends: 25452 [2021-11-09 09:52:22,353 INFO L226 Difference]: Without dead ends: 16841 [2021-11-09 09:52:22,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:52:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16841 states. [2021-11-09 09:52:23,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16841 to 16839. [2021-11-09 09:52:23,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16839 states, 16838 states have (on average 1.504276042285307) internal successors, (25329), 16838 states have internal predecessors, (25329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16839 states to 16839 states and 25329 transitions. [2021-11-09 09:52:23,827 INFO L78 Accepts]: Start accepts. Automaton has 16839 states and 25329 transitions. Word has length 310 [2021-11-09 09:52:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:23,827 INFO L470 AbstractCegarLoop]: Abstraction has 16839 states and 25329 transitions. [2021-11-09 09:52:23,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.0) internal successors, (310), 5 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 16839 states and 25329 transitions. [2021-11-09 09:52:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-09 09:52:23,879 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:23,879 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:23,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:52:23,880 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:23,881 INFO L85 PathProgramCache]: Analyzing trace with hash -866699209, now seen corresponding path program 1 times [2021-11-09 09:52:23,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:23,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763437726] [2021-11-09 09:52:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:23,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:24,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:24,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763437726] [2021-11-09 09:52:24,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763437726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:24,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:24,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:52:24,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77282989] [2021-11-09 09:52:24,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:52:24,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:24,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:52:24,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:52:24,039 INFO L87 Difference]: Start difference. First operand 16839 states and 25329 transitions. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:25,835 INFO L93 Difference]: Finished difference Result 49273 states and 73930 transitions. [2021-11-09 09:52:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:52:25,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 312 [2021-11-09 09:52:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:25,947 INFO L225 Difference]: With dead ends: 49273 [2021-11-09 09:52:25,947 INFO L226 Difference]: Without dead ends: 32951 [2021-11-09 09:52:25,980 INFO L786 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 [2021-11-09 09:52:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32951 states. [2021-11-09 09:52:28,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32951 to 32949. [2021-11-09 09:52:28,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32949 states, 32948 states have (on average 1.4935656185504431) internal successors, (49210), 32948 states have internal predecessors, (49210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32949 states to 32949 states and 49210 transitions. [2021-11-09 09:52:28,228 INFO L78 Accepts]: Start accepts. Automaton has 32949 states and 49210 transitions. Word has length 312 [2021-11-09 09:52:28,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:28,229 INFO L470 AbstractCegarLoop]: Abstraction has 32949 states and 49210 transitions. [2021-11-09 09:52:28,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:28,230 INFO L276 IsEmpty]: Start isEmpty. Operand 32949 states and 49210 transitions. [2021-11-09 09:52:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-09 09:52:28,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:28,327 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:28,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:52:28,328 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:28,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:28,329 INFO L85 PathProgramCache]: Analyzing trace with hash -2006433516, now seen corresponding path program 1 times [2021-11-09 09:52:28,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:28,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274445775] [2021-11-09 09:52:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:28,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:28,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:28,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274445775] [2021-11-09 09:52:28,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274445775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:28,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:28,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:52:28,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322776153] [2021-11-09 09:52:28,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:52:28,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:28,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:52:28,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:52:28,816 INFO L87 Difference]: Start difference. First operand 32949 states and 49210 transitions. Second operand has 5 states, 5 states have (on average 62.4) internal successors, (312), 5 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:32,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:32,613 INFO L93 Difference]: Finished difference Result 97388 states and 145228 transitions. [2021-11-09 09:52:32,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:52:32,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 62.4) internal successors, (312), 5 states have internal predecessors, (312), 0 states have call successors, (0), 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 312 [2021-11-09 09:52:32,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:32,840 INFO L225 Difference]: With dead ends: 97388 [2021-11-09 09:52:32,841 INFO L226 Difference]: Without dead ends: 64590 [2021-11-09 09:52:32,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:52:32,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64590 states. [2021-11-09 09:52:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64590 to 64588. [2021-11-09 09:52:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64588 states, 64587 states have (on average 1.4821558517968012) internal successors, (95728), 64587 states have internal predecessors, (95728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64588 states to 64588 states and 95728 transitions. [2021-11-09 09:52:37,238 INFO L78 Accepts]: Start accepts. Automaton has 64588 states and 95728 transitions. Word has length 312 [2021-11-09 09:52:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:37,239 INFO L470 AbstractCegarLoop]: Abstraction has 64588 states and 95728 transitions. [2021-11-09 09:52:37,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.4) internal successors, (312), 5 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:37,240 INFO L276 IsEmpty]: Start isEmpty. Operand 64588 states and 95728 transitions. [2021-11-09 09:52:37,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-09 09:52:37,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:37,409 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:37,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 09:52:37,409 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:37,410 INFO L85 PathProgramCache]: Analyzing trace with hash -807196812, now seen corresponding path program 1 times [2021-11-09 09:52:37,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:37,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683559915] [2021-11-09 09:52:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:37,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:38,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:38,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683559915] [2021-11-09 09:52:38,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683559915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:38,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:38,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:52:38,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600051163] [2021-11-09 09:52:38,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:52:38,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:38,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:52:38,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:52:38,040 INFO L87 Difference]: Start difference. First operand 64588 states and 95728 transitions. Second operand has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:44,429 INFO L93 Difference]: Finished difference Result 190727 states and 282245 transitions. [2021-11-09 09:52:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:52:44,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 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 312 [2021-11-09 09:52:44,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:44,834 INFO L225 Difference]: With dead ends: 190727 [2021-11-09 09:52:44,834 INFO L226 Difference]: Without dead ends: 126421 [2021-11-09 09:52:44,969 INFO L786 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 [2021-11-09 09:52:45,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126421 states. [2021-11-09 09:52:52,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126421 to 126419. [2021-11-09 09:52:52,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126419 states, 126418 states have (on average 1.4699172586182347) internal successors, (185824), 126418 states have internal predecessors, (185824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:53,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126419 states to 126419 states and 185824 transitions. [2021-11-09 09:52:53,581 INFO L78 Accepts]: Start accepts. Automaton has 126419 states and 185824 transitions. Word has length 312 [2021-11-09 09:52:53,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:53,582 INFO L470 AbstractCegarLoop]: Abstraction has 126419 states and 185824 transitions. [2021-11-09 09:52:53,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:52:53,583 INFO L276 IsEmpty]: Start isEmpty. Operand 126419 states and 185824 transitions. [2021-11-09 09:52:53,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-11-09 09:52:53,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:53,765 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:53,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:52:53,766 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:52:53,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:53,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1923764620, now seen corresponding path program 1 times [2021-11-09 09:52:53,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:53,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405204758] [2021-11-09 09:52:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:53,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:53,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:53,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405204758] [2021-11-09 09:52:53,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405204758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:53,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:53,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:52:53,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310513331] [2021-11-09 09:52:53,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:52:53,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:53,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:52:53,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:52:53,902 INFO L87 Difference]: Start difference. First operand 126419 states and 185824 transitions. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)