./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label22.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label22.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ --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 f365a0f129fa90e96f59a2a67efc46f6bd75f705664f3dab23b0f5e5824e9e07 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 11:01:05,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:01:05,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:01:05,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:01:05,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:01:05,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:01:05,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:01:05,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:01:05,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:01:05,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:01:05,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:01:05,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:01:05,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:01:05,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:01:05,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:01:05,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:01:05,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:01:05,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:01:05,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:01:05,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:01:05,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:01:05,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:01:05,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:01:05,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:01:05,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:01:05,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:01:05,862 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:01:05,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:01:05,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:01:05,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:01:05,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:01:05,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:01:05,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:01:05,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:01:05,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:01:05,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:01:05,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:01:05,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:01:05,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:01:05,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:01:05,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:01:05,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 11:01:05,926 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:01:05,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:01:05,927 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:01:05,927 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:01:05,928 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:01:05,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:01:05,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:01:05,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:01:05,930 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:01:05,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:01:05,932 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:01:05,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:01:05,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:01:05,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:01:05,933 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 11:01:05,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:01:05,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 11:01:05,934 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:01:05,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 11:01:05,934 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:01:05,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 11:01:05,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:01:05,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:01:05,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:01:05,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:01:05,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:01:05,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:01:05,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 11:01:05,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:01:05,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:01:05,947 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 11:01:05,948 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 11:01:05,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 11:01:05,948 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_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f365a0f129fa90e96f59a2a67efc46f6bd75f705664f3dab23b0f5e5824e9e07 [2022-10-17 11:01:06,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:01:06,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:01:06,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:01:06,267 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:01:06,268 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:01:06,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/eca-rers2012/Problem03_label22.c [2022-10-17 11:01:06,333 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/data/97f65ab5a/9a03392fef2b44f5ad505f66b73f787b/FLAGc86b26a69 [2022-10-17 11:01:06,983 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:01:06,985 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/sv-benchmarks/c/eca-rers2012/Problem03_label22.c [2022-10-17 11:01:07,008 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/data/97f65ab5a/9a03392fef2b44f5ad505f66b73f787b/FLAGc86b26a69 [2022-10-17 11:01:07,146 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/data/97f65ab5a/9a03392fef2b44f5ad505f66b73f787b [2022-10-17 11:01:07,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:01:07,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:01:07,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:01:07,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:01:07,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:01:07,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:01:07" (1/1) ... [2022-10-17 11:01:07,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7445bcda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:07, skipping insertion in model container [2022-10-17 11:01:07,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:01:07" (1/1) ... [2022-10-17 11:01:07,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:01:07,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:01:07,852 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/sv-benchmarks/c/eca-rers2012/Problem03_label22.c[56764,56777] [2022-10-17 11:01:07,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:01:07,894 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:01:08,213 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/sv-benchmarks/c/eca-rers2012/Problem03_label22.c[56764,56777] [2022-10-17 11:01:08,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:01:08,255 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:01:08,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:08 WrapperNode [2022-10-17 11:01:08,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:01:08,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:01:08,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:01:08,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:01:08,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:08" (1/1) ... [2022-10-17 11:01:08,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:08" (1/1) ... [2022-10-17 11:01:08,435 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-10-17 11:01:08,435 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:01:08,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:01:08,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:01:08,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:01:08,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:08" (1/1) ... [2022-10-17 11:01:08,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:08" (1/1) ... [2022-10-17 11:01:08,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:08" (1/1) ... [2022-10-17 11:01:08,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:08" (1/1) ... [2022-10-17 11:01:08,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:08" (1/1) ... [2022-10-17 11:01:08,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:08" (1/1) ... [2022-10-17 11:01:08,547 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:08" (1/1) ... [2022-10-17 11:01:08,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:08" (1/1) ... [2022-10-17 11:01:08,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:01:08,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:01:08,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:01:08,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:01:08,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:08" (1/1) ... [2022-10-17 11:01:08,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:01:08,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:01:08,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:01:08,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:01:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:01:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 11:01:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:01:08,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:01:08,756 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:01:08,759 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:01:11,089 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:01:11,112 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:01:11,112 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 11:01:11,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:01:11 BoogieIcfgContainer [2022-10-17 11:01:11,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:01:11,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:01:11,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:01:11,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:01:11,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:01:07" (1/3) ... [2022-10-17 11:01:11,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a383cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:01:11, skipping insertion in model container [2022-10-17 11:01:11,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:01:08" (2/3) ... [2022-10-17 11:01:11,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a383cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:01:11, skipping insertion in model container [2022-10-17 11:01:11,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:01:11" (3/3) ... [2022-10-17 11:01:11,132 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label22.c [2022-10-17 11:01:11,160 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:01:11,160 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 11:01:11,271 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:01:11,290 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@667d93f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:01:11,291 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 11:01:11,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:11,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-10-17 11:01:11,328 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:11,329 INFO L195 NwaCegarLoop]: 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] [2022-10-17 11:01:11,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:11,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:11,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1133598669, now seen corresponding path program 1 times [2022-10-17 11:01:11,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:11,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174400537] [2022-10-17 11:01:11,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:11,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:12,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:12,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174400537] [2022-10-17 11:01:12,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174400537] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:12,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:12,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:01:12,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181422747] [2022-10-17 11:01:12,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:12,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:01:12,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:12,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:01:12,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:12,676 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:14,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:14,148 INFO L93 Difference]: Finished difference Result 833 states and 1474 transitions. [2022-10-17 11:01:14,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:01:14,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2022-10-17 11:01:14,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:14,179 INFO L225 Difference]: With dead ends: 833 [2022-10-17 11:01:14,180 INFO L226 Difference]: Without dead ends: 454 [2022-10-17 11:01:14,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:14,196 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 124 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:14,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 163 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-10-17 11:01:14,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-10-17 11:01:14,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 450. [2022-10-17 11:01:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.55902004454343) internal successors, (700), 449 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 700 transitions. [2022-10-17 11:01:14,281 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 700 transitions. Word has length 167 [2022-10-17 11:01:14,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:14,283 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 700 transitions. [2022-10-17 11:01:14,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:14,283 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 700 transitions. [2022-10-17 11:01:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-10-17 11:01:14,288 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:14,288 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:14,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 11:01:14,289 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:14,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:14,290 INFO L85 PathProgramCache]: Analyzing trace with hash 325593383, now seen corresponding path program 1 times [2022-10-17 11:01:14,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:14,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010621206] [2022-10-17 11:01:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:14,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:14,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:14,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010621206] [2022-10-17 11:01:14,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010621206] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:14,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:14,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:01:14,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387435229] [2022-10-17 11:01:14,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:14,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:01:14,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:14,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:01:14,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:14,881 INFO L87 Difference]: Start difference. First operand 450 states and 700 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:15,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:15,871 INFO L93 Difference]: Finished difference Result 1337 states and 2085 transitions. [2022-10-17 11:01:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:01:15,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 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 173 [2022-10-17 11:01:15,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:15,879 INFO L225 Difference]: With dead ends: 1337 [2022-10-17 11:01:15,879 INFO L226 Difference]: Without dead ends: 889 [2022-10-17 11:01:15,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:15,883 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:15,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 104 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 11:01:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-10-17 11:01:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 885. [2022-10-17 11:01:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 1.5429864253393666) internal successors, (1364), 884 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1364 transitions. [2022-10-17 11:01:15,951 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1364 transitions. Word has length 173 [2022-10-17 11:01:15,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:15,954 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1364 transitions. [2022-10-17 11:01:15,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:15,955 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1364 transitions. [2022-10-17 11:01:15,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-10-17 11:01:15,973 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:15,974 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:15,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 11:01:15,976 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:15,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1446106020, now seen corresponding path program 1 times [2022-10-17 11:01:15,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:15,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73017946] [2022-10-17 11:01:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:15,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:16,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:16,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73017946] [2022-10-17 11:01:16,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73017946] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:16,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:16,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:01:16,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307667743] [2022-10-17 11:01:16,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:16,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:01:16,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:16,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:01:16,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:16,295 INFO L87 Difference]: Start difference. First operand 885 states and 1364 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:17,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:17,338 INFO L93 Difference]: Finished difference Result 2599 states and 4012 transitions. [2022-10-17 11:01:17,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:01:17,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2022-10-17 11:01:17,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:17,351 INFO L225 Difference]: With dead ends: 2599 [2022-10-17 11:01:17,351 INFO L226 Difference]: Without dead ends: 1716 [2022-10-17 11:01:17,353 INFO L412 NwaCegarLoop]: 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 [2022-10-17 11:01:17,354 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 258 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:17,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 134 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 11:01:17,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-10-17 11:01:17,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1714. [2022-10-17 11:01:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.4687682428488034) internal successors, (2516), 1713 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:17,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2516 transitions. [2022-10-17 11:01:17,434 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2516 transitions. Word has length 180 [2022-10-17 11:01:17,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:17,434 INFO L495 AbstractCegarLoop]: Abstraction has 1714 states and 2516 transitions. [2022-10-17 11:01:17,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2516 transitions. [2022-10-17 11:01:17,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-10-17 11:01:17,442 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:17,442 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:17,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 11:01:17,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:17,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:17,445 INFO L85 PathProgramCache]: Analyzing trace with hash 212767863, now seen corresponding path program 1 times [2022-10-17 11:01:17,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:17,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683372602] [2022-10-17 11:01:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:17,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:01:17,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:17,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683372602] [2022-10-17 11:01:17,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683372602] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:17,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:17,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:01:17,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499295901] [2022-10-17 11:01:17,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:17,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:01:17,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:17,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:01:17,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:17,823 INFO L87 Difference]: Start difference. First operand 1714 states and 2516 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:18,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:18,896 INFO L93 Difference]: Finished difference Result 4665 states and 6865 transitions. [2022-10-17 11:01:18,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:01:18,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2022-10-17 11:01:18,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:18,918 INFO L225 Difference]: With dead ends: 4665 [2022-10-17 11:01:18,918 INFO L226 Difference]: Without dead ends: 2953 [2022-10-17 11:01:18,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:18,934 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 241 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:18,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 167 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 11:01:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2022-10-17 11:01:19,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2949. [2022-10-17 11:01:19,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2948 states have (on average 1.4189280868385346) internal successors, (4183), 2948 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4183 transitions. [2022-10-17 11:01:19,035 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4183 transitions. Word has length 180 [2022-10-17 11:01:19,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:19,035 INFO L495 AbstractCegarLoop]: Abstraction has 2949 states and 4183 transitions. [2022-10-17 11:01:19,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4183 transitions. [2022-10-17 11:01:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-10-17 11:01:19,045 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:19,046 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:19,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 11:01:19,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:19,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:19,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1433692648, now seen corresponding path program 1 times [2022-10-17 11:01:19,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:19,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297143709] [2022-10-17 11:01:19,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:19,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 11:01:19,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:19,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297143709] [2022-10-17 11:01:19,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297143709] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:19,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:19,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:01:19,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742200091] [2022-10-17 11:01:19,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:19,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:01:19,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:19,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:01:19,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:19,325 INFO L87 Difference]: Start difference. First operand 2949 states and 4183 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:20,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:20,430 INFO L93 Difference]: Finished difference Result 8575 states and 12210 transitions. [2022-10-17 11:01:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:01:20,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 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 181 [2022-10-17 11:01:20,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:20,465 INFO L225 Difference]: With dead ends: 8575 [2022-10-17 11:01:20,465 INFO L226 Difference]: Without dead ends: 5831 [2022-10-17 11:01:20,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:20,474 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:20,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 11:01:20,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2022-10-17 11:01:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 5795. [2022-10-17 11:01:20,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 5794 states have (on average 1.387124611667242) internal successors, (8037), 5794 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:20,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 8037 transitions. [2022-10-17 11:01:20,661 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 8037 transitions. Word has length 181 [2022-10-17 11:01:20,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:20,662 INFO L495 AbstractCegarLoop]: Abstraction has 5795 states and 8037 transitions. [2022-10-17 11:01:20,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:20,662 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 8037 transitions. [2022-10-17 11:01:20,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-10-17 11:01:20,675 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:20,675 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:20,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 11:01:20,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:20,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:20,676 INFO L85 PathProgramCache]: Analyzing trace with hash -509944834, now seen corresponding path program 1 times [2022-10-17 11:01:20,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:20,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632645924] [2022-10-17 11:01:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:20,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 11:01:21,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:21,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632645924] [2022-10-17 11:01:21,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632645924] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:21,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:21,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:01:21,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551745597] [2022-10-17 11:01:21,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:21,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:01:21,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:21,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:01:21,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:21,165 INFO L87 Difference]: Start difference. First operand 5795 states and 8037 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:22,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:22,403 INFO L93 Difference]: Finished difference Result 17290 states and 23986 transitions. [2022-10-17 11:01:22,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:01:22,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 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 195 [2022-10-17 11:01:22,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:22,470 INFO L225 Difference]: With dead ends: 17290 [2022-10-17 11:01:22,470 INFO L226 Difference]: Without dead ends: 11497 [2022-10-17 11:01:22,479 INFO L412 NwaCegarLoop]: 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 [2022-10-17 11:01:22,481 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:22,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 415 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 11:01:22,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11497 states. [2022-10-17 11:01:22,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11497 to 11490. [2022-10-17 11:01:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11490 states, 11489 states have (on average 1.2984593959439463) internal successors, (14918), 11489 states have internal predecessors, (14918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11490 states to 11490 states and 14918 transitions. [2022-10-17 11:01:22,851 INFO L78 Accepts]: Start accepts. Automaton has 11490 states and 14918 transitions. Word has length 195 [2022-10-17 11:01:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:22,852 INFO L495 AbstractCegarLoop]: Abstraction has 11490 states and 14918 transitions. [2022-10-17 11:01:22,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:22,852 INFO L276 IsEmpty]: Start isEmpty. Operand 11490 states and 14918 transitions. [2022-10-17 11:01:22,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-10-17 11:01:22,878 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:22,879 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:22,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 11:01:22,879 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:22,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:22,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1313048590, now seen corresponding path program 1 times [2022-10-17 11:01:22,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:22,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643861183] [2022-10-17 11:01:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:22,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 11:01:23,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:23,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643861183] [2022-10-17 11:01:23,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643861183] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:23,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:23,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:01:23,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193413776] [2022-10-17 11:01:23,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:23,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:01:23,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:23,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:01:23,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:23,516 INFO L87 Difference]: Start difference. First operand 11490 states and 14918 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:24,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:24,795 INFO L93 Difference]: Finished difference Result 30541 states and 39608 transitions. [2022-10-17 11:01:24,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:01:24,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 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 202 [2022-10-17 11:01:24,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:24,867 INFO L225 Difference]: With dead ends: 30541 [2022-10-17 11:01:24,868 INFO L226 Difference]: Without dead ends: 19865 [2022-10-17 11:01:24,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:24,885 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 217 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:24,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 161 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 11:01:24,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19865 states. [2022-10-17 11:01:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19865 to 19849. [2022-10-17 11:01:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19849 states, 19848 states have (on average 1.2673821039903266) internal successors, (25155), 19848 states have internal predecessors, (25155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19849 states to 19849 states and 25155 transitions. [2022-10-17 11:01:25,450 INFO L78 Accepts]: Start accepts. Automaton has 19849 states and 25155 transitions. Word has length 202 [2022-10-17 11:01:25,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:25,451 INFO L495 AbstractCegarLoop]: Abstraction has 19849 states and 25155 transitions. [2022-10-17 11:01:25,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:25,452 INFO L276 IsEmpty]: Start isEmpty. Operand 19849 states and 25155 transitions. [2022-10-17 11:01:25,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-10-17 11:01:25,568 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:25,568 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:25,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 11:01:25,569 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:25,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:25,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1206143638, now seen corresponding path program 1 times [2022-10-17 11:01:25,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:25,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693300654] [2022-10-17 11:01:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:25,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-10-17 11:01:26,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:26,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693300654] [2022-10-17 11:01:26,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693300654] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:26,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:26,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:01:26,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59393005] [2022-10-17 11:01:26,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:26,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:01:26,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:26,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:01:26,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:26,120 INFO L87 Difference]: Start difference. First operand 19849 states and 25155 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:27,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:27,332 INFO L93 Difference]: Finished difference Result 45211 states and 57500 transitions. [2022-10-17 11:01:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:01:27,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 221 [2022-10-17 11:01:27,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:27,387 INFO L225 Difference]: With dead ends: 45211 [2022-10-17 11:01:27,387 INFO L226 Difference]: Without dead ends: 25364 [2022-10-17 11:01:27,409 INFO L412 NwaCegarLoop]: 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 [2022-10-17 11:01:27,410 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 210 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:27,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 408 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 11:01:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25364 states. [2022-10-17 11:01:27,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25364 to 24516. [2022-10-17 11:01:27,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24516 states, 24515 states have (on average 1.2366306343055273) internal successors, (30316), 24515 states have internal predecessors, (30316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:28,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24516 states to 24516 states and 30316 transitions. [2022-10-17 11:01:28,006 INFO L78 Accepts]: Start accepts. Automaton has 24516 states and 30316 transitions. Word has length 221 [2022-10-17 11:01:28,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:28,008 INFO L495 AbstractCegarLoop]: Abstraction has 24516 states and 30316 transitions. [2022-10-17 11:01:28,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 24516 states and 30316 transitions. [2022-10-17 11:01:28,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-10-17 11:01:28,056 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:28,057 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:28,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 11:01:28,057 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:28,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:28,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1545620703, now seen corresponding path program 1 times [2022-10-17 11:01:28,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:28,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800419210] [2022-10-17 11:01:28,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:28,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-10-17 11:01:28,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:28,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800419210] [2022-10-17 11:01:28,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800419210] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:28,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:01:28,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 11:01:28,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593191019] [2022-10-17 11:01:28,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:28,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:01:28,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:28,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:01:28,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:28,926 INFO L87 Difference]: Start difference. First operand 24516 states and 30316 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:30,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:01:30,163 INFO L93 Difference]: Finished difference Result 53726 states and 66206 transitions. [2022-10-17 11:01:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:01:30,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 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 227 [2022-10-17 11:01:30,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:01:30,242 INFO L225 Difference]: With dead ends: 53726 [2022-10-17 11:01:30,242 INFO L226 Difference]: Without dead ends: 30227 [2022-10-17 11:01:30,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:01:30,276 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 204 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:01:30,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 184 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 11:01:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30227 states. [2022-10-17 11:01:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30227 to 30200. [2022-10-17 11:01:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30200 states, 30199 states have (on average 1.2158018477433028) internal successors, (36716), 30199 states have internal predecessors, (36716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30200 states to 30200 states and 36716 transitions. [2022-10-17 11:01:31,070 INFO L78 Accepts]: Start accepts. Automaton has 30200 states and 36716 transitions. Word has length 227 [2022-10-17 11:01:31,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:01:31,071 INFO L495 AbstractCegarLoop]: Abstraction has 30200 states and 36716 transitions. [2022-10-17 11:01:31,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:01:31,071 INFO L276 IsEmpty]: Start isEmpty. Operand 30200 states and 36716 transitions. [2022-10-17 11:01:31,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-10-17 11:01:31,128 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:01:31,128 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:01:31,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 11:01:31,129 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:01:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:01:31,130 INFO L85 PathProgramCache]: Analyzing trace with hash -176441772, now seen corresponding path program 2 times [2022-10-17 11:01:31,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:01:31,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659629199] [2022-10-17 11:01:31,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:01:31,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:01:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:01:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-10-17 11:01:32,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:01:32,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659629199] [2022-10-17 11:01:32,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659629199] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:01:32,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055879274] [2022-10-17 11:01:32,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 11:01:32,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:01:32,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:01:32,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:01:32,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cbab4e0-4561-435f-8504-820807519065/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 11:01:32,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 11:01:32,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:01:32,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 11:01:32,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:01:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-10-17 11:01:32,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:01:32,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055879274] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:01:32,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:01:32,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-10-17 11:01:32,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779371286] [2022-10-17 11:01:32,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:01:32,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:01:32,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:01:32,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:01:32,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:01:32,353 INFO L87 Difference]: Start difference. First operand 30200 states and 36716 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)