./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6146570f-6881-4997-9136-c144a84bcf9b/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6146570f-6881-4997-9136-c144a84bcf9b/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6146570f-6881-4997-9136-c144a84bcf9b/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6146570f-6881-4997-9136-c144a84bcf9b/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6146570f-6881-4997-9136-c144a84bcf9b/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6146570f-6881-4997-9136-c144a84bcf9b/bin/uautomizer-ug76WZFUDN --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 39257b2f2790dc593eb015569e826a332fcc3e3cd918d00daa305f748c1b3d75 --- 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-6b4ec56 [2022-11-20 09:35:07,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:35:07,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:35:07,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:35:07,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:35:07,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:35:07,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:35:07,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:35:07,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:35:07,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:35:07,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:35:07,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:35:07,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:35:07,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:35:07,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:35:07,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:35:07,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:35:07,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:35:07,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:35:07,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:35:07,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:35:07,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:35:07,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:35:07,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:35:07,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:35:07,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:35:07,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:35:07,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:35:07,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:35:07,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:35:07,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:35:07,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:35:07,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:35:07,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:35:07,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:35:07,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:35:07,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:35:07,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:35:07,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:35:07,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:35:07,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:35:07,166 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6146570f-6881-4997-9136-c144a84bcf9b/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 09:35:07,215 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:35:07,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:35:07,217 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:35:07,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:35:07,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:35:07,219 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:35:07,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:35:07,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:35:07,221 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:35:07,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:35:07,223 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:35:07,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:35:07,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:35:07,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:35:07,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:35:07,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:35:07,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:35:07,225 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:35:07,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:35:07,226 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:35:07,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:35:07,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:35:07,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:35:07,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:35:07,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:35:07,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:35:07,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:35:07,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:35:07,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:35:07,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:35:07,230 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:35:07,230 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:35:07,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:35:07,231 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_6146570f-6881-4997-9136-c144a84bcf9b/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6146570f-6881-4997-9136-c144a84bcf9b/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39257b2f2790dc593eb015569e826a332fcc3e3cd918d00daa305f748c1b3d75 [2022-11-20 09:35:07,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:35:07,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:35:07,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:35:07,594 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:35:07,595 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:35:07,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6146570f-6881-4997-9136-c144a84bcf9b/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/eca-rers2018/Problem13.c [2022-11-20 09:35:11,243 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:35:13,477 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:35:13,478 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6146570f-6881-4997-9136-c144a84bcf9b/sv-benchmarks/c/eca-rers2018/Problem13.c [2022-11-20 09:35:13,703 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6146570f-6881-4997-9136-c144a84bcf9b/bin/uautomizer-ug76WZFUDN/data/3ca6da8f0/bb70120f9d974c5bb81b4194a8133389/FLAGf9f6d647e [2022-11-20 09:35:13,726 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6146570f-6881-4997-9136-c144a84bcf9b/bin/uautomizer-ug76WZFUDN/data/3ca6da8f0/bb70120f9d974c5bb81b4194a8133389 [2022-11-20 09:35:13,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:35:13,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:35:13,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:35:13,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:35:13,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:35:13,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:35:13" (1/1) ... [2022-11-20 09:35:13,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aab768c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:13, skipping insertion in model container [2022-11-20 09:35:13,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:35:13" (1/1) ... [2022-11-20 09:35:13,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:35:14,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:35:15,230 WARN L237 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_6146570f-6881-4997-9136-c144a84bcf9b/sv-benchmarks/c/eca-rers2018/Problem13.c[778,791] [2022-11-20 09:35:15,271 WARN L237 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_6146570f-6881-4997-9136-c144a84bcf9b/sv-benchmarks/c/eca-rers2018/Problem13.c[817,830] [2022-11-20 09:35:33,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:35:33,354 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:35:33,386 WARN L237 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_6146570f-6881-4997-9136-c144a84bcf9b/sv-benchmarks/c/eca-rers2018/Problem13.c[778,791] [2022-11-20 09:35:33,387 WARN L237 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_6146570f-6881-4997-9136-c144a84bcf9b/sv-benchmarks/c/eca-rers2018/Problem13.c[817,830] [2022-11-20 09:35:36,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:35:38,091 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:35:38,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:38 WrapperNode [2022-11-20 09:35:38,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:35:38,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:35:38,097 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:35:38,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:35:38,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:38" (1/1) ... [2022-11-20 09:35:38,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:38" (1/1) ... [2022-11-20 09:35:41,150 INFO L138 Inliner]: procedures = 710, calls = 701, calls flagged for inlining = 597, calls inlined = 597, statements flattened = 108769 [2022-11-20 09:35:41,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:35:41,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:35:41,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:35:41,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:35:41,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:38" (1/1) ... [2022-11-20 09:35:41,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:38" (1/1) ... [2022-11-20 09:35:41,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:38" (1/1) ... [2022-11-20 09:35:41,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:38" (1/1) ... [2022-11-20 09:35:42,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:38" (1/1) ... [2022-11-20 09:35:42,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:38" (1/1) ... [2022-11-20 09:35:43,108 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:38" (1/1) ... [2022-11-20 09:35:43,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:38" (1/1) ... [2022-11-20 09:35:43,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:35:43,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:35:43,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:35:43,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:35:43,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:38" (1/1) ... [2022-11-20 09:35:43,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:35:43,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6146570f-6881-4997-9136-c144a84bcf9b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:43,621 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6146570f-6881-4997-9136-c144a84bcf9b/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:35:43,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6146570f-6881-4997-9136-c144a84bcf9b/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:35:43,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:35:43,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:35:43,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:35:43,686 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2022-11-20 09:35:43,686 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2022-11-20 09:35:43,686 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2022-11-20 09:35:43,687 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2022-11-20 09:35:43,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:35:44,265 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:35:44,268 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:36:15,049 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:36:15,104 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:36:15,104 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 09:36:15,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:36:15 BoogieIcfgContainer [2022-11-20 09:36:15,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:36:15,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:36:15,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:36:15,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:36:15,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:35:13" (1/3) ... [2022-11-20 09:36:15,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae38b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:36:15, skipping insertion in model container [2022-11-20 09:36:15,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:35:38" (2/3) ... [2022-11-20 09:36:15,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae38b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:36:15, skipping insertion in model container [2022-11-20 09:36:15,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:36:15" (3/3) ... [2022-11-20 09:36:15,126 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13.c [2022-11-20 09:36:15,152 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:36:15,152 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 09:36:15,319 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:36:15,329 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;@350e015f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:36:15,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:36:15,352 INFO L276 IsEmpty]: Start isEmpty. Operand has 3533 states, 3428 states have (on average 1.8246791131855309) internal successors, (6255), 3430 states have internal predecessors, (6255), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-20 09:36:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:36:15,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:15,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:15,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:36:15,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:15,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1914797321, now seen corresponding path program 1 times [2022-11-20 09:36:15,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:15,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91816320] [2022-11-20 09:36:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:15,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:16,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:16,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91816320] [2022-11-20 09:36:16,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91816320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:36:16,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:36:16,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:36:16,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764425482] [2022-11-20 09:36:16,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:36:16,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:36:16,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:16,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:36:16,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:36:16,357 INFO L87 Difference]: Start difference. First operand has 3533 states, 3428 states have (on average 1.8246791131855309) internal successors, (6255), 3430 states have internal predecessors, (6255), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:33,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:33,776 INFO L93 Difference]: Finished difference Result 9556 states and 17573 transitions. [2022-11-20 09:36:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:36:33,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 09:36:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:33,851 INFO L225 Difference]: With dead ends: 9556 [2022-11-20 09:36:33,851 INFO L226 Difference]: Without dead ends: 6016 [2022-11-20 09:36:33,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:36:33,874 INFO L413 NwaCegarLoop]: 6282 mSDtfsCounter, 4904 mSDsluCounter, 3321 mSDsCounter, 0 mSdLazyCounter, 7368 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4904 SdHoareTripleChecker+Valid, 9603 SdHoareTripleChecker+Invalid, 7981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 7368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:33,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4904 Valid, 9603 Invalid, 7981 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [613 Valid, 7368 Invalid, 0 Unknown, 0 Unchecked, 16.7s Time] [2022-11-20 09:36:33,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6016 states. [2022-11-20 09:36:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6016 to 5245. [2022-11-20 09:36:34,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5245 states, 5143 states have (on average 1.7841726618705036) internal successors, (9176), 5242 states have internal predecessors, (9176), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5245 states to 5245 states and 9276 transitions. [2022-11-20 09:36:34,155 INFO L78 Accepts]: Start accepts. Automaton has 5245 states and 9276 transitions. Word has length 13 [2022-11-20 09:36:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:34,156 INFO L495 AbstractCegarLoop]: Abstraction has 5245 states and 9276 transitions. [2022-11-20 09:36:34,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 5245 states and 9276 transitions. [2022-11-20 09:36:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:36:34,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:34,161 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] [2022-11-20 09:36:34,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:36:34,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:36:34,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:34,163 INFO L85 PathProgramCache]: Analyzing trace with hash -873779178, now seen corresponding path program 1 times [2022-11-20 09:36:34,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:34,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267841761] [2022-11-20 09:36:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:34,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:34,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:34,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267841761] [2022-11-20 09:36:34,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267841761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:36:34,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:36:34,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:36:34,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930152180] [2022-11-20 09:36:34,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:36:34,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:36:34,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:34,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:36:34,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:36:34,639 INFO L87 Difference]: Start difference. First operand 5245 states and 9276 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:45,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:45,911 INFO L93 Difference]: Finished difference Result 11853 states and 20876 transitions. [2022-11-20 09:36:45,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:36:45,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 09:36:45,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:45,945 INFO L225 Difference]: With dead ends: 11853 [2022-11-20 09:36:45,945 INFO L226 Difference]: Without dead ends: 6610 [2022-11-20 09:36:45,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:36:45,953 INFO L413 NwaCegarLoop]: 6516 mSDtfsCounter, 1960 mSDsluCounter, 3296 mSDsCounter, 0 mSdLazyCounter, 4502 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1960 SdHoareTripleChecker+Valid, 9812 SdHoareTripleChecker+Invalid, 4757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 4502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:45,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1960 Valid, 9812 Invalid, 4757 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [255 Valid, 4502 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2022-11-20 09:36:45,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6610 states. [2022-11-20 09:36:46,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6610 to 6115. [2022-11-20 09:36:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6115 states, 6013 states have (on average 1.7490437385664395) internal successors, (10517), 6112 states have internal predecessors, (10517), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6115 states to 6115 states and 10617 transitions. [2022-11-20 09:36:46,128 INFO L78 Accepts]: Start accepts. Automaton has 6115 states and 10617 transitions. Word has length 22 [2022-11-20 09:36:46,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:46,129 INFO L495 AbstractCegarLoop]: Abstraction has 6115 states and 10617 transitions. [2022-11-20 09:36:46,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:46,130 INFO L276 IsEmpty]: Start isEmpty. Operand 6115 states and 10617 transitions. [2022-11-20 09:36:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 09:36:46,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:46,132 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] [2022-11-20 09:36:46,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 09:36:46,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:36:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:46,133 INFO L85 PathProgramCache]: Analyzing trace with hash -2028786272, now seen corresponding path program 1 times [2022-11-20 09:36:46,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:46,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820007889] [2022-11-20 09:36:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:46,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:46,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:46,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820007889] [2022-11-20 09:36:46,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820007889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:36:46,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:36:46,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:36:46,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611906634] [2022-11-20 09:36:46,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:36:46,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:36:46,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:46,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:36:46,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:36:46,278 INFO L87 Difference]: Start difference. First operand 6115 states and 10617 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:46,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:46,762 INFO L93 Difference]: Finished difference Result 17808 states and 30942 transitions. [2022-11-20 09:36:46,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:36:46,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-20 09:36:46,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:46,841 INFO L225 Difference]: With dead ends: 17808 [2022-11-20 09:36:46,841 INFO L226 Difference]: Without dead ends: 11695 [2022-11-20 09:36:46,856 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 [2022-11-20 09:36:46,863 INFO L413 NwaCegarLoop]: 6287 mSDtfsCounter, 6151 mSDsluCounter, 6031 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6151 SdHoareTripleChecker+Valid, 12318 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:46,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6151 Valid, 12318 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:36:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11695 states. [2022-11-20 09:36:47,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11695 to 11596. [2022-11-20 09:36:47,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11596 states, 11494 states have (on average 1.7502175047851052) internal successors, (20117), 11593 states have internal predecessors, (20117), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11596 states to 11596 states and 20217 transitions. [2022-11-20 09:36:47,191 INFO L78 Accepts]: Start accepts. Automaton has 11596 states and 20217 transitions. Word has length 32 [2022-11-20 09:36:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:47,192 INFO L495 AbstractCegarLoop]: Abstraction has 11596 states and 20217 transitions. [2022-11-20 09:36:47,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 11596 states and 20217 transitions. [2022-11-20 09:36:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 09:36:47,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:47,195 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] [2022-11-20 09:36:47,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 09:36:47,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:36:47,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:47,200 INFO L85 PathProgramCache]: Analyzing trace with hash 342220768, now seen corresponding path program 1 times [2022-11-20 09:36:47,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:47,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511472150] [2022-11-20 09:36:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:47,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:47,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:47,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511472150] [2022-11-20 09:36:47,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511472150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:36:47,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:36:47,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:36:47,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671071690] [2022-11-20 09:36:47,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:36:47,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:36:47,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:47,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:36:47,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:36:47,579 INFO L87 Difference]: Start difference. First operand 11596 states and 20217 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:48,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:48,974 INFO L93 Difference]: Finished difference Result 34103 states and 59476 transitions. [2022-11-20 09:36:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:36:48,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-20 09:36:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:49,048 INFO L225 Difference]: With dead ends: 34103 [2022-11-20 09:36:49,048 INFO L226 Difference]: Without dead ends: 22509 [2022-11-20 09:36:49,070 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 [2022-11-20 09:36:49,081 INFO L413 NwaCegarLoop]: 6759 mSDtfsCounter, 5698 mSDsluCounter, 5872 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5698 SdHoareTripleChecker+Valid, 12631 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:49,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5698 Valid, 12631 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 09:36:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22509 states. [2022-11-20 09:36:49,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22509 to 22396. [2022-11-20 09:36:49,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22396 states, 22294 states have (on average 1.7489459047277294) internal successors, (38991), 22393 states have internal predecessors, (38991), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22396 states to 22396 states and 39091 transitions. [2022-11-20 09:36:49,611 INFO L78 Accepts]: Start accepts. Automaton has 22396 states and 39091 transitions. Word has length 32 [2022-11-20 09:36:49,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:49,614 INFO L495 AbstractCegarLoop]: Abstraction has 22396 states and 39091 transitions. [2022-11-20 09:36:49,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 22396 states and 39091 transitions. [2022-11-20 09:36:49,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 09:36:49,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:49,619 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] [2022-11-20 09:36:49,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 09:36:49,620 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:36:49,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:49,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2018208297, now seen corresponding path program 1 times [2022-11-20 09:36:49,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:49,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074173019] [2022-11-20 09:36:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:49,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:49,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:49,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074173019] [2022-11-20 09:36:49,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074173019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:36:49,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:36:49,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:36:49,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582915235] [2022-11-20 09:36:49,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:36:49,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:36:49,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:49,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:36:49,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:36:49,823 INFO L87 Difference]: Start difference. First operand 22396 states and 39091 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:50,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:50,458 INFO L93 Difference]: Finished difference Result 66961 states and 116860 transitions. [2022-11-20 09:36:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:36:50,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-20 09:36:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:50,596 INFO L225 Difference]: With dead ends: 66961 [2022-11-20 09:36:50,596 INFO L226 Difference]: Without dead ends: 44567 [2022-11-20 09:36:50,632 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 [2022-11-20 09:36:50,633 INFO L413 NwaCegarLoop]: 6276 mSDtfsCounter, 6144 mSDsluCounter, 6212 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6144 SdHoareTripleChecker+Valid, 12488 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:50,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6144 Valid, 12488 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:36:50,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44567 states. [2022-11-20 09:36:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44567 to 44464. [2022-11-20 09:36:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44464 states, 44362 states have (on average 1.747937423921374) internal successors, (77542), 44461 states have internal predecessors, (77542), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:51,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44464 states to 44464 states and 77642 transitions. [2022-11-20 09:36:51,710 INFO L78 Accepts]: Start accepts. Automaton has 44464 states and 77642 transitions. Word has length 33 [2022-11-20 09:36:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:51,711 INFO L495 AbstractCegarLoop]: Abstraction has 44464 states and 77642 transitions. [2022-11-20 09:36:51,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:51,713 INFO L276 IsEmpty]: Start isEmpty. Operand 44464 states and 77642 transitions. [2022-11-20 09:36:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 09:36:51,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:51,727 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] [2022-11-20 09:36:51,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 09:36:51,728 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:36:51,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:51,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1860746363, now seen corresponding path program 1 times [2022-11-20 09:36:51,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:51,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49799606] [2022-11-20 09:36:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:51,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:51,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:51,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49799606] [2022-11-20 09:36:51,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49799606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:36:51,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:36:51,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:36:51,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401162497] [2022-11-20 09:36:51,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:36:51,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:36:51,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:51,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:36:51,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:36:51,935 INFO L87 Difference]: Start difference. First operand 44464 states and 77642 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:00,326 INFO L93 Difference]: Finished difference Result 117524 states and 207236 transitions. [2022-11-20 09:37:00,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:37:00,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 09:37:00,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:00,548 INFO L225 Difference]: With dead ends: 117524 [2022-11-20 09:37:00,548 INFO L226 Difference]: Without dead ends: 73062 [2022-11-20 09:37:00,596 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 [2022-11-20 09:37:00,598 INFO L413 NwaCegarLoop]: 7496 mSDtfsCounter, 4604 mSDsluCounter, 4345 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 2122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4604 SdHoareTripleChecker+Valid, 11841 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2122 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:00,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4604 Valid, 11841 Invalid, 2924 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2122 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-11-20 09:37:00,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73062 states. [2022-11-20 09:37:01,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73062 to 71260. [2022-11-20 09:37:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71260 states, 71158 states have (on average 1.7639337811630456) internal successors, (125518), 71257 states have internal predecessors, (125518), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71260 states to 71260 states and 125618 transitions. [2022-11-20 09:37:02,500 INFO L78 Accepts]: Start accepts. Automaton has 71260 states and 125618 transitions. Word has length 34 [2022-11-20 09:37:02,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:02,502 INFO L495 AbstractCegarLoop]: Abstraction has 71260 states and 125618 transitions. [2022-11-20 09:37:02,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:02,502 INFO L276 IsEmpty]: Start isEmpty. Operand 71260 states and 125618 transitions. [2022-11-20 09:37:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 09:37:02,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:02,505 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] [2022-11-20 09:37:02,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 09:37:02,505 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:37:02,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:02,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1849249746, now seen corresponding path program 1 times [2022-11-20 09:37:02,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:02,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460805774] [2022-11-20 09:37:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:02,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:02,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:02,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460805774] [2022-11-20 09:37:02,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460805774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:37:02,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:37:02,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:37:02,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733762890] [2022-11-20 09:37:02,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:37:02,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:37:02,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:02,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:37:02,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:37:02,709 INFO L87 Difference]: Start difference. First operand 71260 states and 125618 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:04,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:04,363 INFO L93 Difference]: Finished difference Result 211126 states and 372228 transitions. [2022-11-20 09:37:04,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:37:04,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-20 09:37:04,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:04,727 INFO L225 Difference]: With dead ends: 211126 [2022-11-20 09:37:04,728 INFO L226 Difference]: Without dead ends: 139868 [2022-11-20 09:37:04,802 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 [2022-11-20 09:37:04,803 INFO L413 NwaCegarLoop]: 6345 mSDtfsCounter, 6023 mSDsluCounter, 6083 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6023 SdHoareTripleChecker+Valid, 12428 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:04,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6023 Valid, 12428 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:37:04,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139868 states. [2022-11-20 09:37:07,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139868 to 139762. [2022-11-20 09:37:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139762 states, 139660 states have (on average 1.7631390519833883) internal successors, (246240), 139759 states have internal predecessors, (246240), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139762 states to 139762 states and 246340 transitions. [2022-11-20 09:37:07,981 INFO L78 Accepts]: Start accepts. Automaton has 139762 states and 246340 transitions. Word has length 35 [2022-11-20 09:37:07,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:07,981 INFO L495 AbstractCegarLoop]: Abstraction has 139762 states and 246340 transitions. [2022-11-20 09:37:07,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 139762 states and 246340 transitions. [2022-11-20 09:37:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 09:37:07,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:07,985 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] [2022-11-20 09:37:07,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 09:37:07,985 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:37:07,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:07,986 INFO L85 PathProgramCache]: Analyzing trace with hash 900277528, now seen corresponding path program 1 times [2022-11-20 09:37:07,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:07,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492675119] [2022-11-20 09:37:07,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:07,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:08,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:08,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492675119] [2022-11-20 09:37:08,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492675119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:37:08,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:37:08,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:37:08,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737956120] [2022-11-20 09:37:08,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:37:08,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:37:08,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:08,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:37:08,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:37:08,300 INFO L87 Difference]: Start difference. First operand 139762 states and 246340 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:26,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:26,052 INFO L93 Difference]: Finished difference Result 320985 states and 565547 transitions. [2022-11-20 09:37:26,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:37:26,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-20 09:37:26,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:26,667 INFO L225 Difference]: With dead ends: 320985 [2022-11-20 09:37:26,668 INFO L226 Difference]: Without dead ends: 181225 [2022-11-20 09:37:26,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:37:26,750 INFO L413 NwaCegarLoop]: 7251 mSDtfsCounter, 4600 mSDsluCounter, 3663 mSDsCounter, 0 mSdLazyCounter, 6645 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4600 SdHoareTripleChecker+Valid, 10914 SdHoareTripleChecker+Invalid, 7064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 6645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:26,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4600 Valid, 10914 Invalid, 7064 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [419 Valid, 6645 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time] [2022-11-20 09:37:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181225 states. [2022-11-20 09:37:29,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181225 to 169162. [2022-11-20 09:37:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169162 states, 169060 states have (on average 1.747143026144564) internal successors, (295372), 169159 states have internal predecessors, (295372), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169162 states to 169162 states and 295472 transitions. [2022-11-20 09:37:30,379 INFO L78 Accepts]: Start accepts. Automaton has 169162 states and 295472 transitions. Word has length 36 [2022-11-20 09:37:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:30,379 INFO L495 AbstractCegarLoop]: Abstraction has 169162 states and 295472 transitions. [2022-11-20 09:37:30,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:30,380 INFO L276 IsEmpty]: Start isEmpty. Operand 169162 states and 295472 transitions. [2022-11-20 09:37:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 09:37:30,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:30,400 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] [2022-11-20 09:37:30,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 09:37:30,400 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:37:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash 965683763, now seen corresponding path program 1 times [2022-11-20 09:37:30,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:30,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637650272] [2022-11-20 09:37:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:30,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:30,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:30,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637650272] [2022-11-20 09:37:30,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637650272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:37:30,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:37:30,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:37:30,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987917374] [2022-11-20 09:37:30,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:37:30,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:37:30,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:37:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:37:30,650 INFO L87 Difference]: Start difference. First operand 169162 states and 295472 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:39,848 INFO L93 Difference]: Finished difference Result 400496 states and 702364 transitions. [2022-11-20 09:37:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:37:39,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-20 09:37:39,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:40,339 INFO L225 Difference]: With dead ends: 400496 [2022-11-20 09:37:40,339 INFO L226 Difference]: Without dead ends: 231336 [2022-11-20 09:37:40,430 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 [2022-11-20 09:37:40,431 INFO L413 NwaCegarLoop]: 9874 mSDtfsCounter, 4490 mSDsluCounter, 4418 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4490 SdHoareTripleChecker+Valid, 14292 SdHoareTripleChecker+Invalid, 2751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:40,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4490 Valid, 14292 Invalid, 2751 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [894 Valid, 1857 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-11-20 09:37:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231336 states. [2022-11-20 09:37:43,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231336 to 222318. [2022-11-20 09:37:44,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222318 states, 222216 states have (on average 1.7468364114195198) internal successors, (388175), 222315 states have internal predecessors, (388175), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222318 states to 222318 states and 388275 transitions. [2022-11-20 09:37:45,675 INFO L78 Accepts]: Start accepts. Automaton has 222318 states and 388275 transitions. Word has length 37 [2022-11-20 09:37:45,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:45,675 INFO L495 AbstractCegarLoop]: Abstraction has 222318 states and 388275 transitions. [2022-11-20 09:37:45,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:45,676 INFO L276 IsEmpty]: Start isEmpty. Operand 222318 states and 388275 transitions. [2022-11-20 09:37:45,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 09:37:45,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:45,678 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] [2022-11-20 09:37:45,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 09:37:45,678 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:37:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:45,679 INFO L85 PathProgramCache]: Analyzing trace with hash -620431340, now seen corresponding path program 1 times [2022-11-20 09:37:45,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:45,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810666199] [2022-11-20 09:37:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:45,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:46,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:46,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810666199] [2022-11-20 09:37:46,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810666199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:37:46,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:37:46,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:37:46,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823975340] [2022-11-20 09:37:46,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:37:46,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:37:46,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:46,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:37:46,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:37:46,064 INFO L87 Difference]: Start difference. First operand 222318 states and 388275 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:03,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:38:03,937 INFO L93 Difference]: Finished difference Result 591713 states and 1027305 transitions. [2022-11-20 09:38:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:38:03,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-20 09:38:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:38:04,708 INFO L225 Difference]: With dead ends: 591713 [2022-11-20 09:38:04,709 INFO L226 Difference]: Without dead ends: 369397 [2022-11-20 09:38:04,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:38:04,832 INFO L413 NwaCegarLoop]: 7308 mSDtfsCounter, 4486 mSDsluCounter, 3778 mSDsCounter, 0 mSdLazyCounter, 6381 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4486 SdHoareTripleChecker+Valid, 11086 SdHoareTripleChecker+Invalid, 6716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 6381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:38:04,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4486 Valid, 11086 Invalid, 6716 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [335 Valid, 6381 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time] [2022-11-20 09:38:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369397 states.