./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.04.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc --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 05d3b7d21cc48825b4a0189c75f03d768acc6241312029d3e223c1b9b2a509ea --- 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-5e519f3 [2022-11-02 20:28:30,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:28:30,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:28:30,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:28:30,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:28:30,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:28:30,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:28:30,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:28:30,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:28:30,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:28:30,101 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:28:30,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:28:30,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:28:30,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:28:30,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:28:30,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:28:30,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:28:30,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:28:30,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:28:30,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:28:30,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:28:30,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:28:30,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:28:30,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:28:30,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:28:30,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:28:30,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:28:30,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:28:30,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:28:30,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:28:30,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:28:30,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:28:30,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:28:30,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:28:30,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:28:30,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:28:30,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:28:30,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:28:30,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:28:30,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:28:30,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:28:30,149 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:28:30,187 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:28:30,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:28:30,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:28:30,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:28:30,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:28:30,190 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:28:30,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:28:30,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:28:30,191 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:28:30,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:28:30,192 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:28:30,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:28:30,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:28:30,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:28:30,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:28:30,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:28:30,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:28:30,194 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:28:30,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:28:30,195 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:28:30,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:28:30,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:28:30,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:28:30,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:28:30,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:28:30,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:28:30,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:28:30,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:28:30,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:28:30,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:28:30,200 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:28:30,200 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:28:30,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:28:30,201 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_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d3b7d21cc48825b4a0189c75f03d768acc6241312029d3e223c1b9b2a509ea [2022-11-02 20:28:30,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:28:30,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:28:30,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:28:30,528 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:28:30,529 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:28:30,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2022-11-02 20:28:30,600 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/data/b016de3f2/d22987821a174166a0f09d3e536deb7d/FLAGba9386f6f [2022-11-02 20:28:31,041 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:28:31,042 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2022-11-02 20:28:31,059 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/data/b016de3f2/d22987821a174166a0f09d3e536deb7d/FLAGba9386f6f [2022-11-02 20:28:31,414 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/data/b016de3f2/d22987821a174166a0f09d3e536deb7d [2022-11-02 20:28:31,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:28:31,417 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:28:31,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:28:31,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:28:31,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:28:31,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:28:31" (1/1) ... [2022-11-02 20:28:31,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f68798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:31, skipping insertion in model container [2022-11-02 20:28:31,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:28:31" (1/1) ... [2022-11-02 20:28:31,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:28:31,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:28:31,648 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/sv-benchmarks/c/systemc/token_ring.04.cil-2.c[671,684] [2022-11-02 20:28:31,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:28:31,729 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:28:31,740 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/sv-benchmarks/c/systemc/token_ring.04.cil-2.c[671,684] [2022-11-02 20:28:31,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:28:31,794 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:28:31,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:31 WrapperNode [2022-11-02 20:28:31,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:28:31,796 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:28:31,796 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:28:31,796 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:28:31,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:31" (1/1) ... [2022-11-02 20:28:31,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:31" (1/1) ... [2022-11-02 20:28:31,851 INFO L138 Inliner]: procedures = 36, calls = 44, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 394 [2022-11-02 20:28:31,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:28:31,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:28:31,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:28:31,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:28:31,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:31" (1/1) ... [2022-11-02 20:28:31,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:31" (1/1) ... [2022-11-02 20:28:31,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:31" (1/1) ... [2022-11-02 20:28:31,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:31" (1/1) ... [2022-11-02 20:28:31,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:31" (1/1) ... [2022-11-02 20:28:31,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:31" (1/1) ... [2022-11-02 20:28:31,880 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:31" (1/1) ... [2022-11-02 20:28:31,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:31" (1/1) ... [2022-11-02 20:28:31,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:28:31,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:28:31,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:28:31,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:28:31,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:31" (1/1) ... [2022-11-02 20:28:31,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:28:31,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:31,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:28:31,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:28:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:28:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-02 20:28:31,966 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-02 20:28:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-02 20:28:31,967 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-02 20:28:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-02 20:28:31,967 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-02 20:28:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-02 20:28:31,967 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-02 20:28:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-02 20:28:31,968 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-02 20:28:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-02 20:28:31,968 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-02 20:28:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:28:31,968 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-02 20:28:31,969 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-02 20:28:31,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:28:31,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:28:32,054 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:28:32,056 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:28:32,581 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:28:32,590 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:28:32,591 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-02 20:28:32,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:28:32 BoogieIcfgContainer [2022-11-02 20:28:32,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:28:32,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:28:32,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:28:32,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:28:32,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:28:31" (1/3) ... [2022-11-02 20:28:32,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b260817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:28:32, skipping insertion in model container [2022-11-02 20:28:32,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:31" (2/3) ... [2022-11-02 20:28:32,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b260817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:28:32, skipping insertion in model container [2022-11-02 20:28:32,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:28:32" (3/3) ... [2022-11-02 20:28:32,611 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-2.c [2022-11-02 20:28:32,629 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:28:32,629 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:28:32,729 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:28:32,741 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;@74b9378b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:28:32,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:28:32,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 161 states have (on average 1.6211180124223603) internal successors, (261), 165 states have internal predecessors, (261), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-02 20:28:32,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-02 20:28:32,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:32,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:32,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:32,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:32,789 INFO L85 PathProgramCache]: Analyzing trace with hash -256970182, now seen corresponding path program 1 times [2022-11-02 20:28:32,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:32,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983369051] [2022-11-02 20:28:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:32,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:33,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:28:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:33,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:28:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:33,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:28:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:33,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:28:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:33,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:28:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:33,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:33,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983369051] [2022-11-02 20:28:33,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983369051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:33,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:33,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:28:33,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087763030] [2022-11-02 20:28:33,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:33,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:28:33,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:33,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:28:33,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:28:33,335 INFO L87 Difference]: Start difference. First operand has 190 states, 161 states have (on average 1.6211180124223603) internal successors, (261), 165 states have internal predecessors, (261), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:34,262 INFO L93 Difference]: Finished difference Result 422 states and 678 transitions. [2022-11-02 20:28:34,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:28:34,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-11-02 20:28:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:34,278 INFO L225 Difference]: With dead ends: 422 [2022-11-02 20:28:34,278 INFO L226 Difference]: Without dead ends: 238 [2022-11-02 20:28:34,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:28:34,284 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 444 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:34,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 511 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:28:34,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-02 20:28:34,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 184. [2022-11-02 20:28:34,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 157 states have (on average 1.5286624203821657) internal successors, (240), 159 states have internal predecessors, (240), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-02 20:28:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 278 transitions. [2022-11-02 20:28:34,353 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 278 transitions. Word has length 90 [2022-11-02 20:28:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:34,354 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 278 transitions. [2022-11-02 20:28:34,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 278 transitions. [2022-11-02 20:28:34,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-02 20:28:34,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:34,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:34,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:28:34,358 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:34,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:34,359 INFO L85 PathProgramCache]: Analyzing trace with hash -497209928, now seen corresponding path program 1 times [2022-11-02 20:28:34,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:34,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962546403] [2022-11-02 20:28:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:34,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:34,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:28:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:34,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:28:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:34,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:28:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:34,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:28:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:34,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:28:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:34,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:34,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962546403] [2022-11-02 20:28:34,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962546403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:34,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:34,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:28:34,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678170384] [2022-11-02 20:28:34,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:34,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:28:34,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:34,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:28:34,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:28:34,658 INFO L87 Difference]: Start difference. First operand 184 states and 278 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:36,000 INFO L93 Difference]: Finished difference Result 638 states and 989 transitions. [2022-11-02 20:28:36,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:28:36,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-11-02 20:28:36,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:36,014 INFO L225 Difference]: With dead ends: 638 [2022-11-02 20:28:36,014 INFO L226 Difference]: Without dead ends: 466 [2022-11-02 20:28:36,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:28:36,021 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 649 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:36,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 798 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:28:36,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-11-02 20:28:36,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 357. [2022-11-02 20:28:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 310 states have (on average 1.5419354838709678) internal successors, (478), 313 states have internal predecessors, (478), 33 states have call successors, (33), 13 states have call predecessors, (33), 13 states have return successors, (34), 31 states have call predecessors, (34), 31 states have call successors, (34) [2022-11-02 20:28:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 545 transitions. [2022-11-02 20:28:36,114 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 545 transitions. Word has length 90 [2022-11-02 20:28:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:36,116 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 545 transitions. [2022-11-02 20:28:36,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:36,117 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 545 transitions. [2022-11-02 20:28:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-02 20:28:36,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:36,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:36,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:28:36,128 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:36,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:36,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1743052724, now seen corresponding path program 1 times [2022-11-02 20:28:36,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:36,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945293399] [2022-11-02 20:28:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:36,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:36,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:28:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:36,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:28:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:36,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:28:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:36,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:28:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:36,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:28:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:36,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:36,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945293399] [2022-11-02 20:28:36,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945293399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:36,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:36,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:28:36,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530648100] [2022-11-02 20:28:36,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:36,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:28:36,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:28:36,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:28:36,380 INFO L87 Difference]: Start difference. First operand 357 states and 545 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:38,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:38,135 INFO L93 Difference]: Finished difference Result 1041 states and 1611 transitions. [2022-11-02 20:28:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:28:38,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-11-02 20:28:38,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:38,142 INFO L225 Difference]: With dead ends: 1041 [2022-11-02 20:28:38,142 INFO L226 Difference]: Without dead ends: 696 [2022-11-02 20:28:38,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:28:38,146 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 645 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:38,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 1386 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:28:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-11-02 20:28:38,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 519. [2022-11-02 20:28:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 452 states have (on average 1.5353982300884956) internal successors, (694), 456 states have internal predecessors, (694), 46 states have call successors, (46), 19 states have call predecessors, (46), 20 states have return successors, (49), 45 states have call predecessors, (49), 44 states have call successors, (49) [2022-11-02 20:28:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 789 transitions. [2022-11-02 20:28:38,249 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 789 transitions. Word has length 90 [2022-11-02 20:28:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:38,251 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 789 transitions. [2022-11-02 20:28:38,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 789 transitions. [2022-11-02 20:28:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-02 20:28:38,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:38,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:38,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:28:38,256 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:38,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:38,257 INFO L85 PathProgramCache]: Analyzing trace with hash -817810122, now seen corresponding path program 1 times [2022-11-02 20:28:38,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:38,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135975063] [2022-11-02 20:28:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:38,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:28:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:28:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:28:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:28:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:28:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:38,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:38,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135975063] [2022-11-02 20:28:38,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135975063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:38,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:38,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:28:38,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816097700] [2022-11-02 20:28:38,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:38,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:28:38,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:38,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:28:38,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:28:38,548 INFO L87 Difference]: Start difference. First operand 519 states and 789 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:40,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:40,162 INFO L93 Difference]: Finished difference Result 1634 states and 2523 transitions. [2022-11-02 20:28:40,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:28:40,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-11-02 20:28:40,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:40,173 INFO L225 Difference]: With dead ends: 1634 [2022-11-02 20:28:40,173 INFO L226 Difference]: Without dead ends: 1127 [2022-11-02 20:28:40,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:28:40,187 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 692 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:40,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 957 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:28:40,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-11-02 20:28:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 844. [2022-11-02 20:28:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 737 states have (on average 1.5291723202170964) internal successors, (1127), 743 states have internal predecessors, (1127), 72 states have call successors, (72), 31 states have call predecessors, (72), 34 states have return successors, (83), 73 states have call predecessors, (83), 70 states have call successors, (83) [2022-11-02 20:28:40,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1282 transitions. [2022-11-02 20:28:40,309 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1282 transitions. Word has length 90 [2022-11-02 20:28:40,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:40,310 INFO L495 AbstractCegarLoop]: Abstraction has 844 states and 1282 transitions. [2022-11-02 20:28:40,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1282 transitions. [2022-11-02 20:28:40,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-02 20:28:40,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:40,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:40,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:28:40,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:40,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:40,324 INFO L85 PathProgramCache]: Analyzing trace with hash 69412724, now seen corresponding path program 1 times [2022-11-02 20:28:40,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:40,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288895092] [2022-11-02 20:28:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:40,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:40,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:28:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:40,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:28:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:40,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:28:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:40,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:28:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:40,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:28:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:40,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:40,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288895092] [2022-11-02 20:28:40,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288895092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:40,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:40,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:28:40,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427903860] [2022-11-02 20:28:40,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:40,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:28:40,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:40,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:28:40,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:28:40,534 INFO L87 Difference]: Start difference. First operand 844 states and 1282 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:42,244 INFO L93 Difference]: Finished difference Result 2779 states and 4280 transitions. [2022-11-02 20:28:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:28:42,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-11-02 20:28:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:42,255 INFO L225 Difference]: With dead ends: 2779 [2022-11-02 20:28:42,255 INFO L226 Difference]: Without dead ends: 1947 [2022-11-02 20:28:42,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:28:42,261 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 637 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:42,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 1376 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:28:42,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-11-02 20:28:42,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1495. [2022-11-02 20:28:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1308 states have (on average 1.5237003058103975) internal successors, (1993), 1318 states have internal predecessors, (1993), 124 states have call successors, (124), 55 states have call predecessors, (124), 62 states have return successors, (157), 129 states have call predecessors, (157), 122 states have call successors, (157) [2022-11-02 20:28:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 2274 transitions. [2022-11-02 20:28:42,438 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 2274 transitions. Word has length 90 [2022-11-02 20:28:42,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:42,438 INFO L495 AbstractCegarLoop]: Abstraction has 1495 states and 2274 transitions. [2022-11-02 20:28:42,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 2274 transitions. [2022-11-02 20:28:42,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-02 20:28:42,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:42,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:42,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:28:42,441 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:42,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1841629834, now seen corresponding path program 1 times [2022-11-02 20:28:42,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:42,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007586932] [2022-11-02 20:28:42,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:42,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:42,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:28:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:42,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:28:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:42,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:28:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:42,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:28:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:42,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:28:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:42,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:42,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007586932] [2022-11-02 20:28:42,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007586932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:42,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:42,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:28:42,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677473463] [2022-11-02 20:28:42,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:42,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:28:42,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:42,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:28:42,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:28:42,612 INFO L87 Difference]: Start difference. First operand 1495 states and 2274 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:44,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:44,338 INFO L93 Difference]: Finished difference Result 5068 states and 7810 transitions. [2022-11-02 20:28:44,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:28:44,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-11-02 20:28:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:44,358 INFO L225 Difference]: With dead ends: 5068 [2022-11-02 20:28:44,358 INFO L226 Difference]: Without dead ends: 3585 [2022-11-02 20:28:44,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:28:44,364 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 633 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:44,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 1372 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:28:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2022-11-02 20:28:44,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 2802. [2022-11-02 20:28:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2455 states have (on average 1.519755600814664) internal successors, (3731), 2473 states have internal predecessors, (3731), 228 states have call successors, (228), 103 states have call predecessors, (228), 118 states have return successors, (323), 241 states have call predecessors, (323), 226 states have call successors, (323) [2022-11-02 20:28:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 4282 transitions. [2022-11-02 20:28:44,642 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 4282 transitions. Word has length 90 [2022-11-02 20:28:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:44,642 INFO L495 AbstractCegarLoop]: Abstraction has 2802 states and 4282 transitions. [2022-11-02 20:28:44,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 4282 transitions. [2022-11-02 20:28:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-02 20:28:44,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:44,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:44,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:28:44,646 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:44,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:44,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1764729036, now seen corresponding path program 1 times [2022-11-02 20:28:44,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:44,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873268030] [2022-11-02 20:28:44,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:44,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:44,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:28:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:44,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:28:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:44,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:28:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:44,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:28:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:44,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:28:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:44,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:44,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873268030] [2022-11-02 20:28:44,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873268030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:44,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:44,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:28:44,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512189762] [2022-11-02 20:28:44,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:44,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:28:44,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:44,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:28:44,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:28:44,793 INFO L87 Difference]: Start difference. First operand 2802 states and 4282 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:47,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:47,118 INFO L93 Difference]: Finished difference Result 10685 states and 16466 transitions. [2022-11-02 20:28:47,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:28:47,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-11-02 20:28:47,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:47,160 INFO L225 Difference]: With dead ends: 10685 [2022-11-02 20:28:47,160 INFO L226 Difference]: Without dead ends: 7895 [2022-11-02 20:28:47,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:28:47,189 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 803 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:47,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [819 Valid, 1358 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:28:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7895 states. [2022-11-02 20:28:47,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7895 to 5381. [2022-11-02 20:28:47,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5381 states, 4730 states have (on average 1.5207188160676532) internal successors, (7193), 4764 states have internal predecessors, (7193), 420 states have call successors, (420), 199 states have call predecessors, (420), 230 states have return successors, (693), 449 states have call predecessors, (693), 418 states have call successors, (693) [2022-11-02 20:28:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5381 states to 5381 states and 8306 transitions. [2022-11-02 20:28:47,732 INFO L78 Accepts]: Start accepts. Automaton has 5381 states and 8306 transitions. Word has length 90 [2022-11-02 20:28:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:47,732 INFO L495 AbstractCegarLoop]: Abstraction has 5381 states and 8306 transitions. [2022-11-02 20:28:47,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 5381 states and 8306 transitions. [2022-11-02 20:28:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-02 20:28:47,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:47,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:47,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:28:47,739 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:47,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:47,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1562887606, now seen corresponding path program 1 times [2022-11-02 20:28:47,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:47,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590199188] [2022-11-02 20:28:47,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:47,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:47,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:28:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:47,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:28:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:47,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:28:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:47,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:28:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:47,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:28:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:47,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:47,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590199188] [2022-11-02 20:28:47,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590199188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:47,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:47,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:28:47,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199762294] [2022-11-02 20:28:47,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:47,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:28:47,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:47,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:28:47,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:28:47,973 INFO L87 Difference]: Start difference. First operand 5381 states and 8306 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:51,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:51,188 INFO L93 Difference]: Finished difference Result 20350 states and 31628 transitions. [2022-11-02 20:28:51,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:28:51,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-11-02 20:28:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:51,264 INFO L225 Difference]: With dead ends: 20350 [2022-11-02 20:28:51,264 INFO L226 Difference]: Without dead ends: 14981 [2022-11-02 20:28:51,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:28:51,286 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 660 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:51,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1408 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-02 20:28:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14981 states. [2022-11-02 20:28:52,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14981 to 10200. [2022-11-02 20:28:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10200 states, 8957 states have (on average 1.5128949425030702) internal successors, (13551), 9023 states have internal predecessors, (13551), 788 states have call successors, (788), 391 states have call predecessors, (788), 454 states have return successors, (1579), 849 states have call predecessors, (1579), 786 states have call successors, (1579) [2022-11-02 20:28:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10200 states to 10200 states and 15918 transitions. [2022-11-02 20:28:52,413 INFO L78 Accepts]: Start accepts. Automaton has 10200 states and 15918 transitions. Word has length 90 [2022-11-02 20:28:52,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:52,414 INFO L495 AbstractCegarLoop]: Abstraction has 10200 states and 15918 transitions. [2022-11-02 20:28:52,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 10200 states and 15918 transitions. [2022-11-02 20:28:52,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-02 20:28:52,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:52,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:52,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:28:52,425 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:52,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:52,426 INFO L85 PathProgramCache]: Analyzing trace with hash -823621900, now seen corresponding path program 1 times [2022-11-02 20:28:52,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:52,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929929280] [2022-11-02 20:28:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:52,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:52,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:28:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:52,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:28:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:52,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:28:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:52,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:28:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:52,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:28:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:52,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:52,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929929280] [2022-11-02 20:28:52,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929929280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:52,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:52,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:28:52,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396277019] [2022-11-02 20:28:52,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:52,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:28:52,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:52,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:28:52,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:28:52,587 INFO L87 Difference]: Start difference. First operand 10200 states and 15918 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:56,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:56,444 INFO L93 Difference]: Finished difference Result 37168 states and 58490 transitions. [2022-11-02 20:28:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:28:56,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-11-02 20:28:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:56,563 INFO L225 Difference]: With dead ends: 37168 [2022-11-02 20:28:56,563 INFO L226 Difference]: Without dead ends: 26980 [2022-11-02 20:28:56,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:28:56,603 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 680 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:56,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 1344 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:28:56,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26980 states. [2022-11-02 20:28:58,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26980 to 20188. [2022-11-02 20:28:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20188 states, 17793 states have (on average 1.5173944809756645) internal successors, (26999), 17923 states have internal predecessors, (26999), 1492 states have call successors, (1492), 775 states have call predecessors, (1492), 902 states have return successors, (3805), 1617 states have call predecessors, (3805), 1490 states have call successors, (3805) [2022-11-02 20:28:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20188 states to 20188 states and 32296 transitions. [2022-11-02 20:28:58,761 INFO L78 Accepts]: Start accepts. Automaton has 20188 states and 32296 transitions. Word has length 90 [2022-11-02 20:28:58,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:58,761 INFO L495 AbstractCegarLoop]: Abstraction has 20188 states and 32296 transitions. [2022-11-02 20:28:58,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:28:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 20188 states and 32296 transitions. [2022-11-02 20:28:58,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-02 20:28:58,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:58,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:58,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:28:58,785 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:58,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:58,785 INFO L85 PathProgramCache]: Analyzing trace with hash 130318258, now seen corresponding path program 1 times [2022-11-02 20:28:58,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:58,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621307383] [2022-11-02 20:28:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:58,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:58,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:28:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:58,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:28:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:58,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:28:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:58,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:28:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:58,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:28:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:58,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:58,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621307383] [2022-11-02 20:28:58,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621307383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:58,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:58,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:28:58,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063593026] [2022-11-02 20:28:58,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:58,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:28:58,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:58,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:28:58,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:28:58,973 INFO L87 Difference]: Start difference. First operand 20188 states and 32296 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:29:04,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:04,556 INFO L93 Difference]: Finished difference Result 71542 states and 115470 transitions. [2022-11-02 20:29:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:29:04,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-11-02 20:29:04,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:04,786 INFO L225 Difference]: With dead ends: 71542 [2022-11-02 20:29:04,786 INFO L226 Difference]: Without dead ends: 51366 [2022-11-02 20:29:04,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:29:04,849 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 625 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:04,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 1352 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:29:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51366 states. [2022-11-02 20:29:08,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51366 to 40097. [2022-11-02 20:29:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40097 states, 35462 states have (on average 1.5214313913484856) internal successors, (53953), 35720 states have internal predecessors, (53953), 2836 states have call successors, (2836), 1543 states have call predecessors, (2836), 1798 states have return successors, (9651), 3089 states have call predecessors, (9651), 2834 states have call successors, (9651) [2022-11-02 20:29:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40097 states to 40097 states and 66440 transitions. [2022-11-02 20:29:08,764 INFO L78 Accepts]: Start accepts. Automaton has 40097 states and 66440 transitions. Word has length 90 [2022-11-02 20:29:08,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:08,764 INFO L495 AbstractCegarLoop]: Abstraction has 40097 states and 66440 transitions. [2022-11-02 20:29:08,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:29:08,765 INFO L276 IsEmpty]: Start isEmpty. Operand 40097 states and 66440 transitions. [2022-11-02 20:29:08,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-02 20:29:08,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:08,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:08,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:29:08,799 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:29:08,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:08,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1085835468, now seen corresponding path program 1 times [2022-11-02 20:29:08,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:08,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412966444] [2022-11-02 20:29:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:08,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:08,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:29:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:08,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:29:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:08,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:29:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:08,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:29:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:08,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:29:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:08,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:08,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412966444] [2022-11-02 20:29:08,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412966444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:29:08,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:29:08,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:29:08,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244106701] [2022-11-02 20:29:08,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:29:08,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:29:08,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:08,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:29:08,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:29:08,920 INFO L87 Difference]: Start difference. First operand 40097 states and 66440 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:29:16,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:16,618 INFO L93 Difference]: Finished difference Result 113501 states and 185325 transitions. [2022-11-02 20:29:16,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:29:16,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-11-02 20:29:16,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:16,909 INFO L225 Difference]: With dead ends: 113501 [2022-11-02 20:29:16,910 INFO L226 Difference]: Without dead ends: 73417 [2022-11-02 20:29:17,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:29:17,029 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 831 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:17,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 1094 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:29:17,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73417 states. [2022-11-02 20:29:21,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73417 to 59620. [2022-11-02 20:29:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59620 states, 52597 states have (on average 1.506892028062437) internal successors, (79258), 53112 states have internal predecessors, (79258), 4322 states have call successors, (4322), 2317 states have call predecessors, (4322), 2700 states have return successors, (13325), 4446 states have call predecessors, (13325), 4320 states have call successors, (13325) [2022-11-02 20:29:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59620 states to 59620 states and 96905 transitions. [2022-11-02 20:29:21,871 INFO L78 Accepts]: Start accepts. Automaton has 59620 states and 96905 transitions. Word has length 90 [2022-11-02 20:29:21,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:21,872 INFO L495 AbstractCegarLoop]: Abstraction has 59620 states and 96905 transitions. [2022-11-02 20:29:21,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:29:21,872 INFO L276 IsEmpty]: Start isEmpty. Operand 59620 states and 96905 transitions. [2022-11-02 20:29:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-02 20:29:22,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:22,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:22,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:29:22,022 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:29:22,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:22,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1103843070, now seen corresponding path program 1 times [2022-11-02 20:29:22,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:22,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560449408] [2022-11-02 20:29:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:22,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:22,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:29:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:22,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-02 20:29:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:22,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:29:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:22,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 20:29:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:22,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-02 20:29:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:22,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-02 20:29:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:22,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-02 20:29:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:22,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-02 20:29:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:29:22,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:22,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560449408] [2022-11-02 20:29:22,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560449408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:29:22,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849673281] [2022-11-02 20:29:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:22,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:29:22,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:29:22,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:29:22,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ce10a48-d9e9-4265-8174-dfce61e28d6e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:29:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:22,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:29:22,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:29:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:29:22,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:29:22,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849673281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:29:22,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:29:22,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-02 20:29:22,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507810796] [2022-11-02 20:29:22,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:29:22,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:29:22,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:22,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:29:22,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:29:22,521 INFO L87 Difference]: Start difference. First operand 59620 states and 96905 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-02 20:29:31,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:31,559 INFO L93 Difference]: Finished difference Result 177479 states and 290291 transitions. [2022-11-02 20:29:31,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:29:31,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 146 [2022-11-02 20:29:31,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:32,292 INFO L225 Difference]: With dead ends: 177479 [2022-11-02 20:29:32,292 INFO L226 Difference]: Without dead ends: 117872 [2022-11-02 20:29:32,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:29:32,463 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 222 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:32,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 536 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:29:32,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117872 states.