./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro --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 fee2fbeec3a60e447cd74345d2f8a46dc28fcea89eab2880c2a2ccd5802bfaa0 --- 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-8393723 [2022-11-18 20:09:28,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:09:28,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:09:28,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:09:28,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:09:28,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:09:28,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:09:28,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:09:28,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:09:28,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:09:28,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:09:28,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:09:28,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:09:28,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:09:28,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:09:28,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:09:28,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:09:28,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:09:28,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:09:28,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:09:28,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:09:28,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:09:28,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:09:28,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:09:28,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:09:28,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:09:28,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:09:28,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:09:28,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:09:28,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:09:28,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:09:28,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:09:28,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:09:28,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:09:28,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:09:28,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:09:28,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:09:28,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:09:28,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:09:28,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:09:28,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:09:28,485 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:09:28,525 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:09:28,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:09:28,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:09:28,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:09:28,536 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:09:28,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:09:28,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:09:28,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:09:28,538 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:09:28,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:09:28,540 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:09:28,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:09:28,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:09:28,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:09:28,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:09:28,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:09:28,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:09:28,542 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:09:28,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:09:28,543 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:09:28,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:09:28,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:09:28,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:09:28,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:09:28,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:09:28,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:09:28,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:09:28,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:09:28,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:09:28,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:09:28,548 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:09:28,548 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:09:28,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:09:28,549 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_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fee2fbeec3a60e447cd74345d2f8a46dc28fcea89eab2880c2a2ccd5802bfaa0 [2022-11-18 20:09:28,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:09:28,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:09:28,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:09:28,963 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:09:28,964 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:09:28,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c [2022-11-18 20:09:29,061 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/data/cdebbd7ff/26f9e62c35a74567b919d2bc8d2ce169/FLAG837850370 [2022-11-18 20:09:29,660 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:09:29,661 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c [2022-11-18 20:09:29,681 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/data/cdebbd7ff/26f9e62c35a74567b919d2bc8d2ce169/FLAG837850370 [2022-11-18 20:09:29,994 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/data/cdebbd7ff/26f9e62c35a74567b919d2bc8d2ce169 [2022-11-18 20:09:29,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:09:30,002 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:09:30,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:09:30,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:09:30,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:09:30,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:09:29" (1/1) ... [2022-11-18 20:09:30,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4126b9a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:09:30, skipping insertion in model container [2022-11-18 20:09:30,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:09:29" (1/1) ... [2022-11-18 20:09:30,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:09:30,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:09:30,426 WARN L234 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_80259a15-94a1-4831-91fb-53054c9ecbf7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[913,926] [2022-11-18 20:09:30,517 WARN L234 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_80259a15-94a1-4831-91fb-53054c9ecbf7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[5977,5990] [2022-11-18 20:09:30,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:09:30,664 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:09:30,685 WARN L234 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_80259a15-94a1-4831-91fb-53054c9ecbf7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[913,926] [2022-11-18 20:09:30,717 WARN L234 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_80259a15-94a1-4831-91fb-53054c9ecbf7/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-2.c[5977,5990] [2022-11-18 20:09:30,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:09:30,817 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:09:30,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:09:30 WrapperNode [2022-11-18 20:09:30,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:09:30,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:09:30,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:09:30,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:09:30,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:09:30" (1/1) ... [2022-11-18 20:09:30,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:09:30" (1/1) ... [2022-11-18 20:09:30,944 INFO L138 Inliner]: procedures = 60, calls = 66, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 707 [2022-11-18 20:09:30,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:09:30,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:09:30,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:09:30,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:09:30,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:09:30" (1/1) ... [2022-11-18 20:09:30,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:09:30" (1/1) ... [2022-11-18 20:09:30,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:09:30" (1/1) ... [2022-11-18 20:09:30,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:09:30" (1/1) ... [2022-11-18 20:09:30,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:09:30" (1/1) ... [2022-11-18 20:09:31,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:09:30" (1/1) ... [2022-11-18 20:09:31,009 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:09:30" (1/1) ... [2022-11-18 20:09:31,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:09:30" (1/1) ... [2022-11-18 20:09:31,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:09:31,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:09:31,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:09:31,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:09:31,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:09:30" (1/1) ... [2022-11-18 20:09:31,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:09:31,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:09:31,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:09:31,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:09:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:09:31,134 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-18 20:09:31,134 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-18 20:09:31,135 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-18 20:09:31,136 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-18 20:09:31,137 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-18 20:09:31,137 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-18 20:09:31,138 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-18 20:09:31,138 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-18 20:09:31,139 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-18 20:09:31,139 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-18 20:09:31,139 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-18 20:09:31,139 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-18 20:09:31,140 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-18 20:09:31,140 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-18 20:09:31,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:09:31,140 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-18 20:09:31,141 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-18 20:09:31,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:09:31,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:09:31,141 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-18 20:09:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-18 20:09:31,304 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:09:31,321 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:09:32,308 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:09:32,326 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:09:32,326 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-11-18 20:09:32,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:09:32 BoogieIcfgContainer [2022-11-18 20:09:32,329 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:09:32,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:09:32,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:09:32,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:09:32,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:09:29" (1/3) ... [2022-11-18 20:09:32,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbca0ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:09:32, skipping insertion in model container [2022-11-18 20:09:32,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:09:30" (2/3) ... [2022-11-18 20:09:32,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbca0ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:09:32, skipping insertion in model container [2022-11-18 20:09:32,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:09:32" (3/3) ... [2022-11-18 20:09:32,341 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.06.cil-2.c [2022-11-18 20:09:32,366 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:09:32,366 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 20:09:32,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:09:32,459 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;@4cb376ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:09:32,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 20:09:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 304 states, 266 states have (on average 1.6165413533834587) internal successors, (430), 271 states have internal predecessors, (430), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-18 20:09:32,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 20:09:32,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:32,485 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] [2022-11-18 20:09:32,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:32,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:32,492 INFO L85 PathProgramCache]: Analyzing trace with hash 241616146, now seen corresponding path program 1 times [2022-11-18 20:09:32,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:32,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81417156] [2022-11-18 20:09:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:32,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:33,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 20:09:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:33,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-18 20:09:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:33,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:33,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81417156] [2022-11-18 20:09:33,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81417156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:09:33,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:09:33,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:09:33,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103176988] [2022-11-18 20:09:33,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:33,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:09:33,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:33,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:09:33,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:09:33,181 INFO L87 Difference]: Start difference. First operand has 304 states, 266 states have (on average 1.6165413533834587) internal successors, (430), 271 states have internal predecessors, (430), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 20:09:34,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:34,013 INFO L93 Difference]: Finished difference Result 659 states and 1044 transitions. [2022-11-18 20:09:34,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:09:34,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-11-18 20:09:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:34,036 INFO L225 Difference]: With dead ends: 659 [2022-11-18 20:09:34,036 INFO L226 Difference]: Without dead ends: 364 [2022-11-18 20:09:34,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:09:34,046 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 584 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:34,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 613 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:09:34,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-11-18 20:09:34,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 358. [2022-11-18 20:09:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 315 states have (on average 1.488888888888889) internal successors, (469), 319 states have internal predecessors, (469), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (34), 28 states have call predecessors, (34), 28 states have call successors, (34) [2022-11-18 20:09:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 533 transitions. [2022-11-18 20:09:34,169 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 533 transitions. Word has length 44 [2022-11-18 20:09:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:34,170 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 533 transitions. [2022-11-18 20:09:34,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 20:09:34,170 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 533 transitions. [2022-11-18 20:09:34,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:09:34,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:34,174 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] [2022-11-18 20:09:34,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:09:34,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:34,176 INFO L85 PathProgramCache]: Analyzing trace with hash 283852217, now seen corresponding path program 1 times [2022-11-18 20:09:34,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:34,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729442629] [2022-11-18 20:09:34,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:34,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:34,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 20:09:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:34,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:09:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:34,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:34,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729442629] [2022-11-18 20:09:34,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729442629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:09:34,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:09:34,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:09:34,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490214864] [2022-11-18 20:09:34,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:34,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:09:34,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:34,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:09:34,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:09:34,307 INFO L87 Difference]: Start difference. First operand 358 states and 533 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 20:09:35,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:35,038 INFO L93 Difference]: Finished difference Result 606 states and 873 transitions. [2022-11-18 20:09:35,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:09:35,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-18 20:09:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:35,055 INFO L225 Difference]: With dead ends: 606 [2022-11-18 20:09:35,055 INFO L226 Difference]: Without dead ends: 482 [2022-11-18 20:09:35,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:09:35,064 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 249 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:35,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 815 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:09:35,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-11-18 20:09:35,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 425. [2022-11-18 20:09:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 376 states have (on average 1.4707446808510638) internal successors, (553), 380 states have internal predecessors, (553), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (37), 31 states have call predecessors, (37), 31 states have call successors, (37) [2022-11-18 20:09:35,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 623 transitions. [2022-11-18 20:09:35,112 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 623 transitions. Word has length 45 [2022-11-18 20:09:35,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:35,113 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 623 transitions. [2022-11-18 20:09:35,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 20:09:35,113 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 623 transitions. [2022-11-18 20:09:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:09:35,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:35,116 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] [2022-11-18 20:09:35,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:09:35,117 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:35,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:35,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1000505244, now seen corresponding path program 1 times [2022-11-18 20:09:35,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:35,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359787674] [2022-11-18 20:09:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:35,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:35,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:35,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 20:09:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:35,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:09:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:35,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:35,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359787674] [2022-11-18 20:09:35,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359787674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:09:35,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:09:35,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:09:35,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465245085] [2022-11-18 20:09:35,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:35,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:09:35,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:35,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:09:35,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:09:35,207 INFO L87 Difference]: Start difference. First operand 425 states and 623 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 20:09:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:35,701 INFO L93 Difference]: Finished difference Result 833 states and 1182 transitions. [2022-11-18 20:09:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:09:35,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-18 20:09:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:35,706 INFO L225 Difference]: With dead ends: 833 [2022-11-18 20:09:35,707 INFO L226 Difference]: Without dead ends: 642 [2022-11-18 20:09:35,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:09:35,709 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 593 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:35,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 608 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:09:35,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-11-18 20:09:35,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 590. [2022-11-18 20:09:35,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 522 states have (on average 1.4233716475095786) internal successors, (743), 529 states have internal predecessors, (743), 44 states have call successors, (44), 21 states have call predecessors, (44), 22 states have return successors, (54), 40 states have call predecessors, (54), 42 states have call successors, (54) [2022-11-18 20:09:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 841 transitions. [2022-11-18 20:09:35,764 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 841 transitions. Word has length 45 [2022-11-18 20:09:35,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:35,765 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 841 transitions. [2022-11-18 20:09:35,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 20:09:35,766 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 841 transitions. [2022-11-18 20:09:35,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-18 20:09:35,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:35,769 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 20:09:35,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:09:35,770 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:35,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:35,771 INFO L85 PathProgramCache]: Analyzing trace with hash 595494690, now seen corresponding path program 1 times [2022-11-18 20:09:35,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:35,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761532501] [2022-11-18 20:09:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:35,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:35,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 20:09:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:35,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-18 20:09:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:35,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 20:09:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:09:35,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:35,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761532501] [2022-11-18 20:09:35,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761532501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:09:35,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:09:35,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:09:35,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534051312] [2022-11-18 20:09:35,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:35,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:09:35,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:35,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:09:35,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:09:35,890 INFO L87 Difference]: Start difference. First operand 590 states and 841 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:09:36,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:36,524 INFO L93 Difference]: Finished difference Result 1174 states and 1626 transitions. [2022-11-18 20:09:36,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:09:36,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-11-18 20:09:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:36,537 INFO L225 Difference]: With dead ends: 1174 [2022-11-18 20:09:36,537 INFO L226 Difference]: Without dead ends: 818 [2022-11-18 20:09:36,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:09:36,551 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 233 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:36,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 867 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:09:36,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-11-18 20:09:36,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 780. [2022-11-18 20:09:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 688 states have (on average 1.370639534883721) internal successors, (943), 697 states have internal predecessors, (943), 58 states have call successors, (58), 29 states have call predecessors, (58), 32 states have return successors, (78), 54 states have call predecessors, (78), 56 states have call successors, (78) [2022-11-18 20:09:36,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1079 transitions. [2022-11-18 20:09:36,646 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1079 transitions. Word has length 62 [2022-11-18 20:09:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:36,649 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 1079 transitions. [2022-11-18 20:09:36,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:09:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1079 transitions. [2022-11-18 20:09:36,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-18 20:09:36,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:36,655 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 20:09:36,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:09:36,657 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:36,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:36,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1015259381, now seen corresponding path program 1 times [2022-11-18 20:09:36,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:36,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049396713] [2022-11-18 20:09:36,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:36,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:36,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 20:09:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:36,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-18 20:09:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:36,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-18 20:09:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-18 20:09:36,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:36,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049396713] [2022-11-18 20:09:36,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049396713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:09:36,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:09:36,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:09:36,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090354791] [2022-11-18 20:09:36,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:36,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:09:36,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:36,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:09:36,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:09:36,805 INFO L87 Difference]: Start difference. First operand 780 states and 1079 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:09:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:37,298 INFO L93 Difference]: Finished difference Result 1433 states and 1932 transitions. [2022-11-18 20:09:37,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:09:37,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-11-18 20:09:37,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:37,306 INFO L225 Difference]: With dead ends: 1433 [2022-11-18 20:09:37,306 INFO L226 Difference]: Without dead ends: 979 [2022-11-18 20:09:37,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:09:37,309 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 580 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:37,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 606 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:09:37,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-11-18 20:09:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 924. [2022-11-18 20:09:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 816 states have (on average 1.3406862745098038) internal successors, (1094), 827 states have internal predecessors, (1094), 66 states have call successors, (66), 35 states have call predecessors, (66), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2022-11-18 20:09:37,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1252 transitions. [2022-11-18 20:09:37,391 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1252 transitions. Word has length 67 [2022-11-18 20:09:37,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:37,392 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1252 transitions. [2022-11-18 20:09:37,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 20:09:37,392 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1252 transitions. [2022-11-18 20:09:37,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 20:09:37,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:37,395 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 20:09:37,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:09:37,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:37,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:37,397 INFO L85 PathProgramCache]: Analyzing trace with hash -307618110, now seen corresponding path program 1 times [2022-11-18 20:09:37,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:37,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465824255] [2022-11-18 20:09:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:37,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:37,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 20:09:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:37,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 20:09:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:37,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 20:09:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:09:37,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:37,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465824255] [2022-11-18 20:09:37,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465824255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:09:37,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060170117] [2022-11-18 20:09:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:37,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:37,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:09:37,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:09:37,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:09:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:37,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:09:37,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:09:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:37,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:09:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 20:09:38,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060170117] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:09:38,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:09:38,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-11-18 20:09:38,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923543902] [2022-11-18 20:09:38,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:38,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:09:38,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:38,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:09:38,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:09:38,082 INFO L87 Difference]: Start difference. First operand 924 states and 1252 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:09:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:38,370 INFO L93 Difference]: Finished difference Result 980 states and 1320 transitions. [2022-11-18 20:09:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:09:38,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-11-18 20:09:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:38,378 INFO L225 Difference]: With dead ends: 980 [2022-11-18 20:09:38,378 INFO L226 Difference]: Without dead ends: 977 [2022-11-18 20:09:38,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:09:38,382 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 791 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:38,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 534 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:09:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-11-18 20:09:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 923. [2022-11-18 20:09:38,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 816 states have (on average 1.338235294117647) internal successors, (1092), 826 states have internal predecessors, (1092), 65 states have call successors, (65), 35 states have call predecessors, (65), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2022-11-18 20:09:38,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1249 transitions. [2022-11-18 20:09:38,487 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1249 transitions. Word has length 68 [2022-11-18 20:09:38,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:38,490 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1249 transitions. [2022-11-18 20:09:38,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:09:38,491 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1249 transitions. [2022-11-18 20:09:38,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 20:09:38,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:38,494 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 20:09:38,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 20:09:38,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:38,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:38,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:38,702 INFO L85 PathProgramCache]: Analyzing trace with hash -947179730, now seen corresponding path program 1 times [2022-11-18 20:09:38,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:38,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186580308] [2022-11-18 20:09:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:38,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:38,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 20:09:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:38,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 20:09:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:38,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-18 20:09:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:09:38,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:38,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186580308] [2022-11-18 20:09:38,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186580308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:09:38,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924905757] [2022-11-18 20:09:38,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:38,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:38,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:09:38,891 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:09:38,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:09:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:39,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:09:39,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:09:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:39,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:09:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 20:09:39,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924905757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:09:39,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:09:39,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-11-18 20:09:39,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86107307] [2022-11-18 20:09:39,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:09:39,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:09:39,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:39,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:09:39,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:09:39,587 INFO L87 Difference]: Start difference. First operand 923 states and 1249 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-18 20:09:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:41,894 INFO L93 Difference]: Finished difference Result 2623 states and 3469 transitions. [2022-11-18 20:09:41,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 20:09:41,895 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-11-18 20:09:41,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:41,904 INFO L225 Difference]: With dead ends: 2623 [2022-11-18 20:09:41,904 INFO L226 Difference]: Without dead ends: 2079 [2022-11-18 20:09:41,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:09:41,912 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 905 mSDsluCounter, 2635 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:41,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 3048 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1733 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-18 20:09:41,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2022-11-18 20:09:42,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1312. [2022-11-18 20:09:42,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1166 states have (on average 1.3087478559176673) internal successors, (1526), 1184 states have internal predecessors, (1526), 85 states have call successors, (85), 49 states have call predecessors, (85), 59 states have return successors, (126), 79 states have call predecessors, (126), 84 states have call successors, (126) [2022-11-18 20:09:42,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1737 transitions. [2022-11-18 20:09:42,061 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1737 transitions. Word has length 69 [2022-11-18 20:09:42,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:42,062 INFO L495 AbstractCegarLoop]: Abstraction has 1312 states and 1737 transitions. [2022-11-18 20:09:42,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-18 20:09:42,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1737 transitions. [2022-11-18 20:09:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-18 20:09:42,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:42,066 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-18 20:09:42,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:09:42,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:09:42,281 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:42,281 INFO L85 PathProgramCache]: Analyzing trace with hash 172675214, now seen corresponding path program 1 times [2022-11-18 20:09:42,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:42,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919069289] [2022-11-18 20:09:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:42,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:42,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 20:09:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:42,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 20:09:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:42,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-18 20:09:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:42,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-18 20:09:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 20:09:42,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:42,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919069289] [2022-11-18 20:09:42,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919069289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:09:42,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400884341] [2022-11-18 20:09:42,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:42,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:42,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:09:42,517 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:09:42,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:09:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:42,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:09:42,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:09:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 20:09:42,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:09:42,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400884341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:09:42,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:09:42,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-18 20:09:42,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033178054] [2022-11-18 20:09:42,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:42,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:09:42,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:42,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:09:42,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:09:42,733 INFO L87 Difference]: Start difference. First operand 1312 states and 1737 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:09:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:42,872 INFO L93 Difference]: Finished difference Result 2035 states and 2675 transitions. [2022-11-18 20:09:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:09:42,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-11-18 20:09:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:42,882 INFO L225 Difference]: With dead ends: 2035 [2022-11-18 20:09:42,882 INFO L226 Difference]: Without dead ends: 1190 [2022-11-18 20:09:42,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:09:42,886 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 402 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:42,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 548 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:09:42,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-11-18 20:09:42,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1175. [2022-11-18 20:09:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1045 states have (on average 1.309090909090909) internal successors, (1368), 1062 states have internal predecessors, (1368), 77 states have call successors, (77), 43 states have call predecessors, (77), 51 states have return successors, (112), 70 states have call predecessors, (112), 76 states have call successors, (112) [2022-11-18 20:09:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1557 transitions. [2022-11-18 20:09:43,009 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1557 transitions. Word has length 88 [2022-11-18 20:09:43,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:43,010 INFO L495 AbstractCegarLoop]: Abstraction has 1175 states and 1557 transitions. [2022-11-18 20:09:43,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:09:43,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1557 transitions. [2022-11-18 20:09:43,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-18 20:09:43,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:43,023 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:09:43,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:09:43,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:09:43,231 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:43,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:43,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1628325681, now seen corresponding path program 1 times [2022-11-18 20:09:43,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:43,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684778424] [2022-11-18 20:09:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:43,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:43,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-18 20:09:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:43,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-18 20:09:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:43,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-18 20:09:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:43,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-18 20:09:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:43,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-18 20:09:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:09:43,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:43,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684778424] [2022-11-18 20:09:43,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684778424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:09:43,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873419959] [2022-11-18 20:09:43,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:43,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:43,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:09:43,395 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:09:43,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:09:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:43,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:09:43,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:09:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 20:09:43,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:09:43,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873419959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:09:43,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:09:43,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-18 20:09:43,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270516117] [2022-11-18 20:09:43,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:43,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:09:43,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:43,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:09:43,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:09:43,615 INFO L87 Difference]: Start difference. First operand 1175 states and 1557 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 20:09:43,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:43,718 INFO L93 Difference]: Finished difference Result 1554 states and 2025 transitions. [2022-11-18 20:09:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:09:43,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-11-18 20:09:43,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:43,721 INFO L225 Difference]: With dead ends: 1554 [2022-11-18 20:09:43,721 INFO L226 Difference]: Without dead ends: 228 [2022-11-18 20:09:43,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:09:43,725 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 62 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:43,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 904 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:09:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-18 20:09:43,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2022-11-18 20:09:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 201 states have (on average 1.5422885572139304) internal successors, (310), 202 states have internal predecessors, (310), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-18 20:09:43,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 350 transitions. [2022-11-18 20:09:43,748 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 350 transitions. Word has length 103 [2022-11-18 20:09:43,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:43,748 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 350 transitions. [2022-11-18 20:09:43,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 20:09:43,749 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 350 transitions. [2022-11-18 20:09:43,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 20:09:43,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:43,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:09:43,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:09:43,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80259a15-94a1-4831-91fb-53054c9ecbf7/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:43,959 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:43,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:43,960 INFO L85 PathProgramCache]: Analyzing trace with hash -678480864, now seen corresponding path program 1 times [2022-11-18 20:09:43,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:43,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991946844] [2022-11-18 20:09:43,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:43,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:44,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 20:09:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:44,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:09:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:44,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:09:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:44,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 20:09:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:44,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 20:09:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:44,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:44,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991946844] [2022-11-18 20:09:44,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991946844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:09:44,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:09:44,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:09:44,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863020142] [2022-11-18 20:09:44,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:44,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:09:44,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:44,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:09:44,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:09:44,089 INFO L87 Difference]: Start difference. First operand 228 states and 350 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:09:45,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:45,414 INFO L93 Difference]: Finished difference Result 522 states and 816 transitions. [2022-11-18 20:09:45,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:09:45,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2022-11-18 20:09:45,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:45,418 INFO L225 Difference]: With dead ends: 522 [2022-11-18 20:09:45,418 INFO L226 Difference]: Without dead ends: 304 [2022-11-18 20:09:45,419 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 [2022-11-18 20:09:45,420 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 581 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:45,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 448 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 20:09:45,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-18 20:09:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 228. [2022-11-18 20:09:45,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 201 states have (on average 1.537313432835821) internal successors, (309), 202 states have internal predecessors, (309), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-18 20:09:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 349 transitions. [2022-11-18 20:09:45,469 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 349 transitions. Word has length 112 [2022-11-18 20:09:45,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:45,470 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 349 transitions. [2022-11-18 20:09:45,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:09:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 349 transitions. [2022-11-18 20:09:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 20:09:45,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:45,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:09:45,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 20:09:45,475 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:45,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:45,477 INFO L85 PathProgramCache]: Analyzing trace with hash 628661534, now seen corresponding path program 1 times [2022-11-18 20:09:45,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:45,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079787571] [2022-11-18 20:09:45,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:45,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:45,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 20:09:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:45,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:09:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:45,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:09:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:45,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 20:09:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:45,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 20:09:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:45,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:45,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079787571] [2022-11-18 20:09:45,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079787571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:09:45,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:09:45,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:09:45,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930702105] [2022-11-18 20:09:45,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:45,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:09:45,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:45,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:09:45,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:09:45,702 INFO L87 Difference]: Start difference. First operand 228 states and 349 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:09:48,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:48,289 INFO L93 Difference]: Finished difference Result 812 states and 1276 transitions. [2022-11-18 20:09:48,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:09:48,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2022-11-18 20:09:48,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:48,294 INFO L225 Difference]: With dead ends: 812 [2022-11-18 20:09:48,294 INFO L226 Difference]: Without dead ends: 599 [2022-11-18 20:09:48,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:09:48,296 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 877 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:48,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 786 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-18 20:09:48,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-11-18 20:09:48,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 448. [2022-11-18 20:09:48,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 399 states have (on average 1.5513784461152882) internal successors, (619), 401 states have internal predecessors, (619), 35 states have call successors, (35), 12 states have call predecessors, (35), 13 states have return successors, (38), 35 states have call predecessors, (38), 35 states have call successors, (38) [2022-11-18 20:09:48,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 692 transitions. [2022-11-18 20:09:48,365 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 692 transitions. Word has length 112 [2022-11-18 20:09:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:48,366 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 692 transitions. [2022-11-18 20:09:48,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:09:48,366 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 692 transitions. [2022-11-18 20:09:48,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 20:09:48,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:48,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:09:48,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 20:09:48,369 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:48,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:48,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1907660194, now seen corresponding path program 1 times [2022-11-18 20:09:48,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:48,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80414301] [2022-11-18 20:09:48,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:48,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:48,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 20:09:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:48,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:09:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:48,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:09:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:48,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 20:09:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:48,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 20:09:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:48,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:48,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80414301] [2022-11-18 20:09:48,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80414301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:09:48,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:09:48,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:09:48,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947250436] [2022-11-18 20:09:48,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:48,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:09:48,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:48,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:09:48,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:09:48,658 INFO L87 Difference]: Start difference. First operand 448 states and 692 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:09:51,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:51,535 INFO L93 Difference]: Finished difference Result 1335 states and 2096 transitions. [2022-11-18 20:09:51,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:09:51,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2022-11-18 20:09:51,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:51,542 INFO L225 Difference]: With dead ends: 1335 [2022-11-18 20:09:51,542 INFO L226 Difference]: Without dead ends: 902 [2022-11-18 20:09:51,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:09:51,548 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 949 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:51,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 1007 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1792 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-18 20:09:51,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-11-18 20:09:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 653. [2022-11-18 20:09:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 582 states have (on average 1.5446735395189004) internal successors, (899), 585 states have internal predecessors, (899), 50 states have call successors, (50), 18 states have call predecessors, (50), 20 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2022-11-18 20:09:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1004 transitions. [2022-11-18 20:09:51,650 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1004 transitions. Word has length 112 [2022-11-18 20:09:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:51,651 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 1004 transitions. [2022-11-18 20:09:51,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:09:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1004 transitions. [2022-11-18 20:09:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 20:09:51,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:51,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:09:51,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 20:09:51,654 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:51,656 INFO L85 PathProgramCache]: Analyzing trace with hash 288685280, now seen corresponding path program 1 times [2022-11-18 20:09:51,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:51,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297505881] [2022-11-18 20:09:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:51,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:51,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 20:09:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:51,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:09:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:51,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:09:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:51,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 20:09:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:51,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 20:09:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:51,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:51,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297505881] [2022-11-18 20:09:51,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297505881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:09:51,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:09:51,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:09:51,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479214766] [2022-11-18 20:09:51,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:51,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:09:51,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:51,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:09:51,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:09:51,927 INFO L87 Difference]: Start difference. First operand 653 states and 1004 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:09:54,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:54,969 INFO L93 Difference]: Finished difference Result 2104 states and 3296 transitions. [2022-11-18 20:09:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:09:54,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2022-11-18 20:09:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:54,984 INFO L225 Difference]: With dead ends: 2104 [2022-11-18 20:09:54,984 INFO L226 Difference]: Without dead ends: 1466 [2022-11-18 20:09:54,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:09:54,989 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 900 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:54,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [913 Valid, 1442 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1970 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-18 20:09:54,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2022-11-18 20:09:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1067. [2022-11-18 20:09:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 952 states have (on average 1.5399159663865547) internal successors, (1466), 957 states have internal predecessors, (1466), 80 states have call successors, (80), 30 states have call predecessors, (80), 34 states have return successors, (93), 83 states have call predecessors, (93), 80 states have call successors, (93) [2022-11-18 20:09:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1639 transitions. [2022-11-18 20:09:55,165 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1639 transitions. Word has length 112 [2022-11-18 20:09:55,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:55,165 INFO L495 AbstractCegarLoop]: Abstraction has 1067 states and 1639 transitions. [2022-11-18 20:09:55,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:09:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1639 transitions. [2022-11-18 20:09:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 20:09:55,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:55,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:09:55,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 20:09:55,169 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:55,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:55,169 INFO L85 PathProgramCache]: Analyzing trace with hash 260184990, now seen corresponding path program 1 times [2022-11-18 20:09:55,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:55,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540963364] [2022-11-18 20:09:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:55,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:55,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 20:09:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:55,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:09:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:55,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:09:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:55,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 20:09:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:55,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 20:09:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:55,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:55,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540963364] [2022-11-18 20:09:55,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540963364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:09:55,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:09:55,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:09:55,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196815342] [2022-11-18 20:09:55,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:55,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:09:55,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:55,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:09:55,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:09:55,449 INFO L87 Difference]: Start difference. First operand 1067 states and 1639 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:09:58,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:58,651 INFO L93 Difference]: Finished difference Result 3592 states and 5607 transitions. [2022-11-18 20:09:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:09:58,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2022-11-18 20:09:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:58,669 INFO L225 Difference]: With dead ends: 3592 [2022-11-18 20:09:58,669 INFO L226 Difference]: Without dead ends: 2540 [2022-11-18 20:09:58,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:09:58,675 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 895 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:58,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1442 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1953 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-18 20:09:58,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2022-11-18 20:09:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 1896. [2022-11-18 20:09:59,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1693 states have (on average 1.5357353809805079) internal successors, (2600), 1702 states have internal predecessors, (2600), 140 states have call successors, (140), 54 states have call predecessors, (140), 62 states have return successors, (175), 147 states have call predecessors, (175), 140 states have call successors, (175) [2022-11-18 20:09:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2915 transitions. [2022-11-18 20:09:59,010 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2915 transitions. Word has length 112 [2022-11-18 20:09:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:59,010 INFO L495 AbstractCegarLoop]: Abstraction has 1896 states and 2915 transitions. [2022-11-18 20:09:59,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:09:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2915 transitions. [2022-11-18 20:09:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 20:09:59,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:59,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:09:59,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 20:09:59,015 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:09:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:59,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1680397024, now seen corresponding path program 1 times [2022-11-18 20:09:59,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:09:59,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054086419] [2022-11-18 20:09:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:09:59,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:09:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:59,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 20:09:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:59,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:09:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:59,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:09:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:59,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 20:09:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:59,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 20:09:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:09:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:09:59,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:09:59,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054086419] [2022-11-18 20:09:59,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054086419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:09:59,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:09:59,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:09:59,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317557565] [2022-11-18 20:09:59,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:09:59,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:09:59,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:59,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:09:59,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:09:59,277 INFO L87 Difference]: Start difference. First operand 1896 states and 2915 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:10:02,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:02,855 INFO L93 Difference]: Finished difference Result 6567 states and 10245 transitions. [2022-11-18 20:10:02,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:10:02,856 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2022-11-18 20:10:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:02,883 INFO L225 Difference]: With dead ends: 6567 [2022-11-18 20:10:02,883 INFO L226 Difference]: Without dead ends: 4686 [2022-11-18 20:10:02,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:10:02,895 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 894 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:02,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 1442 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-18 20:10:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2022-11-18 20:10:03,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 3561. [2022-11-18 20:10:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3182 states have (on average 1.5329981143934632) internal successors, (4878), 3199 states have internal predecessors, (4878), 260 states have call successors, (260), 102 states have call predecessors, (260), 118 states have return successors, (357), 275 states have call predecessors, (357), 260 states have call successors, (357) [2022-11-18 20:10:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 5495 transitions. [2022-11-18 20:10:03,559 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 5495 transitions. Word has length 112 [2022-11-18 20:10:03,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:03,560 INFO L495 AbstractCegarLoop]: Abstraction has 3561 states and 5495 transitions. [2022-11-18 20:10:03,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:10:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 5495 transitions. [2022-11-18 20:10:03,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 20:10:03,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:03,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:03,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 20:10:03,566 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:10:03,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:03,567 INFO L85 PathProgramCache]: Analyzing trace with hash 196666206, now seen corresponding path program 1 times [2022-11-18 20:10:03,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:03,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582044544] [2022-11-18 20:10:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:03,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:03,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:03,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 20:10:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:03,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:10:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:03,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:10:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:03,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 20:10:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:03,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 20:10:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:03,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:03,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582044544] [2022-11-18 20:10:03,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582044544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:10:03,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:10:03,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:10:03,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637768130] [2022-11-18 20:10:03,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:10:03,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:10:03,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:03,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:10:03,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:10:03,800 INFO L87 Difference]: Start difference. First operand 3561 states and 5495 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:10:07,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:07,588 INFO L93 Difference]: Finished difference Result 12518 states and 19583 transitions. [2022-11-18 20:10:07,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:10:07,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2022-11-18 20:10:07,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:07,655 INFO L225 Difference]: With dead ends: 12518 [2022-11-18 20:10:07,655 INFO L226 Difference]: Without dead ends: 8972 [2022-11-18 20:10:07,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:10:07,671 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 893 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:07,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 1442 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1927 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-18 20:10:07,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8972 states. [2022-11-18 20:10:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8972 to 6906. [2022-11-18 20:10:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6906 states, 6175 states have (on average 1.531336032388664) internal successors, (9456), 6208 states have internal predecessors, (9456), 500 states have call successors, (500), 198 states have call predecessors, (500), 230 states have return successors, (775), 531 states have call predecessors, (775), 500 states have call successors, (775) [2022-11-18 20:10:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6906 states to 6906 states and 10731 transitions. [2022-11-18 20:10:08,939 INFO L78 Accepts]: Start accepts. Automaton has 6906 states and 10731 transitions. Word has length 112 [2022-11-18 20:10:08,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:08,940 INFO L495 AbstractCegarLoop]: Abstraction has 6906 states and 10731 transitions. [2022-11-18 20:10:08,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:10:08,940 INFO L276 IsEmpty]: Start isEmpty. Operand 6906 states and 10731 transitions. [2022-11-18 20:10:08,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 20:10:08,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:08,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:08,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 20:10:08,949 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:10:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:08,949 INFO L85 PathProgramCache]: Analyzing trace with hash -574067360, now seen corresponding path program 1 times [2022-11-18 20:10:08,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:08,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716299165] [2022-11-18 20:10:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:08,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:09,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 20:10:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:09,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:10:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:09,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:10:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:09,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 20:10:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:09,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 20:10:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:09,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:09,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716299165] [2022-11-18 20:10:09,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716299165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:10:09,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:10:09,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:10:09,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820229081] [2022-11-18 20:10:09,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:10:09,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:10:09,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:09,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:10:09,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:10:09,168 INFO L87 Difference]: Start difference. First operand 6906 states and 10731 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:10:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:15,679 INFO L93 Difference]: Finished difference Result 27397 states and 42935 transitions. [2022-11-18 20:10:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:10:15,680 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2022-11-18 20:10:15,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:15,786 INFO L225 Difference]: With dead ends: 27397 [2022-11-18 20:10:15,786 INFO L226 Difference]: Without dead ends: 20506 [2022-11-18 20:10:15,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:10:15,820 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 955 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:15,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [967 Valid, 1432 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-18 20:10:15,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20506 states. [2022-11-18 20:10:18,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20506 to 13531. [2022-11-18 20:10:18,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13531 states, 12128 states have (on average 1.533146437994723) internal successors, (18594), 12193 states have internal predecessors, (18594), 948 states have call successors, (948), 390 states have call predecessors, (948), 454 states have return successors, (1741), 1011 states have call predecessors, (1741), 948 states have call successors, (1741) [2022-11-18 20:10:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13531 states to 13531 states and 21283 transitions. [2022-11-18 20:10:18,207 INFO L78 Accepts]: Start accepts. Automaton has 13531 states and 21283 transitions. Word has length 112 [2022-11-18 20:10:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:18,208 INFO L495 AbstractCegarLoop]: Abstraction has 13531 states and 21283 transitions. [2022-11-18 20:10:18,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:10:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 13531 states and 21283 transitions. [2022-11-18 20:10:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 20:10:18,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:18,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:18,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 20:10:18,224 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:10:18,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:18,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1568761058, now seen corresponding path program 1 times [2022-11-18 20:10:18,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:18,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485778048] [2022-11-18 20:10:18,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:18,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:18,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 20:10:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:18,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:10:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:18,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:10:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:18,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 20:10:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:18,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 20:10:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:18,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:18,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485778048] [2022-11-18 20:10:18,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485778048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:10:18,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:10:18,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:10:18,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097495814] [2022-11-18 20:10:18,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:10:18,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:10:18,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:18,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:10:18,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:10:18,425 INFO L87 Difference]: Start difference. First operand 13531 states and 21283 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:10:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:27,805 INFO L93 Difference]: Finished difference Result 53124 states and 84157 transitions. [2022-11-18 20:10:27,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:10:27,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2022-11-18 20:10:27,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:27,998 INFO L225 Difference]: With dead ends: 53124 [2022-11-18 20:10:27,998 INFO L226 Difference]: Without dead ends: 39608 [2022-11-18 20:10:28,063 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 [2022-11-18 20:10:28,064 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 1103 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:28,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 1428 Invalid, 1952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1893 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-18 20:10:28,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39608 states. [2022-11-18 20:10:32,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39608 to 26428. [2022-11-18 20:10:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26428 states, 23713 states have (on average 1.534516931640872) internal successors, (36388), 23842 states have internal predecessors, (36388), 1812 states have call successors, (1812), 774 states have call predecessors, (1812), 902 states have return successors, (4127), 1939 states have call predecessors, (4127), 1812 states have call successors, (4127) [2022-11-18 20:10:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26428 states to 26428 states and 42327 transitions. [2022-11-18 20:10:32,996 INFO L78 Accepts]: Start accepts. Automaton has 26428 states and 42327 transitions. Word has length 112 [2022-11-18 20:10:32,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:32,997 INFO L495 AbstractCegarLoop]: Abstraction has 26428 states and 42327 transitions. [2022-11-18 20:10:32,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:10:32,997 INFO L276 IsEmpty]: Start isEmpty. Operand 26428 states and 42327 transitions. [2022-11-18 20:10:33,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 20:10:33,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:33,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:33,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 20:10:33,022 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:10:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:33,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2139930016, now seen corresponding path program 1 times [2022-11-18 20:10:33,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:33,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901773204] [2022-11-18 20:10:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:33,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:33,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 20:10:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:33,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:10:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:33,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:10:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:33,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 20:10:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:33,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 20:10:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:33,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:33,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901773204] [2022-11-18 20:10:33,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901773204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:10:33,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:10:33,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:10:33,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852430553] [2022-11-18 20:10:33,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:10:33,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:10:33,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:33,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:10:33,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:10:33,230 INFO L87 Difference]: Start difference. First operand 26428 states and 42327 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:10:50,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:50,118 INFO L93 Difference]: Finished difference Result 102435 states and 165059 transitions. [2022-11-18 20:10:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:10:50,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2022-11-18 20:10:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:50,550 INFO L225 Difference]: With dead ends: 102435 [2022-11-18 20:10:50,550 INFO L226 Difference]: Without dead ends: 76022 [2022-11-18 20:10:50,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:10:50,664 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 1122 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:50,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 941 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-18 20:10:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76022 states. [2022-11-18 20:10:59,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76022 to 52477. [2022-11-18 20:10:59,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52477 states, 47202 states have (on average 1.5370111435956104) internal successors, (72550), 47459 states have internal predecessors, (72550), 3476 states have call successors, (3476), 1542 states have call predecessors, (3476), 1798 states have return successors, (10293), 3731 states have call predecessors, (10293), 3476 states have call successors, (10293) [2022-11-18 20:10:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52477 states to 52477 states and 86319 transitions. [2022-11-18 20:10:59,358 INFO L78 Accepts]: Start accepts. Automaton has 52477 states and 86319 transitions. Word has length 112 [2022-11-18 20:10:59,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:59,359 INFO L495 AbstractCegarLoop]: Abstraction has 52477 states and 86319 transitions. [2022-11-18 20:10:59,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:10:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 52477 states and 86319 transitions. [2022-11-18 20:10:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 20:10:59,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:59,406 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:59,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-18 20:10:59,407 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:10:59,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:59,407 INFO L85 PathProgramCache]: Analyzing trace with hash 181355230, now seen corresponding path program 1 times [2022-11-18 20:10:59,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:59,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824352644] [2022-11-18 20:10:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:59,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:59,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-18 20:10:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:59,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:10:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:59,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-18 20:10:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:59,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-18 20:10:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:59,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-18 20:10:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:59,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:59,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824352644] [2022-11-18 20:10:59,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824352644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:10:59,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:10:59,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:10:59,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945466271] [2022-11-18 20:10:59,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:10:59,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:10:59,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:59,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:10:59,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:10:59,954 INFO L87 Difference]: Start difference. First operand 52477 states and 86319 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)