./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8 --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 4996a252ab084c920e1b9a19c3119ce328d4cb97d6d45029062c9dac50449e19 --- 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-e04fb08 [2022-11-16 11:09:00,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:09:00,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:09:00,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:09:00,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:09:00,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:09:00,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:09:00,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:09:00,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:09:00,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:09:00,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:09:00,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:09:00,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:09:00,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:09:00,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:09:00,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:09:00,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:09:00,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:09:00,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:09:00,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:09:00,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:09:00,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:09:00,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:09:00,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:09:00,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:09:00,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:09:00,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:09:00,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:09:00,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:09:00,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:09:00,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:09:00,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:09:00,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:09:00,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:09:00,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:09:00,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:09:00,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:09:00,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:09:00,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:09:00,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:09:00,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:09:00,410 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:09:00,434 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:09:00,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:09:00,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:09:00,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:09:00,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:09:00,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:09:00,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:09:00,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:09:00,436 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:09:00,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:09:00,437 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:09:00,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:09:00,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:09:00,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:09:00,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:09:00,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:09:00,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:09:00,438 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:09:00,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:09:00,439 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:09:00,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:09:00,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:09:00,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:09:00,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:09:00,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:09:00,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:09:00,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:09:00,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:09:00,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:09:00,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:09:00,441 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:09:00,441 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:09:00,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:09:00,442 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_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4996a252ab084c920e1b9a19c3119ce328d4cb97d6d45029062c9dac50449e19 [2022-11-16 11:09:00,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:09:00,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:09:00,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:09:00,763 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:09:00,764 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:09:00,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/systemc/token_ring.03.cil-2.c [2022-11-16 11:09:00,823 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/data/bef4bf024/8ce829cb61974d1680c1da53f1f2f143/FLAG2e97077c9 [2022-11-16 11:09:01,298 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:09:01,298 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/sv-benchmarks/c/systemc/token_ring.03.cil-2.c [2022-11-16 11:09:01,311 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/data/bef4bf024/8ce829cb61974d1680c1da53f1f2f143/FLAG2e97077c9 [2022-11-16 11:09:01,793 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/data/bef4bf024/8ce829cb61974d1680c1da53f1f2f143 [2022-11-16 11:09:01,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:09:01,802 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:09:01,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:09:01,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:09:01,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:09:01,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:09:01" (1/1) ... [2022-11-16 11:09:01,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@215f8168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:09:01, skipping insertion in model container [2022-11-16 11:09:01,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:09:01" (1/1) ... [2022-11-16 11:09:01,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:09:01,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:09:02,086 WARN L229 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_7c961394-45de-4fa1-a66f-dc845aaad585/sv-benchmarks/c/systemc/token_ring.03.cil-2.c[671,684] [2022-11-16 11:09:02,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:09:02,175 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:09:02,189 WARN L229 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_7c961394-45de-4fa1-a66f-dc845aaad585/sv-benchmarks/c/systemc/token_ring.03.cil-2.c[671,684] [2022-11-16 11:09:02,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:09:02,276 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:09:02,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:09:02 WrapperNode [2022-11-16 11:09:02,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:09:02,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:09:02,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:09:02,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:09:02,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:09:02" (1/1) ... [2022-11-16 11:09:02,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:09:02" (1/1) ... [2022-11-16 11:09:02,347 INFO L138 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 331 [2022-11-16 11:09:02,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:09:02,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:09:02,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:09:02,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:09:02,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:09:02" (1/1) ... [2022-11-16 11:09:02,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:09:02" (1/1) ... [2022-11-16 11:09:02,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:09:02" (1/1) ... [2022-11-16 11:09:02,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:09:02" (1/1) ... [2022-11-16 11:09:02,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:09:02" (1/1) ... [2022-11-16 11:09:02,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:09:02" (1/1) ... [2022-11-16 11:09:02,382 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:09:02" (1/1) ... [2022-11-16 11:09:02,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:09:02" (1/1) ... [2022-11-16 11:09:02,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:09:02,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:09:02,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:09:02,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:09:02,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:09:02" (1/1) ... [2022-11-16 11:09:02,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:09:02,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:02,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:09:02,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:09:02,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:09:02,477 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-16 11:09:02,478 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-16 11:09:02,478 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-16 11:09:02,478 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-16 11:09:02,478 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-16 11:09:02,478 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-16 11:09:02,478 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-16 11:09:02,478 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-16 11:09:02,479 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-16 11:09:02,479 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-16 11:09:02,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:09:02,479 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-16 11:09:02,479 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-16 11:09:02,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:09:02,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:09:02,565 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:09:02,567 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:09:03,004 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:09:03,014 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:09:03,014 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 11:09:03,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:09:03 BoogieIcfgContainer [2022-11-16 11:09:03,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:09:03,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:09:03,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:09:03,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:09:03,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:09:01" (1/3) ... [2022-11-16 11:09:03,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54484569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:09:03, skipping insertion in model container [2022-11-16 11:09:03,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:09:02" (2/3) ... [2022-11-16 11:09:03,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54484569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:09:03, skipping insertion in model container [2022-11-16 11:09:03,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:09:03" (3/3) ... [2022-11-16 11:09:03,026 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.03.cil-2.c [2022-11-16 11:09:03,045 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:09:03,045 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:09:03,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:09:03,160 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;@4dd2f36, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:09:03,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:09:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 132 states have (on average 1.5909090909090908) internal successors, (210), 134 states have internal predecessors, (210), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-16 11:09:03,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 11:09:03,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:03,209 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] [2022-11-16 11:09:03,210 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:03,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1701588439, now seen corresponding path program 1 times [2022-11-16 11:09:03,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:03,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715185594] [2022-11-16 11:09:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:03,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:03,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:09:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:03,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:09:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:03,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:09:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:03,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:09:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:03,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:09:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:03,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:03,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715185594] [2022-11-16 11:09:03,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715185594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:09:03,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:09:03,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:09:03,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045098450] [2022-11-16 11:09:03,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:03,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:09:03,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:03,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:09:03,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:09:03,742 INFO L87 Difference]: Start difference. First operand has 157 states, 132 states have (on average 1.5909090909090908) internal successors, (210), 134 states have internal predecessors, (210), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 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) [2022-11-16 11:09:04,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:04,663 INFO L93 Difference]: Finished difference Result 348 states and 549 transitions. [2022-11-16 11:09:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:09:04,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 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 78 [2022-11-16 11:09:04,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:04,677 INFO L225 Difference]: With dead ends: 348 [2022-11-16 11:09:04,678 INFO L226 Difference]: Without dead ends: 195 [2022-11-16 11:09:04,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:09:04,685 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 361 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:04,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 312 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:09:04,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-16 11:09:04,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 152. [2022-11-16 11:09:04,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 128 states have (on average 1.4921875) internal successors, (191), 129 states have internal predecessors, (191), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-16 11:09:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 225 transitions. [2022-11-16 11:09:04,769 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 225 transitions. Word has length 78 [2022-11-16 11:09:04,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:04,770 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 225 transitions. [2022-11-16 11:09:04,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 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) [2022-11-16 11:09:04,770 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 225 transitions. [2022-11-16 11:09:04,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 11:09:04,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:04,774 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] [2022-11-16 11:09:04,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:09:04,774 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:04,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:04,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1208962265, now seen corresponding path program 1 times [2022-11-16 11:09:04,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:04,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529931081] [2022-11-16 11:09:04,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:04,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:04,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:09:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:04,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:09:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:05,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:09:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:05,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:09:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:05,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:09:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:05,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:05,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529931081] [2022-11-16 11:09:05,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529931081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:09:05,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:09:05,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:09:05,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053931180] [2022-11-16 11:09:05,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:05,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:09:05,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:05,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:09:05,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:09:05,143 INFO L87 Difference]: Start difference. First operand 152 states and 225 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-11-16 11:09:06,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:06,235 INFO L93 Difference]: Finished difference Result 520 states and 792 transitions. [2022-11-16 11:09:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:09:06,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 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 78 [2022-11-16 11:09:06,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:06,245 INFO L225 Difference]: With dead ends: 520 [2022-11-16 11:09:06,245 INFO L226 Difference]: Without dead ends: 379 [2022-11-16 11:09:06,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:09:06,256 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 532 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:06,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 527 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:09:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-16 11:09:06,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 294. [2022-11-16 11:09:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 251 states have (on average 1.5059760956175299) internal successors, (378), 253 states have internal predecessors, (378), 29 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2022-11-16 11:09:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 439 transitions. [2022-11-16 11:09:06,338 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 439 transitions. Word has length 78 [2022-11-16 11:09:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:06,340 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 439 transitions. [2022-11-16 11:09:06,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-11-16 11:09:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 439 transitions. [2022-11-16 11:09:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 11:09:06,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:06,350 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] [2022-11-16 11:09:06,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:09:06,351 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:06,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:06,352 INFO L85 PathProgramCache]: Analyzing trace with hash -971914069, now seen corresponding path program 1 times [2022-11-16 11:09:06,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:06,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644071992] [2022-11-16 11:09:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:06,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:06,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:09:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:06,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:09:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:06,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:09:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:06,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:09:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:06,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:09:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:06,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:06,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644071992] [2022-11-16 11:09:06,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644071992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:09:06,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:09:06,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:09:06,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283718984] [2022-11-16 11:09:06,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:06,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:09:06,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:06,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:09:06,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:09:06,594 INFO L87 Difference]: Start difference. First operand 294 states and 439 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2022-11-16 11:09:08,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:08,056 INFO L93 Difference]: Finished difference Result 850 states and 1291 transitions. [2022-11-16 11:09:08,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:09:08,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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 78 [2022-11-16 11:09:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:08,063 INFO L225 Difference]: With dead ends: 850 [2022-11-16 11:09:08,063 INFO L226 Difference]: Without dead ends: 567 [2022-11-16 11:09:08,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:09:08,073 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 537 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:08,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 947 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:09:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-11-16 11:09:08,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 428. [2022-11-16 11:09:08,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 366 states have (on average 1.5) internal successors, (549), 369 states have internal predecessors, (549), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2022-11-16 11:09:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 636 transitions. [2022-11-16 11:09:08,162 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 636 transitions. Word has length 78 [2022-11-16 11:09:08,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:08,164 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 636 transitions. [2022-11-16 11:09:08,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2022-11-16 11:09:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 636 transitions. [2022-11-16 11:09:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 11:09:08,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:08,170 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] [2022-11-16 11:09:08,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:09:08,170 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:08,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1389310675, now seen corresponding path program 1 times [2022-11-16 11:09:08,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:08,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161939805] [2022-11-16 11:09:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:08,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:08,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:09:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:08,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:09:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:08,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:09:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:08,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:09:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:08,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:09:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:08,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:08,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161939805] [2022-11-16 11:09:08,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161939805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:09:08,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:09:08,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:09:08,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775536505] [2022-11-16 11:09:08,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:08,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:09:08,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:08,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:09:08,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:09:08,424 INFO L87 Difference]: Start difference. First operand 428 states and 636 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2022-11-16 11:09:09,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:09,769 INFO L93 Difference]: Finished difference Result 1333 states and 2016 transitions. [2022-11-16 11:09:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:09:09,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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 78 [2022-11-16 11:09:09,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:09,775 INFO L225 Difference]: With dead ends: 1333 [2022-11-16 11:09:09,775 INFO L226 Difference]: Without dead ends: 916 [2022-11-16 11:09:09,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:09:09,778 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 532 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:09,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 945 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:09:09,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-11-16 11:09:09,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 699. [2022-11-16 11:09:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 599 states have (on average 1.4958263772954925) internal successors, (896), 604 states have internal predecessors, (896), 65 states have call successors, (65), 30 states have call predecessors, (65), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2022-11-16 11:09:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1039 transitions. [2022-11-16 11:09:09,874 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1039 transitions. Word has length 78 [2022-11-16 11:09:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:09,874 INFO L495 AbstractCegarLoop]: Abstraction has 699 states and 1039 transitions. [2022-11-16 11:09:09,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2022-11-16 11:09:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1039 transitions. [2022-11-16 11:09:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 11:09:09,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:09,876 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] [2022-11-16 11:09:09,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:09:09,877 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:09,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:09,878 INFO L85 PathProgramCache]: Analyzing trace with hash -710038421, now seen corresponding path program 1 times [2022-11-16 11:09:09,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:09,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526190731] [2022-11-16 11:09:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:09,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:09,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:09:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:09,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:09:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:10,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:09:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:10,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:09:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:10,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:09:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:10,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:10,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526190731] [2022-11-16 11:09:10,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526190731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:09:10,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:09:10,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:09:10,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533402165] [2022-11-16 11:09:10,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:10,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:09:10,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:10,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:09:10,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:09:10,046 INFO L87 Difference]: Start difference. First operand 699 states and 1039 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2022-11-16 11:09:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:11,528 INFO L93 Difference]: Finished difference Result 2478 states and 3729 transitions. [2022-11-16 11:09:11,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:09:11,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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 78 [2022-11-16 11:09:11,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:11,538 INFO L225 Difference]: With dead ends: 2478 [2022-11-16 11:09:11,539 INFO L226 Difference]: Without dead ends: 1790 [2022-11-16 11:09:11,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:09:11,542 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 666 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:11,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 935 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:09:11,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2022-11-16 11:09:11,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1232. [2022-11-16 11:09:11,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1060 states have (on average 1.4962264150943396) internal successors, (1586), 1069 states have internal predecessors, (1586), 109 states have call successors, (109), 54 states have call predecessors, (109), 62 states have return successors, (144), 116 states have call predecessors, (144), 109 states have call successors, (144) [2022-11-16 11:09:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1839 transitions. [2022-11-16 11:09:11,676 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1839 transitions. Word has length 78 [2022-11-16 11:09:11,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:11,676 INFO L495 AbstractCegarLoop]: Abstraction has 1232 states and 1839 transitions. [2022-11-16 11:09:11,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2022-11-16 11:09:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1839 transitions. [2022-11-16 11:09:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 11:09:11,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:11,679 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] [2022-11-16 11:09:11,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:09:11,679 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:11,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:11,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1251536237, now seen corresponding path program 1 times [2022-11-16 11:09:11,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:11,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968326599] [2022-11-16 11:09:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:11,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:11,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:09:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:11,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:09:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:11,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:09:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:11,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:09:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:11,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:09:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:11,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:11,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968326599] [2022-11-16 11:09:11,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968326599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:09:11,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:09:11,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:09:11,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473022105] [2022-11-16 11:09:11,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:11,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:09:11,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:11,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:09:11,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:09:11,842 INFO L87 Difference]: Start difference. First operand 1232 states and 1839 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2022-11-16 11:09:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:13,487 INFO L93 Difference]: Finished difference Result 4433 states and 6675 transitions. [2022-11-16 11:09:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:09:13,488 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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 78 [2022-11-16 11:09:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:13,507 INFO L225 Difference]: With dead ends: 4433 [2022-11-16 11:09:13,508 INFO L226 Difference]: Without dead ends: 3212 [2022-11-16 11:09:13,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:09:13,514 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 552 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:13,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 931 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:09:13,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2022-11-16 11:09:13,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 2253. [2022-11-16 11:09:13,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 1941 states have (on average 1.4961360123647605) internal successors, (2904), 1958 states have internal predecessors, (2904), 193 states have call successors, (193), 102 states have call predecessors, (193), 118 states have return successors, (290), 208 states have call predecessors, (290), 193 states have call successors, (290) [2022-11-16 11:09:13,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 3387 transitions. [2022-11-16 11:09:13,748 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 3387 transitions. Word has length 78 [2022-11-16 11:09:13,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:13,749 INFO L495 AbstractCegarLoop]: Abstraction has 2253 states and 3387 transitions. [2022-11-16 11:09:13,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2022-11-16 11:09:13,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 3387 transitions. [2022-11-16 11:09:13,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 11:09:13,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:13,752 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] [2022-11-16 11:09:13,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:09:13,752 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:13,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1453360171, now seen corresponding path program 1 times [2022-11-16 11:09:13,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:13,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825926506] [2022-11-16 11:09:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:13,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:13,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:09:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:13,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:09:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:13,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:09:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:13,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:09:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:13,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:09:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:13,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:13,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825926506] [2022-11-16 11:09:13,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825926506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:09:13,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:09:13,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:09:13,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742893256] [2022-11-16 11:09:13,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:13,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:09:13,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:13,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:09:13,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:09:13,902 INFO L87 Difference]: Start difference. First operand 2253 states and 3387 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2022-11-16 11:09:15,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:15,603 INFO L93 Difference]: Finished difference Result 8076 states and 12205 transitions. [2022-11-16 11:09:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:09:15,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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 78 [2022-11-16 11:09:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:15,639 INFO L225 Difference]: With dead ends: 8076 [2022-11-16 11:09:15,643 INFO L226 Difference]: Without dead ends: 5834 [2022-11-16 11:09:15,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:09:15,654 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 615 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:15,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 624 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:09:15,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2022-11-16 11:09:16,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 4326. [2022-11-16 11:09:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 3742 states have (on average 1.4991982896846605) internal successors, (5610), 3775 states have internal predecessors, (5610), 353 states have call successors, (353), 198 states have call predecessors, (353), 230 states have return successors, (628), 384 states have call predecessors, (628), 353 states have call successors, (628) [2022-11-16 11:09:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 6591 transitions. [2022-11-16 11:09:16,107 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 6591 transitions. Word has length 78 [2022-11-16 11:09:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:16,107 INFO L495 AbstractCegarLoop]: Abstraction has 4326 states and 6591 transitions. [2022-11-16 11:09:16,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2022-11-16 11:09:16,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 6591 transitions. [2022-11-16 11:09:16,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 11:09:16,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:16,113 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] [2022-11-16 11:09:16,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:09:16,113 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:16,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:16,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2014059949, now seen corresponding path program 1 times [2022-11-16 11:09:16,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:16,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754654055] [2022-11-16 11:09:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:16,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:16,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:09:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:16,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:09:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:16,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:09:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:16,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:09:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:16,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:09:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:16,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:16,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754654055] [2022-11-16 11:09:16,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754654055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:09:16,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:09:16,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:09:16,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587425800] [2022-11-16 11:09:16,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:16,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:09:16,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:16,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:09:16,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:09:16,315 INFO L87 Difference]: Start difference. First operand 4326 states and 6591 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2022-11-16 11:09:18,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:18,507 INFO L93 Difference]: Finished difference Result 15135 states and 23151 transitions. [2022-11-16 11:09:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:09:18,508 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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 78 [2022-11-16 11:09:18,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:18,578 INFO L225 Difference]: With dead ends: 15135 [2022-11-16 11:09:18,578 INFO L226 Difference]: Without dead ends: 10820 [2022-11-16 11:09:18,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:09:18,595 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 543 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:18,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 913 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:09:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10820 states. [2022-11-16 11:09:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10820 to 8443. [2022-11-16 11:09:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8443 states, 7339 states have (on average 1.5032020711268566) internal successors, (11032), 7404 states have internal predecessors, (11032), 653 states have call successors, (653), 386 states have call predecessors, (653), 450 states have return successors, (1446), 716 states have call predecessors, (1446), 653 states have call successors, (1446) [2022-11-16 11:09:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8443 states to 8443 states and 13131 transitions. [2022-11-16 11:09:19,629 INFO L78 Accepts]: Start accepts. Automaton has 8443 states and 13131 transitions. Word has length 78 [2022-11-16 11:09:19,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:19,630 INFO L495 AbstractCegarLoop]: Abstraction has 8443 states and 13131 transitions. [2022-11-16 11:09:19,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 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) [2022-11-16 11:09:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 8443 states and 13131 transitions. [2022-11-16 11:09:19,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 11:09:19,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:19,639 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] [2022-11-16 11:09:19,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:09:19,639 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:19,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:19,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1847178261, now seen corresponding path program 1 times [2022-11-16 11:09:19,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:19,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739299484] [2022-11-16 11:09:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:19,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:19,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:09:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:19,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:09:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:19,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:09:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:19,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:09:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:19,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:09:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:19,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:19,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739299484] [2022-11-16 11:09:19,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739299484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:09:19,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:09:19,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:09:19,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693921525] [2022-11-16 11:09:19,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:19,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:09:19,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:19,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:09:19,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:09:19,737 INFO L87 Difference]: Start difference. First operand 8443 states and 13131 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-11-16 11:09:22,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:22,527 INFO L93 Difference]: Finished difference Result 23912 states and 36955 transitions. [2022-11-16 11:09:22,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:09:22,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 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 78 [2022-11-16 11:09:22,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:22,604 INFO L225 Difference]: With dead ends: 23912 [2022-11-16 11:09:22,605 INFO L226 Difference]: Without dead ends: 15481 [2022-11-16 11:09:22,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:09:22,641 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 692 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:22,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 706 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:09:22,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15481 states. [2022-11-16 11:09:24,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15481 to 12662. [2022-11-16 11:09:24,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12662 states, 10979 states have (on average 1.489024501320703) internal successors, (16348), 11109 states have internal predecessors, (16348), 1002 states have call successors, (1002), 584 states have call predecessors, (1002), 680 states have return successors, (2039), 1032 states have call predecessors, (2039), 1002 states have call successors, (2039) [2022-11-16 11:09:24,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12662 states to 12662 states and 19389 transitions. [2022-11-16 11:09:24,091 INFO L78 Accepts]: Start accepts. Automaton has 12662 states and 19389 transitions. Word has length 78 [2022-11-16 11:09:24,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:24,091 INFO L495 AbstractCegarLoop]: Abstraction has 12662 states and 19389 transitions. [2022-11-16 11:09:24,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-11-16 11:09:24,092 INFO L276 IsEmpty]: Start isEmpty. Operand 12662 states and 19389 transitions. [2022-11-16 11:09:24,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-16 11:09:24,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:24,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:24,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:09:24,140 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:24,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:24,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2119452571, now seen corresponding path program 1 times [2022-11-16 11:09:24,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:24,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132534458] [2022-11-16 11:09:24,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:24,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:24,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:09:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:24,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:09:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:24,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:09:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:24,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:09:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:24,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:09:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:24,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-16 11:09:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:24,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:09:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:24,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-16 11:09:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:09:24,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:24,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132534458] [2022-11-16 11:09:24,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132534458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:24,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454310911] [2022-11-16 11:09:24,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:24,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:24,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:24,389 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:24,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:09:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:24,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:09:24,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:09:24,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:09:24,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454310911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:09:24,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:09:24,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-16 11:09:24,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575002044] [2022-11-16 11:09:24,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:24,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:09:24,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:24,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:09:24,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:09:24,660 INFO L87 Difference]: Start difference. First operand 12662 states and 19389 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 11:09:26,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:26,801 INFO L93 Difference]: Finished difference Result 37603 states and 57917 transitions. [2022-11-16 11:09:26,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:09:26,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 127 [2022-11-16 11:09:26,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:26,922 INFO L225 Difference]: With dead ends: 37603 [2022-11-16 11:09:26,923 INFO L226 Difference]: Without dead ends: 24953 [2022-11-16 11:09:26,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:09:26,973 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 178 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:26,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 467 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:09:27,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24953 states. [2022-11-16 11:09:29,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24953 to 24755. [2022-11-16 11:09:29,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24755 states, 21452 states have (on average 1.4867145254521723) internal successors, (31893), 21711 states have internal predecessors, (31893), 1946 states have call successors, (1946), 1164 states have call predecessors, (1946), 1356 states have return successors, (3957), 1943 states have call predecessors, (3957), 1946 states have call successors, (3957) [2022-11-16 11:09:29,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24755 states to 24755 states and 37796 transitions. [2022-11-16 11:09:29,222 INFO L78 Accepts]: Start accepts. Automaton has 24755 states and 37796 transitions. Word has length 127 [2022-11-16 11:09:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:29,225 INFO L495 AbstractCegarLoop]: Abstraction has 24755 states and 37796 transitions. [2022-11-16 11:09:29,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 11:09:29,225 INFO L276 IsEmpty]: Start isEmpty. Operand 24755 states and 37796 transitions. [2022-11-16 11:09:29,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-16 11:09:29,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:29,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:29,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:29,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:09:29,487 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:29,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:29,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1105450171, now seen corresponding path program 1 times [2022-11-16 11:09:29,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:29,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94372737] [2022-11-16 11:09:29,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:29,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:29,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:09:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:29,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:09:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:29,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:09:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:29,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:09:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:29,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:09:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:29,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-16 11:09:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:29,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:09:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:29,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-16 11:09:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:09:29,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:29,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94372737] [2022-11-16 11:09:29,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94372737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:29,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462609750] [2022-11-16 11:09:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:29,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:29,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:29,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:29,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:09:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:29,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:09:29,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:09:29,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:09:29,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462609750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:09:29,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:09:29,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-16 11:09:29,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229479073] [2022-11-16 11:09:29,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:29,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:09:29,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:29,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:09:29,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:09:29,916 INFO L87 Difference]: Start difference. First operand 24755 states and 37796 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 11:09:33,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:33,296 INFO L93 Difference]: Finished difference Result 73512 states and 112918 transitions. [2022-11-16 11:09:33,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:09:33,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 127 [2022-11-16 11:09:33,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:33,488 INFO L225 Difference]: With dead ends: 73512 [2022-11-16 11:09:33,489 INFO L226 Difference]: Without dead ends: 48769 [2022-11-16 11:09:33,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:09:33,554 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 172 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:33,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 432 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:09:33,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48769 states. [2022-11-16 11:09:37,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48769 to 48375. [2022-11-16 11:09:37,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48375 states, 41898 states have (on average 1.4842951930879755) internal successors, (62189), 42415 states have internal predecessors, (62189), 3776 states have call successors, (3776), 2316 states have call predecessors, (3776), 2700 states have return successors, (7735), 3707 states have call predecessors, (7735), 3776 states have call successors, (7735) [2022-11-16 11:09:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48375 states to 48375 states and 73700 transitions. [2022-11-16 11:09:37,474 INFO L78 Accepts]: Start accepts. Automaton has 48375 states and 73700 transitions. Word has length 127 [2022-11-16 11:09:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:37,474 INFO L495 AbstractCegarLoop]: Abstraction has 48375 states and 73700 transitions. [2022-11-16 11:09:37,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 11:09:37,475 INFO L276 IsEmpty]: Start isEmpty. Operand 48375 states and 73700 transitions. [2022-11-16 11:09:37,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-16 11:09:37,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:37,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:37,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 11:09:37,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:09:37,758 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:37,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:37,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1762936357, now seen corresponding path program 1 times [2022-11-16 11:09:37,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:37,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713095104] [2022-11-16 11:09:37,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:37,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:37,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:09:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:37,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:09:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:37,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:09:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:37,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:09:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:37,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:09:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:37,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-16 11:09:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:37,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:09:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:37,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-16 11:09:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:09:37,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:37,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713095104] [2022-11-16 11:09:37,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713095104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:37,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612792477] [2022-11-16 11:09:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:37,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:37,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:37,948 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:37,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:09:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:38,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:09:38,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 11:09:38,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:09:38,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612792477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:09:38,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:09:38,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-16 11:09:38,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345276707] [2022-11-16 11:09:38,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:38,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:09:38,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:38,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:09:38,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:09:38,105 INFO L87 Difference]: Start difference. First operand 48375 states and 73700 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 11:09:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:44,857 INFO L93 Difference]: Finished difference Result 142912 states and 220157 transitions. [2022-11-16 11:09:44,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:09:44,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 127 [2022-11-16 11:09:44,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:45,347 INFO L225 Difference]: With dead ends: 142912 [2022-11-16 11:09:45,347 INFO L226 Difference]: Without dead ends: 94550 [2022-11-16 11:09:45,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:09:45,507 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 193 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:45,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 642 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:09:45,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94550 states. [2022-11-16 11:09:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94550 to 94550. [2022-11-16 11:09:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94550 states, 82006 states have (on average 1.4772943443162696) internal successors, (121147), 82908 states have internal predecessors, (121147), 7215 states have call successors, (7215), 4560 states have call predecessors, (7215), 5328 states have return successors, (16218), 7209 states have call predecessors, (16218), 7215 states have call successors, (16218) [2022-11-16 11:09:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94550 states to 94550 states and 144580 transitions. [2022-11-16 11:09:53,542 INFO L78 Accepts]: Start accepts. Automaton has 94550 states and 144580 transitions. Word has length 127 [2022-11-16 11:09:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:53,543 INFO L495 AbstractCegarLoop]: Abstraction has 94550 states and 144580 transitions. [2022-11-16 11:09:53,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 11:09:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand 94550 states and 144580 transitions. [2022-11-16 11:09:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-16 11:09:53,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:53,801 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:53,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:54,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:09:54,006 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:54,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:54,007 INFO L85 PathProgramCache]: Analyzing trace with hash -915733099, now seen corresponding path program 1 times [2022-11-16 11:09:54,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:54,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096351615] [2022-11-16 11:09:54,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:54,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:54,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-16 11:09:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:54,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:09:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:54,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-16 11:09:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:54,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 11:09:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:54,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-16 11:09:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:54,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-16 11:09:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:54,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:09:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:54,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-16 11:09:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:54,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:09:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:54,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-11-16 11:09:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 11:09:54,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:54,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096351615] [2022-11-16 11:09:54,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096351615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:54,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688872314] [2022-11-16 11:09:54,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:54,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:54,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:54,219 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:54,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c961394-45de-4fa1-a66f-dc845aaad585/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:09:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:54,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:09:54,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 11:09:54,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:09:54,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688872314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:09:54,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:09:54,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-16 11:09:54,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382726773] [2022-11-16 11:09:54,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:54,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:09:54,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:54,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:09:54,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:09:54,563 INFO L87 Difference]: Start difference. First operand 94550 states and 144580 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)