./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.2.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/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_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.2.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/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 64bit --witnessprinter.graph.data.programhash 0171e0f1a94d5353269e6507af13927fca1babd620f07d4566855bc7bc2af89b --- 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 11:55:49,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:55:49,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:55:49,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:55:49,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:55:49,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:55:49,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:55:49,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:55:49,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:55:49,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:55:49,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:55:49,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:55:49,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:55:49,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:55:49,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:55:49,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:55:49,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:55:49,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:55:49,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:55:49,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:55:49,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:55:49,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:55:49,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:55:49,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:55:49,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:55:49,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:55:49,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:55:49,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:55:49,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:55:49,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:55:49,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:55:49,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:55:49,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:55:49,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:55:49,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:55:49,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:55:49,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:55:49,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:55:49,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:55:49,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:55:49,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:55:49,410 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 11:55:49,450 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:55:49,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:55:49,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:55:49,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:55:49,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:55:49,459 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:55:49,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:55:49,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:55:49,460 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:55:49,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:55:49,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:55:49,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:55:49,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:55:49,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:55:49,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:55:49,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:55:49,463 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:55:49,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:55:49,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:55:49,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:55:49,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:55:49,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:55:49,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:55:49,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:55:49,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:55:49,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:55:49,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:55:49,468 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:55:49,468 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:55:49,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:55:49,468 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_2d1b8ae9-8b40-451c-83f8-e79550f51e95/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0171e0f1a94d5353269e6507af13927fca1babd620f07d4566855bc7bc2af89b [2022-11-16 11:55:49,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:55:49,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:55:49,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:55:49,849 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:55:49,850 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:55:49,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.2.prop1-back-serstep.c [2022-11-16 11:55:49,943 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/data/478eb5d30/d2c8c6673b8c4a73b63fa88d85bc0a46/FLAG70f94098e [2022-11-16 11:55:50,762 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:55:50,762 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.2.prop1-back-serstep.c [2022-11-16 11:55:50,779 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/data/478eb5d30/d2c8c6673b8c4a73b63fa88d85bc0a46/FLAG70f94098e [2022-11-16 11:55:50,873 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/data/478eb5d30/d2c8c6673b8c4a73b63fa88d85bc0a46 [2022-11-16 11:55:50,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:55:50,878 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:55:50,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:55:50,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:55:50,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:55:50,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:55:50" (1/1) ... [2022-11-16 11:55:50,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4782380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:50, skipping insertion in model container [2022-11-16 11:55:50,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:55:50" (1/1) ... [2022-11-16 11:55:50,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:55:50,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:55:51,273 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_2d1b8ae9-8b40-451c-83f8-e79550f51e95/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.2.prop1-back-serstep.c[1014,1027] [2022-11-16 11:55:51,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:55:51,801 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:55:51,814 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_2d1b8ae9-8b40-451c-83f8-e79550f51e95/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.2.prop1-back-serstep.c[1014,1027] [2022-11-16 11:55:52,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:55:52,053 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:55:52,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:52 WrapperNode [2022-11-16 11:55:52,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:55:52,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:55:52,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:55:52,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:55:52,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:52" (1/1) ... [2022-11-16 11:55:52,145 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:52" (1/1) ... [2022-11-16 11:55:52,364 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3471 [2022-11-16 11:55:52,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:55:52,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:55:52,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:55:52,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:55:52,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:52" (1/1) ... [2022-11-16 11:55:52,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:52" (1/1) ... [2022-11-16 11:55:52,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:52" (1/1) ... [2022-11-16 11:55:52,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:52" (1/1) ... [2022-11-16 11:55:52,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:52" (1/1) ... [2022-11-16 11:55:52,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:52" (1/1) ... [2022-11-16 11:55:52,513 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:52" (1/1) ... [2022-11-16 11:55:52,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:52" (1/1) ... [2022-11-16 11:55:52,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:55:52,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:55:52,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:55:52,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:55:52,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:52" (1/1) ... [2022-11-16 11:55:52,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:55:52,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:55:52,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:55:52,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:55:52,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:55:52,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:55:53,435 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:55:53,438 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:55:58,347 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:55:58,371 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:55:58,371 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:55:58,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:55:58 BoogieIcfgContainer [2022-11-16 11:55:58,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:55:58,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:55:58,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:55:58,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:55:58,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:55:50" (1/3) ... [2022-11-16 11:55:58,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a208e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:55:58, skipping insertion in model container [2022-11-16 11:55:58,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:52" (2/3) ... [2022-11-16 11:55:58,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a208e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:55:58, skipping insertion in model container [2022-11-16 11:55:58,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:55:58" (3/3) ... [2022-11-16 11:55:58,390 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.resistance.2.prop1-back-serstep.c [2022-11-16 11:55:58,414 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:55:58,414 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:55:58,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:55:58,553 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;@576775f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:55:58,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:55:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 584 states, 582 states have (on average 1.6632302405498283) internal successors, (968), 583 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:58,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-16 11:55:58,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:58,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:58,592 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:58,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:58,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1950332215, now seen corresponding path program 1 times [2022-11-16 11:55:58,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:58,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408697658] [2022-11-16 11:55:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:58,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:59,811 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 11:55:59,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:59,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408697658] [2022-11-16 11:55:59,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408697658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:59,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:59,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:55:59,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849877393] [2022-11-16 11:55:59,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:59,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:55:59,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:59,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:55:59,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:55:59,869 INFO L87 Difference]: Start difference. First operand has 584 states, 582 states have (on average 1.6632302405498283) internal successors, (968), 583 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:00,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:00,207 INFO L93 Difference]: Finished difference Result 1930 states and 3212 transitions. [2022-11-16 11:56:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:56:00,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-11-16 11:56:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:00,232 INFO L225 Difference]: With dead ends: 1930 [2022-11-16 11:56:00,245 INFO L226 Difference]: Without dead ends: 1348 [2022-11-16 11:56:00,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:56:00,257 INFO L413 NwaCegarLoop]: 1280 mSDtfsCounter, 2862 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2862 SdHoareTripleChecker+Valid, 2873 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:00,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2862 Valid, 2873 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:56:00,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2022-11-16 11:56:00,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 582. [2022-11-16 11:56:00,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.6592082616179002) internal successors, (964), 581 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:00,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 964 transitions. [2022-11-16 11:56:00,357 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 964 transitions. Word has length 133 [2022-11-16 11:56:00,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:00,358 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 964 transitions. [2022-11-16 11:56:00,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:00,359 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 964 transitions. [2022-11-16 11:56:00,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-16 11:56:00,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:00,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:00,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:56:00,362 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:00,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:00,363 INFO L85 PathProgramCache]: Analyzing trace with hash -329030805, now seen corresponding path program 1 times [2022-11-16 11:56:00,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:00,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961780528] [2022-11-16 11:56:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:00,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:01,325 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 11:56:01,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:01,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961780528] [2022-11-16 11:56:01,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961780528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:01,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:01,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:56:01,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190378453] [2022-11-16 11:56:01,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:01,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:56:01,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:01,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:56:01,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:56:01,337 INFO L87 Difference]: Start difference. First operand 582 states and 964 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:01,871 INFO L93 Difference]: Finished difference Result 2309 states and 3834 transitions. [2022-11-16 11:56:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:56:01,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-16 11:56:01,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:01,891 INFO L225 Difference]: With dead ends: 2309 [2022-11-16 11:56:01,893 INFO L226 Difference]: Without dead ends: 1729 [2022-11-16 11:56:01,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:56:01,901 INFO L413 NwaCegarLoop]: 1274 mSDtfsCounter, 2419 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2419 SdHoareTripleChecker+Valid, 3186 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:01,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2419 Valid, 3186 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:56:01,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2022-11-16 11:56:01,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 773. [2022-11-16 11:56:01,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.6593264248704662) internal successors, (1281), 772 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1281 transitions. [2022-11-16 11:56:01,964 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1281 transitions. Word has length 134 [2022-11-16 11:56:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:01,967 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 1281 transitions. [2022-11-16 11:56:01,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:01,969 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1281 transitions. [2022-11-16 11:56:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-11-16 11:56:01,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:01,994 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:56:01,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:56:01,995 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:02,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:02,008 INFO L85 PathProgramCache]: Analyzing trace with hash -569034840, now seen corresponding path program 1 times [2022-11-16 11:56:02,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:02,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701749178] [2022-11-16 11:56:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:02,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:31,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:31,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701749178] [2022-11-16 11:56:31,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701749178] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:31,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036416245] [2022-11-16 11:56:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:31,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:31,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:31,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:31,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:56:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:33,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 4276 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 11:56:33,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:43,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:51,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036416245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:51,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:51,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-11-16 11:56:51,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080800022] [2022-11-16 11:56:51,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:51,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:56:51,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:51,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:56:51,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:56:51,778 INFO L87 Difference]: Start difference. First operand 773 states and 1281 transitions. Second operand has 21 states, 21 states have (on average 73.76190476190476) internal successors, (1549), 21 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:06,043 INFO L93 Difference]: Finished difference Result 4059 states and 6679 transitions. [2022-11-16 11:57:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:57:06,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 73.76190476190476) internal successors, (1549), 21 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 519 [2022-11-16 11:57:06,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:06,060 INFO L225 Difference]: With dead ends: 4059 [2022-11-16 11:57:06,060 INFO L226 Difference]: Without dead ends: 3479 [2022-11-16 11:57:06,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1060 GetRequests, 1024 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=433, Invalid=973, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:57:06,064 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 13739 mSDsluCounter, 4610 mSDsCounter, 0 mSdLazyCounter, 11614 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13739 SdHoareTripleChecker+Valid, 4895 SdHoareTripleChecker+Invalid, 11809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 11614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:06,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13739 Valid, 4895 Invalid, 11809 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [195 Valid, 11614 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2022-11-16 11:57:06,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2022-11-16 11:57:06,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 1350. [2022-11-16 11:57:06,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.659747961452928) internal successors, (2239), 1349 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:06,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2239 transitions. [2022-11-16 11:57:06,135 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2239 transitions. Word has length 519 [2022-11-16 11:57:06,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:06,137 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 2239 transitions. [2022-11-16 11:57:06,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 73.76190476190476) internal successors, (1549), 21 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:06,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2239 transitions. [2022-11-16 11:57:06,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-11-16 11:57:06,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:06,153 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:06,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:06,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:06,375 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:06,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:06,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1015232258, now seen corresponding path program 1 times [2022-11-16 11:57:06,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:06,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129961624] [2022-11-16 11:57:06,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:06,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:13,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:13,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129961624] [2022-11-16 11:57:13,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129961624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:13,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:13,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:57:13,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926956948] [2022-11-16 11:57:13,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:13,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:57:13,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:13,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:57:13,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:13,107 INFO L87 Difference]: Start difference. First operand 1350 states and 2239 transitions. Second operand has 4 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:13,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:13,800 INFO L93 Difference]: Finished difference Result 2124 states and 3522 transitions. [2022-11-16 11:57:13,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:57:13,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 521 [2022-11-16 11:57:13,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:13,808 INFO L225 Difference]: With dead ends: 2124 [2022-11-16 11:57:13,808 INFO L226 Difference]: Without dead ends: 1350 [2022-11-16 11:57:13,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:57:13,810 INFO L413 NwaCegarLoop]: 883 mSDtfsCounter, 579 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:13,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1766 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:57:13,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2022-11-16 11:57:13,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1350. [2022-11-16 11:57:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.6582653817642699) internal successors, (2237), 1349 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2237 transitions. [2022-11-16 11:57:13,853 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2237 transitions. Word has length 521 [2022-11-16 11:57:13,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:13,854 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 2237 transitions. [2022-11-16 11:57:13,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2237 transitions. [2022-11-16 11:57:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-11-16 11:57:13,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:13,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:13,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:57:13,871 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:13,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:13,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1084880132, now seen corresponding path program 1 times [2022-11-16 11:57:13,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:13,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933015788] [2022-11-16 11:57:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:13,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-16 11:57:43,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:43,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933015788] [2022-11-16 11:57:43,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933015788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:43,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:43,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:57:43,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777073628] [2022-11-16 11:57:43,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:43,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:57:43,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:43,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:57:43,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:43,815 INFO L87 Difference]: Start difference. First operand 1350 states and 2237 transitions. Second operand has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:44,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:44,017 INFO L93 Difference]: Finished difference Result 3653 states and 6056 transitions. [2022-11-16 11:57:44,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:57:44,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 521 [2022-11-16 11:57:44,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:44,029 INFO L225 Difference]: With dead ends: 3653 [2022-11-16 11:57:44,029 INFO L226 Difference]: Without dead ends: 3073 [2022-11-16 11:57:44,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:57:44,032 INFO L413 NwaCegarLoop]: 1273 mSDtfsCounter, 2849 mSDsluCounter, 2217 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2849 SdHoareTripleChecker+Valid, 3490 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:44,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2849 Valid, 3490 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:57:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2022-11-16 11:57:44,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 1350. [2022-11-16 11:57:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.6582653817642699) internal successors, (2237), 1349 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:44,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2237 transitions. [2022-11-16 11:57:44,080 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2237 transitions. Word has length 521 [2022-11-16 11:57:44,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:44,082 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 2237 transitions. [2022-11-16 11:57:44,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:44,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2237 transitions. [2022-11-16 11:57:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-11-16 11:57:44,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:44,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:44,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:57:44,100 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:44,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:44,102 INFO L85 PathProgramCache]: Analyzing trace with hash -938885974, now seen corresponding path program 1 times [2022-11-16 11:57:44,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:44,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898798902] [2022-11-16 11:57:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:44,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:15,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:15,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898798902] [2022-11-16 11:58:15,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898798902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:58:15,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497229754] [2022-11-16 11:58:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:15,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:15,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:15,435 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:15,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:58:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:17,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 4285 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 11:58:17,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-16 11:58:19,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:58:19,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497229754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:58:19,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:58:19,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-16 11:58:19,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414682809] [2022-11-16 11:58:19,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:58:19,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:58:19,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:19,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:58:19,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:58:19,159 INFO L87 Difference]: Start difference. First operand 1350 states and 2237 transitions. Second operand has 7 states, 7 states have (on average 57.0) internal successors, (399), 7 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:23,581 INFO L93 Difference]: Finished difference Result 3679 states and 6093 transitions. [2022-11-16 11:58:23,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:58:23,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 57.0) internal successors, (399), 7 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 522 [2022-11-16 11:58:23,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:23,595 INFO L225 Difference]: With dead ends: 3679 [2022-11-16 11:58:23,595 INFO L226 Difference]: Without dead ends: 3097 [2022-11-16 11:58:23,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:58:23,599 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 6293 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 4142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6293 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 4144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:23,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6293 Valid, 1616 Invalid, 4144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4142 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-16 11:58:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2022-11-16 11:58:23,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 1350. [2022-11-16 11:58:23,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.6582653817642699) internal successors, (2237), 1349 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2237 transitions. [2022-11-16 11:58:23,650 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2237 transitions. Word has length 522 [2022-11-16 11:58:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:23,651 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 2237 transitions. [2022-11-16 11:58:23,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.0) internal successors, (399), 7 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:23,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2237 transitions. [2022-11-16 11:58:23,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2022-11-16 11:58:23,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:23,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:58:23,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:23,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:23,884 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:58:23,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:23,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2128780888, now seen corresponding path program 1 times [2022-11-16 11:58:23,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:23,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427326276] [2022-11-16 11:58:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:23,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:53,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:53,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427326276] [2022-11-16 11:58:53,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427326276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:58:53,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628456440] [2022-11-16 11:58:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:53,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:53,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:53,794 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:53,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:58:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:55,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 4288 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 11:58:55,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-16 11:58:57,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:58:57,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628456440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:58:57,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:58:57,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-11-16 11:58:57,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098798349] [2022-11-16 11:58:57,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:58:57,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:58:57,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:57,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:58:57,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:58:57,563 INFO L87 Difference]: Start difference. First operand 1350 states and 2237 transitions. Second operand has 8 states, 8 states have (on average 50.25) internal successors, (402), 8 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:02,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:02,163 INFO L93 Difference]: Finished difference Result 3706 states and 6138 transitions. [2022-11-16 11:59:02,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:59:02,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 50.25) internal successors, (402), 8 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 523 [2022-11-16 11:59:02,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:02,177 INFO L225 Difference]: With dead ends: 3706 [2022-11-16 11:59:02,178 INFO L226 Difference]: Without dead ends: 3121 [2022-11-16 11:59:02,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:59:02,181 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 7276 mSDsluCounter, 1608 mSDsCounter, 0 mSdLazyCounter, 5073 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7276 SdHoareTripleChecker+Valid, 1961 SdHoareTripleChecker+Invalid, 5075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:02,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7276 Valid, 1961 Invalid, 5075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5073 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-16 11:59:02,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2022-11-16 11:59:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 1350. [2022-11-16 11:59:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.6582653817642699) internal successors, (2237), 1349 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2237 transitions. [2022-11-16 11:59:02,230 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2237 transitions. Word has length 523 [2022-11-16 11:59:02,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:02,231 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 2237 transitions. [2022-11-16 11:59:02,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 50.25) internal successors, (402), 8 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:02,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2237 transitions. [2022-11-16 11:59:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2022-11-16 11:59:02,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:02,237 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:59:02,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:02,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:02,463 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:02,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:02,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1149978750, now seen corresponding path program 1 times [2022-11-16 11:59:02,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:02,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033427129] [2022-11-16 11:59:02,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:02,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:33,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:33,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033427129] [2022-11-16 11:59:33,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033427129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:59:33,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940732040] [2022-11-16 11:59:33,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:33,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:33,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:33,351 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:33,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:59:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:35,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 4291 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:59:35,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:37,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:59:37,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940732040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:59:37,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:59:37,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-16 11:59:37,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43925206] [2022-11-16 11:59:37,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:59:37,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:59:37,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:37,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:59:37,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:59:37,226 INFO L87 Difference]: Start difference. First operand 1350 states and 2237 transitions. Second operand has 7 states, 7 states have (on average 74.85714285714286) internal successors, (524), 7 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:40,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:40,203 INFO L93 Difference]: Finished difference Result 5725 states and 9493 transitions. [2022-11-16 11:59:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:59:40,206 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 74.85714285714286) internal successors, (524), 7 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 524 [2022-11-16 11:59:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:40,225 INFO L225 Difference]: With dead ends: 5725 [2022-11-16 11:59:40,225 INFO L226 Difference]: Without dead ends: 4950 [2022-11-16 11:59:40,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:59:40,229 INFO L413 NwaCegarLoop]: 1889 mSDtfsCounter, 5528 mSDsluCounter, 6530 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5528 SdHoareTripleChecker+Valid, 8419 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:40,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5528 Valid, 8419 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-16 11:59:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4950 states. [2022-11-16 11:59:40,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4950 to 2639. [2022-11-16 11:59:40,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 2638 states have (on average 1.6592115238817287) internal successors, (4377), 2638 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:40,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 4377 transitions. [2022-11-16 11:59:40,318 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 4377 transitions. Word has length 524 [2022-11-16 11:59:40,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:40,320 INFO L495 AbstractCegarLoop]: Abstraction has 2639 states and 4377 transitions. [2022-11-16 11:59:40,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.85714285714286) internal successors, (524), 7 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 4377 transitions. [2022-11-16 11:59:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2022-11-16 11:59:40,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:40,328 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:59:40,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:40,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:40,541 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:40,542 INFO L85 PathProgramCache]: Analyzing trace with hash -339734882, now seen corresponding path program 1 times [2022-11-16 11:59:40,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:40,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353332411] [2022-11-16 11:59:40,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:40,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-16 11:59:55,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353332411] [2022-11-16 11:59:55,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353332411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:59:55,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:59:55,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:59:55,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377648616] [2022-11-16 11:59:55,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:59:55,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:59:55,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:55,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:59:55,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:59:55,243 INFO L87 Difference]: Start difference. First operand 2639 states and 4377 transitions. Second operand has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:55,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:55,568 INFO L93 Difference]: Finished difference Result 7305 states and 12111 transitions. [2022-11-16 11:59:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:59:55,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 525 [2022-11-16 11:59:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:55,592 INFO L225 Difference]: With dead ends: 7305 [2022-11-16 11:59:55,593 INFO L226 Difference]: Without dead ends: 6151 [2022-11-16 11:59:55,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:59:55,597 INFO L413 NwaCegarLoop]: 1267 mSDtfsCounter, 5743 mSDsluCounter, 6021 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5743 SdHoareTripleChecker+Valid, 7288 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:55,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5743 Valid, 7288 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:59:55,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2022-11-16 11:59:55,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 2639. [2022-11-16 11:59:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 2638 states have (on average 1.6592115238817287) internal successors, (4377), 2638 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 4377 transitions. [2022-11-16 11:59:55,701 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 4377 transitions. Word has length 525 [2022-11-16 11:59:55,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:55,702 INFO L495 AbstractCegarLoop]: Abstraction has 2639 states and 4377 transitions. [2022-11-16 11:59:55,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:55,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 4377 transitions. [2022-11-16 11:59:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2022-11-16 11:59:55,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:55,710 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:59:55,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:59:55,711 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:55,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:55,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1785337230, now seen corresponding path program 1 times [2022-11-16 11:59:55,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:55,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592470585] [2022-11-16 11:59:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:55,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:31,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:31,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592470585] [2022-11-16 12:00:31,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592470585] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:31,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695627109] [2022-11-16 12:00:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:31,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:31,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:31,405 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:31,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:00:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:33,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 4297 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 12:00:33,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-16 12:00:35,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:00:35,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695627109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:35,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:00:35,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2022-11-16 12:00:35,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965430482] [2022-11-16 12:00:35,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:35,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:00:35,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:35,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:00:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:00:35,214 INFO L87 Difference]: Start difference. First operand 2639 states and 4377 transitions. Second operand has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:41,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:41,091 INFO L93 Difference]: Finished difference Result 7375 states and 12223 transitions. [2022-11-16 12:00:41,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:00:41,092 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 526 [2022-11-16 12:00:41,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:41,105 INFO L225 Difference]: With dead ends: 7375 [2022-11-16 12:00:41,106 INFO L226 Difference]: Without dead ends: 6215 [2022-11-16 12:00:41,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:00:41,111 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 9234 mSDsluCounter, 2302 mSDsCounter, 0 mSdLazyCounter, 6941 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9234 SdHoareTripleChecker+Valid, 2651 SdHoareTripleChecker+Invalid, 6943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:41,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9234 Valid, 2651 Invalid, 6943 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 6941 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-16 12:00:41,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6215 states. [2022-11-16 12:00:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6215 to 2639. [2022-11-16 12:00:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 2638 states have (on average 1.6592115238817287) internal successors, (4377), 2638 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 4377 transitions. [2022-11-16 12:00:41,194 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 4377 transitions. Word has length 526 [2022-11-16 12:00:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:41,195 INFO L495 AbstractCegarLoop]: Abstraction has 2639 states and 4377 transitions. [2022-11-16 12:00:41,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 41.0) internal successors, (410), 10 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 4377 transitions. [2022-11-16 12:00:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-16 12:00:41,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:41,203 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:00:41,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:41,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:00:41,428 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:41,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:41,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1424682552, now seen corresponding path program 1 times [2022-11-16 12:00:41,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:41,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505041489] [2022-11-16 12:00:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:41,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:17,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:17,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505041489] [2022-11-16 12:01:17,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505041489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:01:17,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368974533] [2022-11-16 12:01:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:17,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:17,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:17,839 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:17,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:01:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:20,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 4300 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 12:01:20,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-16 12:01:21,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:01:21,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368974533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:01:21,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:01:21,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2022-11-16 12:01:21,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213950356] [2022-11-16 12:01:21,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:01:21,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:01:21,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:21,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:01:21,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:01:21,542 INFO L87 Difference]: Start difference. First operand 2639 states and 4377 transitions. Second operand has 11 states, 11 states have (on average 37.54545454545455) internal successors, (413), 11 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:27,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:27,328 INFO L93 Difference]: Finished difference Result 7429 states and 12313 transitions. [2022-11-16 12:01:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:01:27,329 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 37.54545454545455) internal successors, (413), 11 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 527 [2022-11-16 12:01:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:27,342 INFO L225 Difference]: With dead ends: 7429 [2022-11-16 12:01:27,342 INFO L226 Difference]: Without dead ends: 6263 [2022-11-16 12:01:27,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:01:27,348 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 10233 mSDsluCounter, 2645 mSDsCounter, 0 mSdLazyCounter, 7878 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10233 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 7880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:27,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10233 Valid, 2992 Invalid, 7880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7878 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-16 12:01:27,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6263 states. [2022-11-16 12:01:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6263 to 2639. [2022-11-16 12:01:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 2638 states have (on average 1.6592115238817287) internal successors, (4377), 2638 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 4377 transitions. [2022-11-16 12:01:27,431 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 4377 transitions. Word has length 527 [2022-11-16 12:01:27,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:27,432 INFO L495 AbstractCegarLoop]: Abstraction has 2639 states and 4377 transitions. [2022-11-16 12:01:27,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 37.54545454545455) internal successors, (413), 11 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 4377 transitions. [2022-11-16 12:01:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2022-11-16 12:01:27,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:27,441 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:01:27,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:27,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:27,665 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:01:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:27,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1114121494, now seen corresponding path program 1 times [2022-11-16 12:01:27,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:27,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980366277] [2022-11-16 12:01:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:27,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:00,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:00,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980366277] [2022-11-16 12:02:00,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980366277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:00,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636767513] [2022-11-16 12:02:00,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:00,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:00,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:00,279 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:00,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:02:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 4303 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-16 12:02:02,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-16 12:02:04,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:02:04,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636767513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:04,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:02:04,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7] total 17 [2022-11-16 12:02:04,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605437095] [2022-11-16 12:02:04,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:04,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:02:04,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:04,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:02:04,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:02:04,322 INFO L87 Difference]: Start difference. First operand 2639 states and 4377 transitions. Second operand has 12 states, 12 states have (on average 34.666666666666664) internal successors, (416), 12 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:11,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:11,236 INFO L93 Difference]: Finished difference Result 7483 states and 12403 transitions. [2022-11-16 12:02:11,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:02:11,237 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 34.666666666666664) internal successors, (416), 12 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 528 [2022-11-16 12:02:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:11,252 INFO L225 Difference]: With dead ends: 7483 [2022-11-16 12:02:11,252 INFO L226 Difference]: Without dead ends: 6311 [2022-11-16 12:02:11,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=339, Invalid=1067, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 12:02:11,256 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 11240 mSDsluCounter, 2984 mSDsCounter, 0 mSdLazyCounter, 8817 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11240 SdHoareTripleChecker+Valid, 3329 SdHoareTripleChecker+Invalid, 8819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:11,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11240 Valid, 3329 Invalid, 8819 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 8817 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-16 12:02:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2022-11-16 12:02:11,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 2639. [2022-11-16 12:02:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 2638 states have (on average 1.6592115238817287) internal successors, (4377), 2638 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 4377 transitions. [2022-11-16 12:02:11,334 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 4377 transitions. Word has length 528 [2022-11-16 12:02:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:11,335 INFO L495 AbstractCegarLoop]: Abstraction has 2639 states and 4377 transitions. [2022-11-16 12:02:11,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.666666666666664) internal successors, (416), 12 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:11,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 4377 transitions. [2022-11-16 12:02:11,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2022-11-16 12:02:11,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:11,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:02:11,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:11,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:11,567 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:11,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:11,568 INFO L85 PathProgramCache]: Analyzing trace with hash 69222672, now seen corresponding path program 1 times [2022-11-16 12:02:11,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:11,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670453588] [2022-11-16 12:02:11,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:11,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:47,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:47,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670453588] [2022-11-16 12:02:47,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670453588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:47,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548009371] [2022-11-16 12:02:47,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:47,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:47,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:47,762 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:47,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:02:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:49,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 4306 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-16 12:02:49,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-16 12:02:51,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:02:51,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548009371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:51,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:02:51,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7] total 18 [2022-11-16 12:02:51,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833038748] [2022-11-16 12:02:51,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:51,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:02:51,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:51,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:02:51,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:02:51,646 INFO L87 Difference]: Start difference. First operand 2639 states and 4377 transitions. Second operand has 13 states, 13 states have (on average 32.23076923076923) internal successors, (419), 13 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:58,420 INFO L93 Difference]: Finished difference Result 7537 states and 12493 transitions. [2022-11-16 12:02:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 12:02:58,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 32.23076923076923) internal successors, (419), 13 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 529 [2022-11-16 12:02:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:58,431 INFO L225 Difference]: With dead ends: 7537 [2022-11-16 12:02:58,431 INFO L226 Difference]: Without dead ends: 6359 [2022-11-16 12:02:58,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=412, Invalid=1310, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 12:02:58,435 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 12223 mSDsluCounter, 3329 mSDsCounter, 0 mSdLazyCounter, 9758 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12223 SdHoareTripleChecker+Valid, 3672 SdHoareTripleChecker+Invalid, 9760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:58,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12223 Valid, 3672 Invalid, 9760 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 9758 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-16 12:02:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6359 states. [2022-11-16 12:02:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6359 to 2639. [2022-11-16 12:02:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 2638 states have (on average 1.6592115238817287) internal successors, (4377), 2638 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 4377 transitions. [2022-11-16 12:02:58,496 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 4377 transitions. Word has length 529 [2022-11-16 12:02:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:58,497 INFO L495 AbstractCegarLoop]: Abstraction has 2639 states and 4377 transitions. [2022-11-16 12:02:58,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 32.23076923076923) internal successors, (419), 13 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:58,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 4377 transitions. [2022-11-16 12:02:58,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-11-16 12:02:58,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:58,504 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:02:58,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:58,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:02:58,720 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:02:58,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:58,721 INFO L85 PathProgramCache]: Analyzing trace with hash -520921988, now seen corresponding path program 1 times [2022-11-16 12:02:58,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:58,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151598439] [2022-11-16 12:02:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:58,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:28,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:28,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151598439] [2022-11-16 12:03:28,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151598439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:28,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526975580] [2022-11-16 12:03:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:28,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:28,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:28,054 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:28,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:03:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:30,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 4309 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-16 12:03:30,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-16 12:03:32,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:03:32,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526975580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:03:32,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:03:32,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7] total 19 [2022-11-16 12:03:32,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931806956] [2022-11-16 12:03:32,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:03:32,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:03:32,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:03:32,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:03:32,054 INFO L87 Difference]: Start difference. First operand 2639 states and 4377 transitions. Second operand has 14 states, 14 states have (on average 30.142857142857142) internal successors, (422), 14 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:39,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:39,697 INFO L93 Difference]: Finished difference Result 7591 states and 12583 transitions. [2022-11-16 12:03:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 12:03:39,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 30.142857142857142) internal successors, (422), 14 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 530 [2022-11-16 12:03:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:39,708 INFO L225 Difference]: With dead ends: 7591 [2022-11-16 12:03:39,708 INFO L226 Difference]: Without dead ends: 6407 [2022-11-16 12:03:39,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=492, Invalid=1578, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 12:03:39,713 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 13230 mSDsluCounter, 3668 mSDsCounter, 0 mSdLazyCounter, 10701 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13230 SdHoareTripleChecker+Valid, 4009 SdHoareTripleChecker+Invalid, 10703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:39,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13230 Valid, 4009 Invalid, 10703 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 10701 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-16 12:03:39,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6407 states. [2022-11-16 12:03:39,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6407 to 2639. [2022-11-16 12:03:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 2638 states have (on average 1.6592115238817287) internal successors, (4377), 2638 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 4377 transitions. [2022-11-16 12:03:39,785 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 4377 transitions. Word has length 530 [2022-11-16 12:03:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:39,787 INFO L495 AbstractCegarLoop]: Abstraction has 2639 states and 4377 transitions. [2022-11-16 12:03:39,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 30.142857142857142) internal successors, (422), 14 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 4377 transitions. [2022-11-16 12:03:39,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-11-16 12:03:39,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:39,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:03:39,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:40,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:40,011 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:03:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:40,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1991099222, now seen corresponding path program 1 times [2022-11-16 12:03:40,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:40,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257047989] [2022-11-16 12:03:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:40,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:11,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:11,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257047989] [2022-11-16 12:04:11,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257047989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:11,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766870316] [2022-11-16 12:04:11,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:11,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:11,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:11,240 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:11,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:04:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:13,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 4312 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 12:04:14,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-16 12:04:15,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:04:15,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766870316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:04:15,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:04:15,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7] total 20 [2022-11-16 12:04:15,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327449535] [2022-11-16 12:04:15,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:15,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:04:15,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:15,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:04:15,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:04:15,805 INFO L87 Difference]: Start difference. First operand 2639 states and 4377 transitions. Second operand has 15 states, 15 states have (on average 28.333333333333332) internal successors, (425), 15 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:24,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:24,823 INFO L93 Difference]: Finished difference Result 7645 states and 12673 transitions. [2022-11-16 12:04:24,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:04:24,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 28.333333333333332) internal successors, (425), 15 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 531 [2022-11-16 12:04:24,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:24,832 INFO L225 Difference]: With dead ends: 7645 [2022-11-16 12:04:24,833 INFO L226 Difference]: Without dead ends: 6455 [2022-11-16 12:04:24,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=579, Invalid=1871, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 12:04:24,838 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 14242 mSDsluCounter, 4001 mSDsCounter, 0 mSdLazyCounter, 11646 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14242 SdHoareTripleChecker+Valid, 4340 SdHoareTripleChecker+Invalid, 11648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:24,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14242 Valid, 4340 Invalid, 11648 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 11646 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-11-16 12:04:24,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6455 states. [2022-11-16 12:04:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6455 to 2639. [2022-11-16 12:04:24,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 2638 states have (on average 1.6592115238817287) internal successors, (4377), 2638 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 4377 transitions. [2022-11-16 12:04:24,937 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 4377 transitions. Word has length 531 [2022-11-16 12:04:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:24,939 INFO L495 AbstractCegarLoop]: Abstraction has 2639 states and 4377 transitions. [2022-11-16 12:04:24,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 28.333333333333332) internal successors, (425), 15 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:24,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 4377 transitions. [2022-11-16 12:04:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2022-11-16 12:04:24,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:24,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:04:24,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:25,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:04:25,184 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:04:25,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:25,184 INFO L85 PathProgramCache]: Analyzing trace with hash 572091936, now seen corresponding path program 1 times [2022-11-16 12:04:25,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:25,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730139602] [2022-11-16 12:04:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:25,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:34,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:34,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730139602] [2022-11-16 12:04:34,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730139602] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:34,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963930702] [2022-11-16 12:04:34,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:34,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:34,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:34,868 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:34,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:04:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:37,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 4315 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-16 12:04:37,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-16 12:04:39,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:04:39,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963930702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:04:39,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:04:39,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [7] total 21 [2022-11-16 12:04:39,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346034397] [2022-11-16 12:04:39,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:04:39,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:04:39,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:39,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:04:39,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:04:39,389 INFO L87 Difference]: Start difference. First operand 2639 states and 4377 transitions. Second operand has 16 states, 16 states have (on average 26.75) internal successors, (428), 16 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:49,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:04:49,033 INFO L93 Difference]: Finished difference Result 7699 states and 12763 transitions. [2022-11-16 12:04:49,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 12:04:49,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 26.75) internal successors, (428), 16 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 532 [2022-11-16 12:04:49,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:04:49,043 INFO L225 Difference]: With dead ends: 7699 [2022-11-16 12:04:49,043 INFO L226 Difference]: Without dead ends: 6503 [2022-11-16 12:04:49,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=673, Invalid=2189, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 12:04:49,047 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 15255 mSDsluCounter, 4337 mSDsCounter, 0 mSdLazyCounter, 12593 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15255 SdHoareTripleChecker+Valid, 4674 SdHoareTripleChecker+Invalid, 12595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:04:49,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15255 Valid, 4674 Invalid, 12595 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 12593 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-11-16 12:04:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6503 states. [2022-11-16 12:04:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6503 to 2639. [2022-11-16 12:04:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 2638 states have (on average 1.6592115238817287) internal successors, (4377), 2638 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 4377 transitions. [2022-11-16 12:04:49,116 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 4377 transitions. Word has length 532 [2022-11-16 12:04:49,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:04:49,118 INFO L495 AbstractCegarLoop]: Abstraction has 2639 states and 4377 transitions. [2022-11-16 12:04:49,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 26.75) internal successors, (428), 16 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 4377 transitions. [2022-11-16 12:04:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2022-11-16 12:04:49,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:04:49,125 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:04:49,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:49,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:04:49,335 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:04:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:49,336 INFO L85 PathProgramCache]: Analyzing trace with hash 18153090, now seen corresponding path program 1 times [2022-11-16 12:04:49,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:49,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585188623] [2022-11-16 12:04:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:49,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:18,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:18,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585188623] [2022-11-16 12:05:18,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585188623] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:18,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358290705] [2022-11-16 12:05:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:18,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:18,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:18,241 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:18,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:05:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:20,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 4318 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-16 12:05:20,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-16 12:05:22,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:05:22,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358290705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:05:22,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:05:22,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [7] total 22 [2022-11-16 12:05:22,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318791065] [2022-11-16 12:05:22,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:05:22,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:05:22,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:22,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:05:22,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:05:22,573 INFO L87 Difference]: Start difference. First operand 2639 states and 4377 transitions. Second operand has 17 states, 17 states have (on average 25.352941176470587) internal successors, (431), 17 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:32,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:05:32,514 INFO L93 Difference]: Finished difference Result 7753 states and 12853 transitions. [2022-11-16 12:05:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 12:05:32,515 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 25.352941176470587) internal successors, (431), 17 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 533 [2022-11-16 12:05:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:05:32,523 INFO L225 Difference]: With dead ends: 7753 [2022-11-16 12:05:32,523 INFO L226 Difference]: Without dead ends: 6551 [2022-11-16 12:05:32,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=774, Invalid=2532, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 12:05:32,528 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 16277 mSDsluCounter, 4662 mSDsCounter, 0 mSdLazyCounter, 13542 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16277 SdHoareTripleChecker+Valid, 4997 SdHoareTripleChecker+Invalid, 13544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:05:32,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16277 Valid, 4997 Invalid, 13544 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 13542 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-11-16 12:05:32,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2022-11-16 12:05:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 2639. [2022-11-16 12:05:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 2638 states have (on average 1.6592115238817287) internal successors, (4377), 2638 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 4377 transitions. [2022-11-16 12:05:32,601 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 4377 transitions. Word has length 533 [2022-11-16 12:05:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:05:32,602 INFO L495 AbstractCegarLoop]: Abstraction has 2639 states and 4377 transitions. [2022-11-16 12:05:32,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 25.352941176470587) internal successors, (431), 17 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:32,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 4377 transitions. [2022-11-16 12:05:32,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2022-11-16 12:05:32,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:05:32,610 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:05:32,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-16 12:05:32,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:05:32,824 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:05:32,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:32,824 INFO L85 PathProgramCache]: Analyzing trace with hash -357422714, now seen corresponding path program 1 times [2022-11-16 12:05:32,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:32,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309220047] [2022-11-16 12:05:32,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:32,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:41,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:41,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309220047] [2022-11-16 12:05:41,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309220047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:41,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128977186] [2022-11-16 12:05:41,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:41,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:41,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:41,706 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:41,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d1b8ae9-8b40-451c-83f8-e79550f51e95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:05:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:44,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 4321 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-16 12:05:44,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:05:46,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-16 12:05:50,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128977186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:50,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:50,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 21, 17] total 41 [2022-11-16 12:05:50,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33255643] [2022-11-16 12:05:50,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:50,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 12:05:50,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:50,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 12:05:50,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1494, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 12:05:50,291 INFO L87 Difference]: Start difference. First operand 2639 states and 4377 transitions. Second operand has 41 states, 41 states have (on average 35.8780487804878) internal successors, (1471), 41 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)