./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 66e52001defd7e771c0df8c73cdf4ec6b3d90072c8faf9f52fce6d45ff1a83e7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:51:57,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:51:57,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:51:57,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:51:57,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:51:57,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:51:57,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:51:57,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:51:57,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:51:57,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:51:57,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:51:57,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:51:57,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:51:57,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:51:57,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:51:57,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:51:57,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:51:57,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:51:57,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:51:57,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:51:57,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:51:57,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:51:57,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:51:57,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:51:57,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:51:57,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:51:57,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:51:57,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:51:57,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:51:57,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:51:57,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:51:57,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:51:57,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:51:57,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:51:57,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:51:57,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:51:57,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:51:57,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:51:57,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:51:57,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:51:57,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:51:57,416 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:51:57,454 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:51:57,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:51:57,455 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:51:57,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:51:57,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:51:57,456 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:51:57,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:51:57,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:51:57,458 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:51:57,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:51:57,459 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:51:57,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:51:57,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:51:57,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:51:57,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:51:57,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:51:57,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:51:57,461 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:51:57,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:51:57,461 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:51:57,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:51:57,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:51:57,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:51:57,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:51:57,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:51:57,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:51:57,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:51:57,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:51:57,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:51:57,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:51:57,463 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:51:57,464 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:51:57,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:51:57,464 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_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66e52001defd7e771c0df8c73cdf4ec6b3d90072c8faf9f52fce6d45ff1a83e7 [2022-11-20 11:51:57,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:51:57,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:51:57,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:51:57,793 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:51:57,794 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:51:57,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2022-11-20 11:52:00,910 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:52:01,166 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:52:01,166 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2022-11-20 11:52:01,180 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/data/616536cf5/0a21948aecfa4073af8778347fee8397/FLAG78db033ef [2022-11-20 11:52:01,201 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/data/616536cf5/0a21948aecfa4073af8778347fee8397 [2022-11-20 11:52:01,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:52:01,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:52:01,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:52:01,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:52:01,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:52:01,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:52:01" (1/1) ... [2022-11-20 11:52:01,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@407eb7ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:01, skipping insertion in model container [2022-11-20 11:52:01,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:52:01" (1/1) ... [2022-11-20 11:52:01,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:52:01,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:52:01,425 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c[6080,6093] [2022-11-20 11:52:01,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:52:01,447 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:52:01,515 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c[6080,6093] [2022-11-20 11:52:01,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:52:01,538 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:52:01,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:01 WrapperNode [2022-11-20 11:52:01,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:52:01,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:52:01,540 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:52:01,540 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:52:01,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:01" (1/1) ... [2022-11-20 11:52:01,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:01" (1/1) ... [2022-11-20 11:52:01,582 INFO L138 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 208 [2022-11-20 11:52:01,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:52:01,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:52:01,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:52:01,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:52:01,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:01" (1/1) ... [2022-11-20 11:52:01,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:01" (1/1) ... [2022-11-20 11:52:01,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:01" (1/1) ... [2022-11-20 11:52:01,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:01" (1/1) ... [2022-11-20 11:52:01,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:01" (1/1) ... [2022-11-20 11:52:01,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:01" (1/1) ... [2022-11-20 11:52:01,605 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:01" (1/1) ... [2022-11-20 11:52:01,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:01" (1/1) ... [2022-11-20 11:52:01,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:52:01,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:52:01,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:52:01,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:52:01,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:01" (1/1) ... [2022-11-20 11:52:01,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:52:01,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:01,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:52:01,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:52:01,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:52:01,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:52:01,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:52:01,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:52:01,793 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:52:01,796 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:52:02,241 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:52:02,249 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:52:02,250 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 11:52:02,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:52:02 BoogieIcfgContainer [2022-11-20 11:52:02,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:52:02,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:52:02,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:52:02,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:52:02,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:52:01" (1/3) ... [2022-11-20 11:52:02,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23697d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:52:02, skipping insertion in model container [2022-11-20 11:52:02,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:01" (2/3) ... [2022-11-20 11:52:02,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23697d98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:52:02, skipping insertion in model container [2022-11-20 11:52:02,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:52:02" (3/3) ... [2022-11-20 11:52:02,265 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2022-11-20 11:52:02,293 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:52:02,293 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:52:02,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:52:02,348 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;@2196a396, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:52:02,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:52:02,354 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 57 states have internal predecessors, (95), 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) [2022-11-20 11:52:02,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:52:02,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:02,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:02,362 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:02,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:02,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1507300432, now seen corresponding path program 1 times [2022-11-20 11:52:02,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:02,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642062094] [2022-11-20 11:52:02,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:02,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:02,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:02,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642062094] [2022-11-20 11:52:02,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642062094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:02,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:02,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:52:02,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103928131] [2022-11-20 11:52:02,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:02,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:52:02,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:02,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:52:02,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:52:02,730 INFO L87 Difference]: Start difference. First operand has 58 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 57 states have internal predecessors, (95), 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 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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) [2022-11-20 11:52:02,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:02,748 INFO L93 Difference]: Finished difference Result 91 states and 149 transitions. [2022-11-20 11:52:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:52:02,750 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 19 [2022-11-20 11:52:02,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:02,760 INFO L225 Difference]: With dead ends: 91 [2022-11-20 11:52:02,760 INFO L226 Difference]: Without dead ends: 54 [2022-11-20 11:52:02,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:52:02,766 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:02,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:52:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-20 11:52:02,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-11-20 11:52:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 53 states have internal predecessors, (88), 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) [2022-11-20 11:52:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 88 transitions. [2022-11-20 11:52:02,804 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 88 transitions. Word has length 19 [2022-11-20 11:52:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:02,804 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 88 transitions. [2022-11-20 11:52:02,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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) [2022-11-20 11:52:02,805 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 88 transitions. [2022-11-20 11:52:02,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:52:02,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:02,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:02,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:52:02,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:02,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:02,808 INFO L85 PathProgramCache]: Analyzing trace with hash 496183182, now seen corresponding path program 1 times [2022-11-20 11:52:02,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:02,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976581850] [2022-11-20 11:52:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:02,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:03,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:03,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976581850] [2022-11-20 11:52:03,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976581850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:03,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:03,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:52:03,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886793521] [2022-11-20 11:52:03,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:03,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:52:03,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:03,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:52:03,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:52:03,018 INFO L87 Difference]: Start difference. First operand 54 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-11-20 11:52:03,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:03,089 INFO L93 Difference]: Finished difference Result 90 states and 142 transitions. [2022-11-20 11:52:03,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:52:03,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 19 [2022-11-20 11:52:03,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:03,091 INFO L225 Difference]: With dead ends: 90 [2022-11-20 11:52:03,091 INFO L226 Difference]: Without dead ends: 54 [2022-11-20 11:52:03,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:52:03,093 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 3 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:03,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 325 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:52:03,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-20 11:52:03,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-11-20 11:52:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 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) [2022-11-20 11:52:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2022-11-20 11:52:03,101 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 19 [2022-11-20 11:52:03,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:03,102 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2022-11-20 11:52:03,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-11-20 11:52:03,102 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2022-11-20 11:52:03,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 11:52:03,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:03,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:03,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:52:03,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:03,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2010748053, now seen corresponding path program 1 times [2022-11-20 11:52:03,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:03,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535575546] [2022-11-20 11:52:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:03,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:03,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:03,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535575546] [2022-11-20 11:52:03,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535575546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:03,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:03,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:52:03,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544443750] [2022-11-20 11:52:03,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:03,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:52:03,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:03,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:52:03,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:52:03,354 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2022-11-20 11:52:03,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:03,556 INFO L93 Difference]: Finished difference Result 246 states and 372 transitions. [2022-11-20 11:52:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:52:03,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 34 [2022-11-20 11:52:03,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:03,567 INFO L225 Difference]: With dead ends: 246 [2022-11-20 11:52:03,567 INFO L226 Difference]: Without dead ends: 214 [2022-11-20 11:52:03,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:52:03,573 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 327 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:03,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 350 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:52:03,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-20 11:52:03,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 84. [2022-11-20 11:52:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.4337349397590362) internal successors, (119), 83 states have internal predecessors, (119), 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) [2022-11-20 11:52:03,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 119 transitions. [2022-11-20 11:52:03,596 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 119 transitions. Word has length 34 [2022-11-20 11:52:03,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:03,597 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 119 transitions. [2022-11-20 11:52:03,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2022-11-20 11:52:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 119 transitions. [2022-11-20 11:52:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:52:03,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:03,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:03,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:52:03,604 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:03,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:03,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1009296933, now seen corresponding path program 1 times [2022-11-20 11:52:03,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:03,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503878601] [2022-11-20 11:52:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:03,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:03,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:03,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503878601] [2022-11-20 11:52:03,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503878601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:03,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:03,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:52:03,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809830936] [2022-11-20 11:52:03,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:03,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:52:03,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:03,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:52:03,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:52:03,782 INFO L87 Difference]: Start difference. First operand 84 states and 119 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-11-20 11:52:03,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:03,821 INFO L93 Difference]: Finished difference Result 197 states and 294 transitions. [2022-11-20 11:52:03,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:52:03,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 36 [2022-11-20 11:52:03,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:03,823 INFO L225 Difference]: With dead ends: 197 [2022-11-20 11:52:03,824 INFO L226 Difference]: Without dead ends: 135 [2022-11-20 11:52:03,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:52:03,826 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 29 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:03,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 111 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:52:03,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-20 11:52:03,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-11-20 11:52:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.4538461538461538) internal successors, (189), 130 states have internal predecessors, (189), 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) [2022-11-20 11:52:03,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 189 transitions. [2022-11-20 11:52:03,848 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 189 transitions. Word has length 36 [2022-11-20 11:52:03,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:03,849 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 189 transitions. [2022-11-20 11:52:03,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-11-20 11:52:03,849 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 189 transitions. [2022-11-20 11:52:03,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:52:03,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:03,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:03,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:52:03,852 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:03,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:03,852 INFO L85 PathProgramCache]: Analyzing trace with hash -942803421, now seen corresponding path program 1 times [2022-11-20 11:52:03,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:03,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656191526] [2022-11-20 11:52:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:03,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:04,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:04,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656191526] [2022-11-20 11:52:04,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656191526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:04,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:04,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:52:04,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548250452] [2022-11-20 11:52:04,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:04,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:52:04,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:04,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:52:04,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:52:04,129 INFO L87 Difference]: Start difference. First operand 131 states and 189 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-11-20 11:52:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:04,223 INFO L93 Difference]: Finished difference Result 242 states and 357 transitions. [2022-11-20 11:52:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:52:04,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 36 [2022-11-20 11:52:04,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:04,225 INFO L225 Difference]: With dead ends: 242 [2022-11-20 11:52:04,226 INFO L226 Difference]: Without dead ends: 133 [2022-11-20 11:52:04,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:52:04,235 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 112 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:04,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 163 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:52:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-20 11:52:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2022-11-20 11:52:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.4384615384615385) internal successors, (187), 130 states have internal predecessors, (187), 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) [2022-11-20 11:52:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2022-11-20 11:52:04,261 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 36 [2022-11-20 11:52:04,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:04,262 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2022-11-20 11:52:04,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-11-20 11:52:04,262 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2022-11-20 11:52:04,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 11:52:04,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:04,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:04,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:52:04,269 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:04,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:04,270 INFO L85 PathProgramCache]: Analyzing trace with hash 423141804, now seen corresponding path program 1 times [2022-11-20 11:52:04,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:04,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244203983] [2022-11-20 11:52:04,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:04,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:04,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:04,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244203983] [2022-11-20 11:52:04,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244203983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:04,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:04,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:52:04,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417230113] [2022-11-20 11:52:04,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:04,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:52:04,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:04,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:52:04,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:52:04,569 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 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) [2022-11-20 11:52:04,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:04,752 INFO L93 Difference]: Finished difference Result 236 states and 341 transitions. [2022-11-20 11:52:04,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:52:04,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 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 37 [2022-11-20 11:52:04,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:04,756 INFO L225 Difference]: With dead ends: 236 [2022-11-20 11:52:04,756 INFO L226 Difference]: Without dead ends: 234 [2022-11-20 11:52:04,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:52:04,761 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 292 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:04,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 370 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:52:04,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-20 11:52:04,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 137. [2022-11-20 11:52:04,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.411764705882353) internal successors, (192), 136 states have internal predecessors, (192), 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) [2022-11-20 11:52:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 192 transitions. [2022-11-20 11:52:04,796 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 192 transitions. Word has length 37 [2022-11-20 11:52:04,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:04,796 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 192 transitions. [2022-11-20 11:52:04,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 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) [2022-11-20 11:52:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 192 transitions. [2022-11-20 11:52:04,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 11:52:04,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:04,799 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] [2022-11-20 11:52:04,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:52:04,799 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash -107409885, now seen corresponding path program 1 times [2022-11-20 11:52:04,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:04,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965647760] [2022-11-20 11:52:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:04,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:04,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:04,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965647760] [2022-11-20 11:52:04,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965647760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:04,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:04,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:52:04,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21914039] [2022-11-20 11:52:04,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:04,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:52:04,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:04,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:52:04,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:52:04,844 INFO L87 Difference]: Start difference. First operand 137 states and 192 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-11-20 11:52:04,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:04,887 INFO L93 Difference]: Finished difference Result 351 states and 504 transitions. [2022-11-20 11:52:04,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:52:04,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 38 [2022-11-20 11:52:04,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:04,889 INFO L225 Difference]: With dead ends: 351 [2022-11-20 11:52:04,889 INFO L226 Difference]: Without dead ends: 236 [2022-11-20 11:52:04,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:52:04,891 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 38 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:04,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 154 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:52:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-11-20 11:52:04,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2022-11-20 11:52:04,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.4120171673819744) internal successors, (329), 233 states have internal predecessors, (329), 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) [2022-11-20 11:52:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 329 transitions. [2022-11-20 11:52:04,930 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 329 transitions. Word has length 38 [2022-11-20 11:52:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:04,930 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 329 transitions. [2022-11-20 11:52:04,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-11-20 11:52:04,930 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 329 transitions. [2022-11-20 11:52:04,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 11:52:04,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:04,932 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] [2022-11-20 11:52:04,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:52:04,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:04,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:04,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1673522979, now seen corresponding path program 1 times [2022-11-20 11:52:04,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:04,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463912089] [2022-11-20 11:52:04,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:04,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:04,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:04,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463912089] [2022-11-20 11:52:04,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463912089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:04,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:04,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:52:04,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869813087] [2022-11-20 11:52:04,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:04,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:52:04,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:04,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:52:04,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:52:04,978 INFO L87 Difference]: Start difference. First operand 234 states and 329 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-11-20 11:52:05,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:05,056 INFO L93 Difference]: Finished difference Result 626 states and 887 transitions. [2022-11-20 11:52:05,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:52:05,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 38 [2022-11-20 11:52:05,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:05,059 INFO L225 Difference]: With dead ends: 626 [2022-11-20 11:52:05,059 INFO L226 Difference]: Without dead ends: 414 [2022-11-20 11:52:05,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:52:05,061 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 36 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:05,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 156 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:52:05,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-20 11:52:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 412. [2022-11-20 11:52:05,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.389294403892944) internal successors, (571), 411 states have internal predecessors, (571), 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) [2022-11-20 11:52:05,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 571 transitions. [2022-11-20 11:52:05,139 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 571 transitions. Word has length 38 [2022-11-20 11:52:05,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:05,139 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 571 transitions. [2022-11-20 11:52:05,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-11-20 11:52:05,139 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 571 transitions. [2022-11-20 11:52:05,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 11:52:05,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:05,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:05,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:52:05,141 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:05,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:05,141 INFO L85 PathProgramCache]: Analyzing trace with hash 913154302, now seen corresponding path program 1 times [2022-11-20 11:52:05,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:05,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158845300] [2022-11-20 11:52:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:05,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:05,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158845300] [2022-11-20 11:52:05,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158845300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:05,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:05,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:52:05,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810010827] [2022-11-20 11:52:05,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:05,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:52:05,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:05,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:52:05,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:52:05,187 INFO L87 Difference]: Start difference. First operand 412 states and 571 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-11-20 11:52:05,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:05,304 INFO L93 Difference]: Finished difference Result 835 states and 1177 transitions. [2022-11-20 11:52:05,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:52:05,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2022-11-20 11:52:05,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:05,307 INFO L225 Difference]: With dead ends: 835 [2022-11-20 11:52:05,307 INFO L226 Difference]: Without dead ends: 600 [2022-11-20 11:52:05,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:52:05,308 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 37 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:05,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 155 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:52:05,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-11-20 11:52:05,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 598. [2022-11-20 11:52:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.3819095477386936) internal successors, (825), 597 states have internal predecessors, (825), 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) [2022-11-20 11:52:05,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 825 transitions. [2022-11-20 11:52:05,416 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 825 transitions. Word has length 40 [2022-11-20 11:52:05,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:05,417 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 825 transitions. [2022-11-20 11:52:05,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-11-20 11:52:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 825 transitions. [2022-11-20 11:52:05,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 11:52:05,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:05,421 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:52:05,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:52:05,421 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:05,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:05,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2071314416, now seen corresponding path program 1 times [2022-11-20 11:52:05,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:05,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286460057] [2022-11-20 11:52:05,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:05,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:52:05,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:05,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286460057] [2022-11-20 11:52:05,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286460057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:05,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:05,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:52:05,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656252584] [2022-11-20 11:52:05,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:05,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:52:05,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:05,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:52:05,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:52:05,599 INFO L87 Difference]: Start difference. First operand 598 states and 825 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2022-11-20 11:52:06,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:06,000 INFO L93 Difference]: Finished difference Result 2454 states and 3405 transitions. [2022-11-20 11:52:06,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:52:06,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 53 [2022-11-20 11:52:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:06,009 INFO L225 Difference]: With dead ends: 2454 [2022-11-20 11:52:06,009 INFO L226 Difference]: Without dead ends: 1880 [2022-11-20 11:52:06,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:52:06,011 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 173 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:06,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 293 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:52:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2022-11-20 11:52:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1170. [2022-11-20 11:52:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 1.3798118049615056) internal successors, (1613), 1169 states have internal predecessors, (1613), 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) [2022-11-20 11:52:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1613 transitions. [2022-11-20 11:52:06,228 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1613 transitions. Word has length 53 [2022-11-20 11:52:06,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:06,229 INFO L495 AbstractCegarLoop]: Abstraction has 1170 states and 1613 transitions. [2022-11-20 11:52:06,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2022-11-20 11:52:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1613 transitions. [2022-11-20 11:52:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 11:52:06,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:06,231 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:52:06,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:52:06,232 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:06,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:06,232 INFO L85 PathProgramCache]: Analyzing trace with hash -442720016, now seen corresponding path program 1 times [2022-11-20 11:52:06,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:06,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652747591] [2022-11-20 11:52:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:06,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:52:06,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:06,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652747591] [2022-11-20 11:52:06,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652747591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:06,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:06,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:52:06,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635758912] [2022-11-20 11:52:06,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:06,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:52:06,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:06,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:52:06,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:52:06,407 INFO L87 Difference]: Start difference. First operand 1170 states and 1613 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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) [2022-11-20 11:52:06,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:06,831 INFO L93 Difference]: Finished difference Result 3026 states and 4193 transitions. [2022-11-20 11:52:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:52:06,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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 53 [2022-11-20 11:52:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:06,840 INFO L225 Difference]: With dead ends: 3026 [2022-11-20 11:52:06,840 INFO L226 Difference]: Without dead ends: 2452 [2022-11-20 11:52:06,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:52:06,843 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 182 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:06,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 270 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:52:06,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2022-11-20 11:52:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2030. [2022-11-20 11:52:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 1.3725973385904386) internal successors, (2785), 2029 states have internal predecessors, (2785), 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) [2022-11-20 11:52:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 2785 transitions. [2022-11-20 11:52:07,154 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 2785 transitions. Word has length 53 [2022-11-20 11:52:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:07,154 INFO L495 AbstractCegarLoop]: Abstraction has 2030 states and 2785 transitions. [2022-11-20 11:52:07,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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) [2022-11-20 11:52:07,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 2785 transitions. [2022-11-20 11:52:07,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:52:07,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:07,157 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:52:07,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:52:07,158 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:07,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:07,158 INFO L85 PathProgramCache]: Analyzing trace with hash 614088040, now seen corresponding path program 1 times [2022-11-20 11:52:07,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:07,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765525170] [2022-11-20 11:52:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:07,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:07,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:07,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765525170] [2022-11-20 11:52:07,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765525170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:07,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:07,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:52:07,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156317114] [2022-11-20 11:52:07,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:07,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:52:07,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:07,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:52:07,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:52:07,286 INFO L87 Difference]: Start difference. First operand 2030 states and 2785 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2022-11-20 11:52:07,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:07,507 INFO L93 Difference]: Finished difference Result 3506 states and 4848 transitions. [2022-11-20 11:52:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:52:07,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 55 [2022-11-20 11:52:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:07,513 INFO L225 Difference]: With dead ends: 3506 [2022-11-20 11:52:07,514 INFO L226 Difference]: Without dead ends: 1500 [2022-11-20 11:52:07,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:52:07,517 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 34 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:07,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 153 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:52:07,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2022-11-20 11:52:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1498. [2022-11-20 11:52:07,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 1.3740814963259853) internal successors, (2057), 1497 states have internal predecessors, (2057), 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) [2022-11-20 11:52:07,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 2057 transitions. [2022-11-20 11:52:07,772 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 2057 transitions. Word has length 55 [2022-11-20 11:52:07,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:07,772 INFO L495 AbstractCegarLoop]: Abstraction has 1498 states and 2057 transitions. [2022-11-20 11:52:07,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2022-11-20 11:52:07,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 2057 transitions. [2022-11-20 11:52:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:52:07,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:07,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:07,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:52:07,774 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:07,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1276832885, now seen corresponding path program 1 times [2022-11-20 11:52:07,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:07,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909161481] [2022-11-20 11:52:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:07,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:52:07,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:07,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909161481] [2022-11-20 11:52:07,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909161481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:07,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:07,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:52:07,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86039451] [2022-11-20 11:52:07,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:07,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:52:07,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:07,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:52:07,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:52:07,888 INFO L87 Difference]: Start difference. First operand 1498 states and 2057 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2022-11-20 11:52:08,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:08,254 INFO L93 Difference]: Finished difference Result 2754 states and 3813 transitions. [2022-11-20 11:52:08,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:52:08,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 55 [2022-11-20 11:52:08,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:08,263 INFO L225 Difference]: With dead ends: 2754 [2022-11-20 11:52:08,263 INFO L226 Difference]: Without dead ends: 2336 [2022-11-20 11:52:08,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:52:08,265 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 174 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:08,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 296 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:52:08,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2022-11-20 11:52:08,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1914. [2022-11-20 11:52:08,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 1.3763721902770518) internal successors, (2633), 1913 states have internal predecessors, (2633), 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) [2022-11-20 11:52:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2633 transitions. [2022-11-20 11:52:08,528 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2633 transitions. Word has length 55 [2022-11-20 11:52:08,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:08,528 INFO L495 AbstractCegarLoop]: Abstraction has 1914 states and 2633 transitions. [2022-11-20 11:52:08,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2022-11-20 11:52:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2633 transitions. [2022-11-20 11:52:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 11:52:08,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:08,529 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:52:08,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:52:08,530 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:08,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:08,530 INFO L85 PathProgramCache]: Analyzing trace with hash -935959243, now seen corresponding path program 1 times [2022-11-20 11:52:08,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:08,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43384518] [2022-11-20 11:52:08,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:08,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:08,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:08,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43384518] [2022-11-20 11:52:08,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43384518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:08,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:08,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:52:08,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732565134] [2022-11-20 11:52:08,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:08,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:52:08,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:08,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:52:08,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:52:08,617 INFO L87 Difference]: Start difference. First operand 1914 states and 2633 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2022-11-20 11:52:08,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:08,743 INFO L93 Difference]: Finished difference Result 2854 states and 3931 transitions. [2022-11-20 11:52:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:52:08,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2022-11-20 11:52:08,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:08,747 INFO L225 Difference]: With dead ends: 2854 [2022-11-20 11:52:08,748 INFO L226 Difference]: Without dead ends: 980 [2022-11-20 11:52:08,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:52:08,751 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 29 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:08,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 138 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:52:08,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-11-20 11:52:08,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 978. [2022-11-20 11:52:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 1.3500511770726715) internal successors, (1319), 977 states have internal predecessors, (1319), 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) [2022-11-20 11:52:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1319 transitions. [2022-11-20 11:52:08,938 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1319 transitions. Word has length 56 [2022-11-20 11:52:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:08,938 INFO L495 AbstractCegarLoop]: Abstraction has 978 states and 1319 transitions. [2022-11-20 11:52:08,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2022-11-20 11:52:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1319 transitions. [2022-11-20 11:52:08,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 11:52:08,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:08,939 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:52:08,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:52:08,940 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:08,940 INFO L85 PathProgramCache]: Analyzing trace with hash 735785191, now seen corresponding path program 1 times [2022-11-20 11:52:08,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:08,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196695716] [2022-11-20 11:52:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:08,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:09,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:09,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196695716] [2022-11-20 11:52:09,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196695716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:52:09,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:52:09,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:52:09,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369569212] [2022-11-20 11:52:09,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:52:09,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:52:09,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:09,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:52:09,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:52:09,022 INFO L87 Difference]: Start difference. First operand 978 states and 1319 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-20 11:52:09,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:09,092 INFO L93 Difference]: Finished difference Result 1450 states and 1960 transitions. [2022-11-20 11:52:09,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:52:09,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2022-11-20 11:52:09,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:09,095 INFO L225 Difference]: With dead ends: 1450 [2022-11-20 11:52:09,095 INFO L226 Difference]: Without dead ends: 512 [2022-11-20 11:52:09,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:52:09,097 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 26 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:09,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 123 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:52:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-20 11:52:09,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 510. [2022-11-20 11:52:09,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.3182711198428292) internal successors, (671), 509 states have internal predecessors, (671), 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) [2022-11-20 11:52:09,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 671 transitions. [2022-11-20 11:52:09,178 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 671 transitions. Word has length 58 [2022-11-20 11:52:09,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:09,178 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 671 transitions. [2022-11-20 11:52:09,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-20 11:52:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 671 transitions. [2022-11-20 11:52:09,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 11:52:09,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:09,179 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:52:09,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:52:09,180 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:09,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:09,180 INFO L85 PathProgramCache]: Analyzing trace with hash -967290087, now seen corresponding path program 1 times [2022-11-20 11:52:09,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:09,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692515414] [2022-11-20 11:52:09,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:09,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:09,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:09,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692515414] [2022-11-20 11:52:09,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692515414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:09,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304050011] [2022-11-20 11:52:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:09,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:09,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:09,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:09,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:52:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:09,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:52:09,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:52:10,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:52:10,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304050011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:10,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:10,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2022-11-20 11:52:10,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572102384] [2022-11-20 11:52:10,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:10,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:52:10,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:10,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:52:10,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:52:10,371 INFO L87 Difference]: Start difference. First operand 510 states and 671 transitions. Second operand has 14 states, 14 states have (on average 11.714285714285714) internal successors, (164), 14 states have internal predecessors, (164), 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) [2022-11-20 11:52:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:12,697 INFO L93 Difference]: Finished difference Result 3029 states and 4002 transitions. [2022-11-20 11:52:12,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 11:52:12,698 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.714285714285714) internal successors, (164), 14 states have internal predecessors, (164), 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 60 [2022-11-20 11:52:12,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:12,706 INFO L225 Difference]: With dead ends: 3029 [2022-11-20 11:52:12,707 INFO L226 Difference]: Without dead ends: 2559 [2022-11-20 11:52:12,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 11:52:12,709 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 1493 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:12,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1493 Valid, 535 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:52:12,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2022-11-20 11:52:13,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 2113. [2022-11-20 11:52:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 1.2471590909090908) internal successors, (2634), 2112 states have internal predecessors, (2634), 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) [2022-11-20 11:52:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 2634 transitions. [2022-11-20 11:52:13,190 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 2634 transitions. Word has length 60 [2022-11-20 11:52:13,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:13,190 INFO L495 AbstractCegarLoop]: Abstraction has 2113 states and 2634 transitions. [2022-11-20 11:52:13,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.714285714285714) internal successors, (164), 14 states have internal predecessors, (164), 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) [2022-11-20 11:52:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 2634 transitions. [2022-11-20 11:52:13,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-20 11:52:13,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:13,197 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:52:13,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 11:52:13,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:52:13,403 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:13,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:13,404 INFO L85 PathProgramCache]: Analyzing trace with hash 97531615, now seen corresponding path program 1 times [2022-11-20 11:52:13,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:13,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156515872] [2022-11-20 11:52:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:13,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:13,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156515872] [2022-11-20 11:52:13,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156515872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973540011] [2022-11-20 11:52:13,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:13,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:13,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:13,881 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:13,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:52:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:13,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:52:13,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:14,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:16,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973540011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:16,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:16,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 28 [2022-11-20 11:52:16,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172150487] [2022-11-20 11:52:16,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:16,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 11:52:16,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:16,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 11:52:16,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:52:16,196 INFO L87 Difference]: Start difference. First operand 2113 states and 2634 transitions. Second operand has 28 states, 28 states have (on average 5.428571428571429) internal successors, (152), 28 states have internal predecessors, (152), 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) [2022-11-20 11:52:18,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:18,185 INFO L93 Difference]: Finished difference Result 5770 states and 7209 transitions. [2022-11-20 11:52:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:52:18,186 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.428571428571429) internal successors, (152), 28 states have internal predecessors, (152), 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 61 [2022-11-20 11:52:18,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:18,199 INFO L225 Difference]: With dead ends: 5770 [2022-11-20 11:52:18,200 INFO L226 Difference]: Without dead ends: 3952 [2022-11-20 11:52:18,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=518, Invalid=1552, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 11:52:18,204 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 793 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:18,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 673 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:52:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2022-11-20 11:52:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 2820. [2022-11-20 11:52:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2820 states, 2819 states have (on average 1.241575026605179) internal successors, (3500), 2819 states have internal predecessors, (3500), 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) [2022-11-20 11:52:18,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2820 states to 2820 states and 3500 transitions. [2022-11-20 11:52:18,776 INFO L78 Accepts]: Start accepts. Automaton has 2820 states and 3500 transitions. Word has length 61 [2022-11-20 11:52:18,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:18,777 INFO L495 AbstractCegarLoop]: Abstraction has 2820 states and 3500 transitions. [2022-11-20 11:52:18,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.428571428571429) internal successors, (152), 28 states have internal predecessors, (152), 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) [2022-11-20 11:52:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2820 states and 3500 transitions. [2022-11-20 11:52:18,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-20 11:52:18,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:18,779 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:52:18,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:18,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:52:18,985 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:18,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:18,985 INFO L85 PathProgramCache]: Analyzing trace with hash 517708881, now seen corresponding path program 1 times [2022-11-20 11:52:18,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:18,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718989988] [2022-11-20 11:52:18,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:18,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:19,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:19,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718989988] [2022-11-20 11:52:19,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718989988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:19,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139855172] [2022-11-20 11:52:19,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:19,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:19,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:19,375 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:19,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:52:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:19,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:52:19,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:20,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:21,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139855172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:21,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:21,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 32 [2022-11-20 11:52:21,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037474694] [2022-11-20 11:52:21,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:21,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 11:52:21,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:21,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 11:52:21,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:52:21,867 INFO L87 Difference]: Start difference. First operand 2820 states and 3500 transitions. Second operand has 32 states, 32 states have (on average 5.125) internal successors, (164), 32 states have internal predecessors, (164), 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) [2022-11-20 11:52:24,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:52:24,933 INFO L93 Difference]: Finished difference Result 9549 states and 11726 transitions. [2022-11-20 11:52:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:52:24,933 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.125) internal successors, (164), 32 states have internal predecessors, (164), 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 61 [2022-11-20 11:52:24,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:52:24,958 INFO L225 Difference]: With dead ends: 9549 [2022-11-20 11:52:24,958 INFO L226 Difference]: Without dead ends: 7302 [2022-11-20 11:52:24,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=637, Invalid=2119, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:52:24,963 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 1198 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1198 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:52:24,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1198 Valid, 598 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:52:24,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7302 states. [2022-11-20 11:52:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7302 to 5454. [2022-11-20 11:52:25,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 1.2259306803594352) internal successors, (6685), 5453 states have internal predecessors, (6685), 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) [2022-11-20 11:52:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 6685 transitions. [2022-11-20 11:52:26,007 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 6685 transitions. Word has length 61 [2022-11-20 11:52:26,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:52:26,008 INFO L495 AbstractCegarLoop]: Abstraction has 5454 states and 6685 transitions. [2022-11-20 11:52:26,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.125) internal successors, (164), 32 states have internal predecessors, (164), 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) [2022-11-20 11:52:26,008 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 6685 transitions. [2022-11-20 11:52:26,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 11:52:26,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:52:26,010 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:52:26,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:52:26,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:52:26,216 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:52:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:52:26,217 INFO L85 PathProgramCache]: Analyzing trace with hash -145481317, now seen corresponding path program 1 times [2022-11-20 11:52:26,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:52:26,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505904962] [2022-11-20 11:52:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:26,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:52:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:28,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:52:28,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505904962] [2022-11-20 11:52:28,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505904962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:52:28,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434882528] [2022-11-20 11:52:28,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:52:28,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:52:28,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:52:28,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:52:28,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:52:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:52:28,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:52:28,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:29,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:52:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:31,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434882528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:52:31,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:52:31,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 15] total 45 [2022-11-20 11:52:31,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495700343] [2022-11-20 11:52:31,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:52:31,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 11:52:31,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:52:31,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 11:52:31,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1808, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 11:52:31,303 INFO L87 Difference]: Start difference. First operand 5454 states and 6685 transitions. Second operand has 45 states, 45 states have (on average 3.7777777777777777) internal successors, (170), 45 states have internal predecessors, (170), 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) [2022-11-20 11:53:09,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:09,030 INFO L93 Difference]: Finished difference Result 17911 states and 21812 transitions. [2022-11-20 11:53:09,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-11-20 11:53:09,031 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.7777777777777777) internal successors, (170), 45 states have internal predecessors, (170), 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 62 [2022-11-20 11:53:09,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:09,073 INFO L225 Difference]: With dead ends: 17911 [2022-11-20 11:53:09,073 INFO L226 Difference]: Without dead ends: 15219 [2022-11-20 11:53:09,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13791 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=7642, Invalid=31364, Unknown=0, NotChecked=0, Total=39006 [2022-11-20 11:53:09,086 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 5129 mSDsluCounter, 3575 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5129 SdHoareTripleChecker+Valid, 3752 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:09,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5129 Valid, 3752 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 2135 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-20 11:53:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15219 states. [2022-11-20 11:53:10,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15219 to 4947. [2022-11-20 11:53:10,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4947 states, 4946 states have (on average 1.2217953902143146) internal successors, (6043), 4946 states have internal predecessors, (6043), 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) [2022-11-20 11:53:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4947 states to 4947 states and 6043 transitions. [2022-11-20 11:53:10,818 INFO L78 Accepts]: Start accepts. Automaton has 4947 states and 6043 transitions. Word has length 62 [2022-11-20 11:53:10,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:10,819 INFO L495 AbstractCegarLoop]: Abstraction has 4947 states and 6043 transitions. [2022-11-20 11:53:10,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.7777777777777777) internal successors, (170), 45 states have internal predecessors, (170), 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) [2022-11-20 11:53:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 4947 states and 6043 transitions. [2022-11-20 11:53:10,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 11:53:10,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:10,820 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:53:10,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 11:53:11,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:11,026 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:11,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:11,026 INFO L85 PathProgramCache]: Analyzing trace with hash 506213459, now seen corresponding path program 1 times [2022-11-20 11:53:11,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:11,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894964248] [2022-11-20 11:53:11,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:11,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:12,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:12,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894964248] [2022-11-20 11:53:12,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894964248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:53:12,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888454474] [2022-11-20 11:53:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:12,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:12,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:53:12,479 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:53:12,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:53:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:12,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:53:12,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:53:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:13,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:53:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:15,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888454474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:53:15,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:53:15,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 16] total 48 [2022-11-20 11:53:15,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118484398] [2022-11-20 11:53:15,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:53:15,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 11:53:15,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:53:15,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 11:53:15,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2073, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:53:15,976 INFO L87 Difference]: Start difference. First operand 4947 states and 6043 transitions. Second operand has 48 states, 48 states have (on average 3.4583333333333335) internal successors, (166), 48 states have internal predecessors, (166), 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) [2022-11-20 11:53:56,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:53:56,651 INFO L93 Difference]: Finished difference Result 25824 states and 31311 transitions. [2022-11-20 11:53:56,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-11-20 11:53:56,652 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.4583333333333335) internal successors, (166), 48 states have internal predecessors, (166), 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 62 [2022-11-20 11:53:56,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:53:56,698 INFO L225 Difference]: With dead ends: 25824 [2022-11-20 11:53:56,699 INFO L226 Difference]: Without dead ends: 23036 [2022-11-20 11:53:56,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20790 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=10200, Invalid=43392, Unknown=0, NotChecked=0, Total=53592 [2022-11-20 11:53:56,712 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 6358 mSDsluCounter, 4037 mSDsCounter, 0 mSdLazyCounter, 2621 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6358 SdHoareTripleChecker+Valid, 4232 SdHoareTripleChecker+Invalid, 2900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 2621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:53:56,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6358 Valid, 4232 Invalid, 2900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 2621 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-20 11:53:56,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23036 states. [2022-11-20 11:53:58,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23036 to 4040. [2022-11-20 11:53:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4040 states, 4039 states have (on average 1.2203515721713296) internal successors, (4929), 4039 states have internal predecessors, (4929), 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) [2022-11-20 11:53:58,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4040 states to 4040 states and 4929 transitions. [2022-11-20 11:53:58,205 INFO L78 Accepts]: Start accepts. Automaton has 4040 states and 4929 transitions. Word has length 62 [2022-11-20 11:53:58,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:53:58,205 INFO L495 AbstractCegarLoop]: Abstraction has 4040 states and 4929 transitions. [2022-11-20 11:53:58,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.4583333333333335) internal successors, (166), 48 states have internal predecessors, (166), 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) [2022-11-20 11:53:58,205 INFO L276 IsEmpty]: Start isEmpty. Operand 4040 states and 4929 transitions. [2022-11-20 11:53:58,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 11:53:58,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:53:58,206 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 11:53:58,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:53:58,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:58,412 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:53:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:53:58,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1489241715, now seen corresponding path program 1 times [2022-11-20 11:53:58,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:53:58,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946211681] [2022-11-20 11:53:58,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:58,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:53:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:53:59,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:53:59,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946211681] [2022-11-20 11:53:59,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946211681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:53:59,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918018904] [2022-11-20 11:53:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:53:59,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:53:59,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:53:59,168 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:53:59,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:53:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:53:59,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 11:53:59,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:03,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:06,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918018904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:06,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:06,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 15] total 41 [2022-11-20 11:54:06,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914806886] [2022-11-20 11:54:06,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:06,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:54:06,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:06,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:54:06,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 11:54:06,262 INFO L87 Difference]: Start difference. First operand 4040 states and 4929 transitions. Second operand has 41 states, 41 states have (on average 3.951219512195122) internal successors, (162), 41 states have internal predecessors, (162), 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) [2022-11-20 11:54:33,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:33,029 INFO L93 Difference]: Finished difference Result 8874 states and 10746 transitions. [2022-11-20 11:54:33,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-20 11:54:33,030 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.951219512195122) internal successors, (162), 41 states have internal predecessors, (162), 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 64 [2022-11-20 11:54:33,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:33,042 INFO L225 Difference]: With dead ends: 8874 [2022-11-20 11:54:33,042 INFO L226 Difference]: Without dead ends: 6362 [2022-11-20 11:54:33,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4435 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=3147, Invalid=10895, Unknown=0, NotChecked=0, Total=14042 [2022-11-20 11:54:33,048 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 3188 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3188 SdHoareTripleChecker+Valid, 2084 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:33,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3188 Valid, 2084 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 11:54:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6362 states. [2022-11-20 11:54:34,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6362 to 2316. [2022-11-20 11:54:34,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 1.2250539956803457) internal successors, (2836), 2315 states have internal predecessors, (2836), 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) [2022-11-20 11:54:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 2836 transitions. [2022-11-20 11:54:34,020 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 2836 transitions. Word has length 64 [2022-11-20 11:54:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:34,021 INFO L495 AbstractCegarLoop]: Abstraction has 2316 states and 2836 transitions. [2022-11-20 11:54:34,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.951219512195122) internal successors, (162), 41 states have internal predecessors, (162), 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) [2022-11-20 11:54:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 2836 transitions. [2022-11-20 11:54:34,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 11:54:34,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:34,023 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-11-20 11:54:34,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:54:34,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:34,229 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:34,230 INFO L85 PathProgramCache]: Analyzing trace with hash 960459262, now seen corresponding path program 1 times [2022-11-20 11:54:34,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:34,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994911578] [2022-11-20 11:54:34,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:34,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:35,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:35,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994911578] [2022-11-20 11:54:35,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994911578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:35,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42003286] [2022-11-20 11:54:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:35,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:35,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:35,093 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:35,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:54:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:35,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:54:35,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 24 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:36,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:38,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42003286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:38,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:38,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-11-20 11:54:38,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047691797] [2022-11-20 11:54:38,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:38,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 11:54:38,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:38,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 11:54:38,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:54:38,451 INFO L87 Difference]: Start difference. First operand 2316 states and 2836 transitions. Second operand has 26 states, 26 states have (on average 8.73076923076923) internal successors, (227), 25 states have internal predecessors, (227), 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) [2022-11-20 11:54:40,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:40,360 INFO L93 Difference]: Finished difference Result 3800 states and 4649 transitions. [2022-11-20 11:54:40,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:54:40,363 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.73076923076923) internal successors, (227), 25 states have internal predecessors, (227), 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 102 [2022-11-20 11:54:40,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:40,368 INFO L225 Difference]: With dead ends: 3800 [2022-11-20 11:54:40,368 INFO L226 Difference]: Without dead ends: 2616 [2022-11-20 11:54:40,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=381, Invalid=1179, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 11:54:40,371 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 919 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:40,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 573 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:54:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2022-11-20 11:54:41,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2316. [2022-11-20 11:54:41,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 1.2155507559395249) internal successors, (2814), 2315 states have internal predecessors, (2814), 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) [2022-11-20 11:54:41,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 2814 transitions. [2022-11-20 11:54:41,742 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 2814 transitions. Word has length 102 [2022-11-20 11:54:41,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:41,742 INFO L495 AbstractCegarLoop]: Abstraction has 2316 states and 2814 transitions. [2022-11-20 11:54:41,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.73076923076923) internal successors, (227), 25 states have internal predecessors, (227), 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) [2022-11-20 11:54:41,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 2814 transitions. [2022-11-20 11:54:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 11:54:41,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:41,745 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:54:41,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 11:54:41,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 11:54:41,950 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:41,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:41,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1939597936, now seen corresponding path program 1 times [2022-11-20 11:54:41,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:41,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783658535] [2022-11-20 11:54:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:41,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:42,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:42,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783658535] [2022-11-20 11:54:42,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783658535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:42,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297515515] [2022-11-20 11:54:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:42,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:42,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:42,709 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:42,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:54:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:42,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:54:42,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 27 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:43,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:54:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:45,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297515515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:54:45,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:54:45,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-11-20 11:54:45,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187459830] [2022-11-20 11:54:45,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:54:45,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 11:54:45,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:54:45,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 11:54:45,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:54:45,880 INFO L87 Difference]: Start difference. First operand 2316 states and 2814 transitions. Second operand has 29 states, 29 states have (on average 8.482758620689655) internal successors, (246), 28 states have internal predecessors, (246), 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) [2022-11-20 11:54:51,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:54:51,952 INFO L93 Difference]: Finished difference Result 12253 states and 14995 transitions. [2022-11-20 11:54:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 11:54:51,953 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 8.482758620689655) internal successors, (246), 28 states have internal predecessors, (246), 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 102 [2022-11-20 11:54:51,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:54:51,968 INFO L225 Difference]: With dead ends: 12253 [2022-11-20 11:54:51,968 INFO L226 Difference]: Without dead ends: 10241 [2022-11-20 11:54:51,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=720, Invalid=2036, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:54:51,973 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 1401 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:54:51,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1401 Valid, 955 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:54:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2022-11-20 11:54:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 4826. [2022-11-20 11:54:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.206217616580311) internal successors, (5820), 4825 states have internal predecessors, (5820), 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) [2022-11-20 11:54:54,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 5820 transitions. [2022-11-20 11:54:54,220 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 5820 transitions. Word has length 102 [2022-11-20 11:54:54,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:54:54,221 INFO L495 AbstractCegarLoop]: Abstraction has 4826 states and 5820 transitions. [2022-11-20 11:54:54,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.482758620689655) internal successors, (246), 28 states have internal predecessors, (246), 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) [2022-11-20 11:54:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 5820 transitions. [2022-11-20 11:54:54,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 11:54:54,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:54:54,223 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:54:54,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 11:54:54,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 11:54:54,429 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:54:54,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:54:54,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1433223824, now seen corresponding path program 1 times [2022-11-20 11:54:54,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:54:54,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022803177] [2022-11-20 11:54:54,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:54,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:54:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:54:55,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:54:55,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022803177] [2022-11-20 11:54:55,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022803177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:54:55,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407547608] [2022-11-20 11:54:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:54:55,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:54:55,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:55,683 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:54:55,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0fd3136-6902-4170-bc30-aa05458e29bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:54:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:54:55,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-20 11:54:55,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:54:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 11:54:58,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:56:31,808 WARN L233 SmtUtils]: Spent 1.29m on a formula simplification. DAG size of input: 10297 DAG size of output: 10229 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)