./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/egcd2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/egcd2-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8 --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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --- 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-2329fc7 [2022-12-13 14:37:07,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:37:07,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:37:07,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:37:07,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:37:07,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:37:07,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:37:07,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:37:07,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:37:07,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:37:07,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:37:07,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:37:07,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:37:07,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:37:07,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:37:07,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:37:07,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:37:07,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:37:07,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:37:07,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:37:07,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:37:07,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:37:07,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:37:07,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:37:07,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:37:07,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:37:07,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:37:07,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:37:07,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:37:07,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:37:07,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:37:07,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:37:07,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:37:07,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:37:07,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:37:07,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:37:07,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:37:07,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:37:07,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:37:07,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:37:07,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:37:07,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 14:37:07,377 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:37:07,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:37:07,382 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:37:07,382 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:37:07,383 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:37:07,383 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:37:07,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:37:07,383 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:37:07,384 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:37:07,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:37:07,384 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:37:07,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:37:07,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:37:07,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:37:07,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 14:37:07,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:37:07,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 14:37:07,384 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:37:07,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 14:37:07,385 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:37:07,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 14:37:07,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:37:07,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:37:07,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:37:07,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:37:07,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:37:07,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:37:07,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 14:37:07,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:37:07,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:37:07,386 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:37:07,386 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 14:37:07,386 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:37:07,386 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:37:07,386 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:37:07,386 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 [2022-12-13 14:37:07,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:37:07,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:37:07,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:37:07,568 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:37:07,569 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:37:07,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2022-12-13 14:37:10,270 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:37:10,396 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:37:10,397 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2022-12-13 14:37:10,402 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/data/ebebdb917/7bec6c0913224242b05bf6390249ef53/FLAG84a692289 [2022-12-13 14:37:10,416 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/data/ebebdb917/7bec6c0913224242b05bf6390249ef53 [2022-12-13 14:37:10,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:37:10,420 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:37:10,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:37:10,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:37:10,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:37:10,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:37:10" (1/1) ... [2022-12-13 14:37:10,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230a7fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:10, skipping insertion in model container [2022-12-13 14:37:10,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:37:10" (1/1) ... [2022-12-13 14:37:10,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:37:10,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:37:10,550 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_ba4758ba-261b-4c79-92c8-7a28cf4fff57/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2022-12-13 14:37:10,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:37:10,571 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:37:10,579 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_ba4758ba-261b-4c79-92c8-7a28cf4fff57/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2022-12-13 14:37:10,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:37:10,595 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:37:10,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:10 WrapperNode [2022-12-13 14:37:10,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:37:10,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:37:10,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:37:10,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:37:10,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:10" (1/1) ... [2022-12-13 14:37:10,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:10" (1/1) ... [2022-12-13 14:37:10,619 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75 [2022-12-13 14:37:10,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:37:10,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:37:10,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:37:10,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:37:10,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:10" (1/1) ... [2022-12-13 14:37:10,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:10" (1/1) ... [2022-12-13 14:37:10,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:10" (1/1) ... [2022-12-13 14:37:10,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:10" (1/1) ... [2022-12-13 14:37:10,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:10" (1/1) ... [2022-12-13 14:37:10,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:10" (1/1) ... [2022-12-13 14:37:10,634 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:10" (1/1) ... [2022-12-13 14:37:10,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:10" (1/1) ... [2022-12-13 14:37:10,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:37:10,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:37:10,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:37:10,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:37:10,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:10" (1/1) ... [2022-12-13 14:37:10,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:37:10,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:10,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:37:10,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:37:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:37:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 14:37:10,696 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 14:37:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:37:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:37:10,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:37:10,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 14:37:10,696 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 14:37:10,750 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:37:10,751 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:37:10,868 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:37:10,873 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:37:10,873 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 14:37:10,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:37:10 BoogieIcfgContainer [2022-12-13 14:37:10,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:37:10,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:37:10,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:37:10,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:37:10,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:37:10" (1/3) ... [2022-12-13 14:37:10,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb42323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:37:10, skipping insertion in model container [2022-12-13 14:37:10,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:37:10" (2/3) ... [2022-12-13 14:37:10,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb42323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:37:10, skipping insertion in model container [2022-12-13 14:37:10,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:37:10" (3/3) ... [2022-12-13 14:37:10,881 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2022-12-13 14:37:10,895 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:37:10,895 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 14:37:10,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:37:10,935 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;@2b11f23b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:37:10,936 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 14:37:10,939 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 14:37:10,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 14:37:10,945 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:37:10,945 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:37:10,945 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:37:10,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:10,949 INFO L85 PathProgramCache]: Analyzing trace with hash 223354930, now seen corresponding path program 1 times [2022-12-13 14:37:10,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:10,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645750163] [2022-12-13 14:37:10,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:10,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:11,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:11,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645750163] [2022-12-13 14:37:11,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 14:37:11,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803276543] [2022-12-13 14:37:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:11,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:11,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:11,047 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:11,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:37:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:11,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 14:37:11,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 14:37:11,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:37:11,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803276543] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:37:11,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:37:11,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:37:11,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54491827] [2022-12-13 14:37:11,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:37:11,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 14:37:11,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:11,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 14:37:11,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 14:37:11,171 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 14:37:11,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:37:11,189 INFO L93 Difference]: Finished difference Result 61 states and 100 transitions. [2022-12-13 14:37:11,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 14:37:11,191 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-12-13 14:37:11,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:37:11,196 INFO L225 Difference]: With dead ends: 61 [2022-12-13 14:37:11,197 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 14:37:11,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 14:37:11,201 INFO L413 NwaCegarLoop]: 41 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, 41 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 [2022-12-13 14:37:11,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:37:11,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 14:37:11,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-13 14:37:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 14:37:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-12-13 14:37:11,231 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 28 [2022-12-13 14:37:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:37:11,231 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-12-13 14:37:11,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 14:37:11,231 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-12-13 14:37:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 14:37:11,233 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:37:11,233 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:37:11,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:37:11,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:11,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:37:11,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:11,438 INFO L85 PathProgramCache]: Analyzing trace with hash 727709964, now seen corresponding path program 1 times [2022-12-13 14:37:11,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:11,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671923216] [2022-12-13 14:37:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:11,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:11,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:37:11,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331697098] [2022-12-13 14:37:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:11,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:11,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:11,491 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:11,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:37:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:11,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 14:37:11,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 14:37:11,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:37:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 14:37:11,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:11,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671923216] [2022-12-13 14:37:11,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:37:11,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331697098] [2022-12-13 14:37:11,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331697098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:37:11,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:37:11,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-12-13 14:37:11,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534491571] [2022-12-13 14:37:11,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:37:11,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:37:11,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:11,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:37:11,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:37:11,866 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 14:37:11,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:37:11,951 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-12-13 14:37:11,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:37:11,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-12-13 14:37:11,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:37:11,952 INFO L225 Difference]: With dead ends: 45 [2022-12-13 14:37:11,952 INFO L226 Difference]: Without dead ends: 37 [2022-12-13 14:37:11,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:37:11,954 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:37:11,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 99 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:37:11,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-13 14:37:11,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-12-13 14:37:11,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 14:37:11,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-12-13 14:37:11,960 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 29 [2022-12-13 14:37:11,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:37:11,960 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-12-13 14:37:11,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 14:37:11,961 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-12-13 14:37:11,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 14:37:11,961 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:37:11,961 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:37:11,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:37:12,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-13 14:37:12,163 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:37:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1088429638, now seen corresponding path program 1 times [2022-12-13 14:37:12,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:12,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428181372] [2022-12-13 14:37:12,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:12,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:12,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:37:12,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959337488] [2022-12-13 14:37:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:12,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:12,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:12,206 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:12,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:37:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:12,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 14:37:12,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 14:37:12,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:37:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 14:37:12,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:12,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428181372] [2022-12-13 14:37:12,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:37:12,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959337488] [2022-12-13 14:37:12,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959337488] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 14:37:12,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:37:12,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-12-13 14:37:12,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82099418] [2022-12-13 14:37:12,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:37:12,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:37:12,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:12,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:37:12,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-13 14:37:12,458 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 14:37:12,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:37:12,502 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-12-13 14:37:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:37:12,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-12-13 14:37:12,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:37:12,504 INFO L225 Difference]: With dead ends: 36 [2022-12-13 14:37:12,504 INFO L226 Difference]: Without dead ends: 34 [2022-12-13 14:37:12,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:37:12,506 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:37:12,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 100 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:37:12,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-13 14:37:12,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-12-13 14:37:12,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 14:37:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-12-13 14:37:12,514 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 30 [2022-12-13 14:37:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:37:12,515 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-12-13 14:37:12,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 14:37:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-12-13 14:37:12,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 14:37:12,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:37:12,517 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:37:12,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:37:12,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:12,719 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:37:12,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:12,721 INFO L85 PathProgramCache]: Analyzing trace with hash 161014808, now seen corresponding path program 1 times [2022-12-13 14:37:12,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:12,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423803519] [2022-12-13 14:37:12,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:12,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:12,754 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:37:12,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720579197] [2022-12-13 14:37:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:12,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:12,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:12,759 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:12,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:37:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:12,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 14:37:12,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 14:37:13,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:37:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 14:37:13,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:13,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423803519] [2022-12-13 14:37:13,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:37:13,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720579197] [2022-12-13 14:37:13,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720579197] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 14:37:13,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:37:13,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-12-13 14:37:13,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993056196] [2022-12-13 14:37:13,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:37:13,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:37:13,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:13,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:37:13,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:37:13,139 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 14:37:13,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:37:13,191 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-12-13 14:37:13,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:37:13,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2022-12-13 14:37:13,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:37:13,192 INFO L225 Difference]: With dead ends: 47 [2022-12-13 14:37:13,192 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 14:37:13,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-12-13 14:37:13,193 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:37:13,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:37:13,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 14:37:13,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-12-13 14:37:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 14:37:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-12-13 14:37:13,202 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 35 [2022-12-13 14:37:13,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:37:13,202 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-12-13 14:37:13,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 14:37:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-12-13 14:37:13,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 14:37:13,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:37:13,204 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:37:13,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 14:37:13,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:13,405 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:37:13,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:13,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2062939834, now seen corresponding path program 1 times [2022-12-13 14:37:13,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:13,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436861071] [2022-12-13 14:37:13,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:13,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:13,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:37:13,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170638498] [2022-12-13 14:37:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:13,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:13,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:13,430 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:13,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:37:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:13,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 14:37:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 14:37:13,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:37:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 14:37:13,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:13,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436861071] [2022-12-13 14:37:13,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:37:13,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170638498] [2022-12-13 14:37:13,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170638498] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 14:37:13,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:37:13,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2022-12-13 14:37:13,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040204535] [2022-12-13 14:37:13,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:37:13,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:37:13,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:13,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:37:13,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-12-13 14:37:13,905 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 14:37:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:37:13,957 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2022-12-13 14:37:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:37:13,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-12-13 14:37:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:37:13,959 INFO L225 Difference]: With dead ends: 51 [2022-12-13 14:37:13,959 INFO L226 Difference]: Without dead ends: 49 [2022-12-13 14:37:13,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-12-13 14:37:13,960 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:37:13,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 115 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:37:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-13 14:37:13,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-12-13 14:37:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 14:37:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2022-12-13 14:37:13,969 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 40 [2022-12-13 14:37:13,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:37:13,969 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2022-12-13 14:37:13,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 14:37:13,969 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2022-12-13 14:37:13,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 14:37:13,970 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:37:13,970 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:37:13,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 14:37:14,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:14,170 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:37:14,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:14,171 INFO L85 PathProgramCache]: Analyzing trace with hash -98301800, now seen corresponding path program 1 times [2022-12-13 14:37:14,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:14,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388939368] [2022-12-13 14:37:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:14,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:14,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:37:14,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314887046] [2022-12-13 14:37:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:14,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:14,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:14,181 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:14,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 14:37:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:14,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 14:37:14,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 14:37:14,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:37:14,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:14,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388939368] [2022-12-13 14:37:14,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:37:14,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314887046] [2022-12-13 14:37:14,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314887046] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:37:14,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:37:14,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-12-13 14:37:14,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849247128] [2022-12-13 14:37:14,439 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:37:14,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:37:14,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:14,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:37:14,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-13 14:37:14,440 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 14:37:14,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:37:14,530 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-12-13 14:37:14,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:37:14,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-12-13 14:37:14,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:37:14,531 INFO L225 Difference]: With dead ends: 55 [2022-12-13 14:37:14,532 INFO L226 Difference]: Without dead ends: 53 [2022-12-13 14:37:14,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-13 14:37:14,533 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:37:14,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 95 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:37:14,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-13 14:37:14,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-12-13 14:37:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 14:37:14,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-12-13 14:37:14,546 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 45 [2022-12-13 14:37:14,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:37:14,546 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-12-13 14:37:14,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 14:37:14,547 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-12-13 14:37:14,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 14:37:14,548 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:37:14,548 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2022-12-13 14:37:14,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 14:37:14,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 14:37:14,750 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:37:14,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:14,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1721617041, now seen corresponding path program 1 times [2022-12-13 14:37:14,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:14,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136762485] [2022-12-13 14:37:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:14,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:14,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:37:14,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468380391] [2022-12-13 14:37:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:14,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:14,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:14,786 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:14,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 14:37:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:14,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:37:14,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-13 14:37:14,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:37:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-13 14:37:15,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:15,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136762485] [2022-12-13 14:37:15,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:37:15,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468380391] [2022-12-13 14:37:15,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468380391] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:37:15,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:37:15,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-12-13 14:37:15,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303537969] [2022-12-13 14:37:15,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:37:15,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:37:15,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:15,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:37:15,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:37:15,061 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-13 14:37:15,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:37:15,212 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2022-12-13 14:37:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 14:37:15,213 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2022-12-13 14:37:15,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:37:15,214 INFO L225 Difference]: With dead ends: 99 [2022-12-13 14:37:15,215 INFO L226 Difference]: Without dead ends: 91 [2022-12-13 14:37:15,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-13 14:37:15,216 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 36 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:37:15,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 180 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:37:15,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-13 14:37:15,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2022-12-13 14:37:15,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 30 states have call successors, (30), 6 states have call predecessors, (30), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-12-13 14:37:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 113 transitions. [2022-12-13 14:37:15,239 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 113 transitions. Word has length 54 [2022-12-13 14:37:15,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:37:15,240 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 113 transitions. [2022-12-13 14:37:15,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-13 14:37:15,240 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 113 transitions. [2022-12-13 14:37:15,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 14:37:15,241 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:37:15,241 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2022-12-13 14:37:15,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 14:37:15,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:15,442 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:37:15,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:15,443 INFO L85 PathProgramCache]: Analyzing trace with hash -653850053, now seen corresponding path program 1 times [2022-12-13 14:37:15,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:15,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795306830] [2022-12-13 14:37:15,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:15,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:15,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:37:15,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424335598] [2022-12-13 14:37:15,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:15,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:15,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:15,454 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:15,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 14:37:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:15,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 14:37:15,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 14:37:15,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:37:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-13 14:37:15,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:15,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795306830] [2022-12-13 14:37:15,748 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:37:15,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424335598] [2022-12-13 14:37:15,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424335598] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:37:15,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:37:15,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-12-13 14:37:15,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318404164] [2022-12-13 14:37:15,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:37:15,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 14:37:15,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:15,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 14:37:15,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:37:15,750 INFO L87 Difference]: Start difference. First operand 82 states and 113 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-12-13 14:37:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:37:16,039 INFO L93 Difference]: Finished difference Result 125 states and 178 transitions. [2022-12-13 14:37:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 14:37:16,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 60 [2022-12-13 14:37:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:37:16,042 INFO L225 Difference]: With dead ends: 125 [2022-12-13 14:37:16,042 INFO L226 Difference]: Without dead ends: 121 [2022-12-13 14:37:16,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-12-13 14:37:16,043 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 32 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:37:16,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 199 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:37:16,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-13 14:37:16,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2022-12-13 14:37:16,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 32 states have call successors, (32), 7 states have call predecessors, (32), 7 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-12-13 14:37:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 121 transitions. [2022-12-13 14:37:16,073 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 121 transitions. Word has length 60 [2022-12-13 14:37:16,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:37:16,073 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 121 transitions. [2022-12-13 14:37:16,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-12-13 14:37:16,074 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 121 transitions. [2022-12-13 14:37:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 14:37:16,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:37:16,074 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2022-12-13 14:37:16,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 14:37:16,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:16,275 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:37:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:16,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1044201731, now seen corresponding path program 2 times [2022-12-13 14:37:16,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:16,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246400797] [2022-12-13 14:37:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:16,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:16,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:37:16,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481224296] [2022-12-13 14:37:16,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:37:16,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:16,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:16,284 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:16,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 14:37:16,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:37:16,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:37:16,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 14:37:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 14:37:17,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:37:21,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:21,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246400797] [2022-12-13 14:37:21,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:37:21,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481224296] [2022-12-13 14:37:21,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481224296] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:37:21,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:37:21,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-12-13 14:37:21,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206879151] [2022-12-13 14:37:21,810 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:37:21,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 14:37:21,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:21,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 14:37:21,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=317, Unknown=1, NotChecked=0, Total=380 [2022-12-13 14:37:21,812 INFO L87 Difference]: Start difference. First operand 89 states and 121 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-12-13 14:37:23,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 14:37:25,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:37:25,481 INFO L93 Difference]: Finished difference Result 121 states and 160 transitions. [2022-12-13 14:37:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 14:37:25,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 65 [2022-12-13 14:37:25,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:37:25,482 INFO L225 Difference]: With dead ends: 121 [2022-12-13 14:37:25,482 INFO L226 Difference]: Without dead ends: 119 [2022-12-13 14:37:25,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=101, Invalid=498, Unknown=1, NotChecked=0, Total=600 [2022-12-13 14:37:25,483 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:37:25,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 112 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 390 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-12-13 14:37:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-12-13 14:37:25,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-12-13 14:37:25,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 67 states have internal predecessors, (76), 40 states have call successors, (40), 10 states have call predecessors, (40), 10 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2022-12-13 14:37:25,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2022-12-13 14:37:25,506 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 65 [2022-12-13 14:37:25,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:37:25,506 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2022-12-13 14:37:25,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-12-13 14:37:25,506 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2022-12-13 14:37:25,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-13 14:37:25,507 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:37:25,507 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2022-12-13 14:37:25,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 14:37:25,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:25,709 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:37:25,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:25,711 INFO L85 PathProgramCache]: Analyzing trace with hash 635379451, now seen corresponding path program 3 times [2022-12-13 14:37:25,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:25,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618199243] [2022-12-13 14:37:25,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:25,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:25,736 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:37:25,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124371210] [2022-12-13 14:37:25,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:37:25,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:25,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:25,741 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:25,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 14:37:25,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 14:37:25,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:37:25,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 14:37:25,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 37 proven. 14 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-13 14:37:27,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:37:30,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:30,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618199243] [2022-12-13 14:37:30,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:37:30,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124371210] [2022-12-13 14:37:30,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124371210] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:37:30,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:37:30,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-12-13 14:37:30,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805525111] [2022-12-13 14:37:30,538 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:37:30,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 14:37:30,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:30,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 14:37:30,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-12-13 14:37:30,539 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-13 14:37:31,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:37:31,738 INFO L93 Difference]: Finished difference Result 125 states and 163 transitions. [2022-12-13 14:37:31,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 14:37:31,739 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 70 [2022-12-13 14:37:31,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:37:31,739 INFO L225 Difference]: With dead ends: 125 [2022-12-13 14:37:31,739 INFO L226 Difference]: Without dead ends: 123 [2022-12-13 14:37:31,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-12-13 14:37:31,740 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 14:37:31,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 122 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 14:37:31,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-12-13 14:37:31,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2022-12-13 14:37:31,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.161764705882353) internal successors, (79), 70 states have internal predecessors, (79), 40 states have call successors, (40), 11 states have call predecessors, (40), 11 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2022-12-13 14:37:31,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 158 transitions. [2022-12-13 14:37:31,766 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 158 transitions. Word has length 70 [2022-12-13 14:37:31,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:37:31,766 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 158 transitions. [2022-12-13 14:37:31,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-13 14:37:31,766 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 158 transitions. [2022-12-13 14:37:31,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-13 14:37:31,767 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:37:31,767 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2022-12-13 14:37:31,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 14:37:31,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:31,969 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:37:31,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:31,971 INFO L85 PathProgramCache]: Analyzing trace with hash -375209714, now seen corresponding path program 1 times [2022-12-13 14:37:31,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:31,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653446790] [2022-12-13 14:37:31,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:31,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:31,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:37:31,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328603543] [2022-12-13 14:37:31,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:31,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:31,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:31,999 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:32,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 14:37:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:32,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 14:37:32,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-12-13 14:37:32,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:37:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-12-13 14:37:32,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:32,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653446790] [2022-12-13 14:37:32,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:37:32,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328603543] [2022-12-13 14:37:32,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328603543] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:37:32,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:37:32,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2022-12-13 14:37:32,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017629109] [2022-12-13 14:37:32,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:37:32,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 14:37:32,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:32,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 14:37:32,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-12-13 14:37:32,948 INFO L87 Difference]: Start difference. First operand 120 states and 158 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-12-13 14:37:40,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:37:40,912 INFO L93 Difference]: Finished difference Result 205 states and 290 transitions. [2022-12-13 14:37:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 14:37:40,912 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 76 [2022-12-13 14:37:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:37:40,914 INFO L225 Difference]: With dead ends: 205 [2022-12-13 14:37:40,914 INFO L226 Difference]: Without dead ends: 201 [2022-12-13 14:37:40,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 14:37:40,915 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 90 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:37:40,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 382 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-12-13 14:37:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-13 14:37:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2022-12-13 14:37:40,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 105 states have (on average 1.2) internal successors, (126), 106 states have internal predecessors, (126), 77 states have call successors, (77), 14 states have call predecessors, (77), 14 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-12-13 14:37:40,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 279 transitions. [2022-12-13 14:37:40,974 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 279 transitions. Word has length 76 [2022-12-13 14:37:40,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:37:40,974 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 279 transitions. [2022-12-13 14:37:40,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-12-13 14:37:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 279 transitions. [2022-12-13 14:37:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-13 14:37:40,975 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:37:40,975 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:37:40,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 14:37:41,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 14:37:41,177 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:37:41,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:41,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1119373286, now seen corresponding path program 4 times [2022-12-13 14:37:41,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:41,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844239406] [2022-12-13 14:37:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:41,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:41,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:37:41,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887686028] [2022-12-13 14:37:41,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:37:41,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:41,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:41,193 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:41,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 14:37:41,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:37:41,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:37:41,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 14:37:41,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-12-13 14:37:41,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:37:41,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:41,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844239406] [2022-12-13 14:37:41,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:37:41,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887686028] [2022-12-13 14:37:41,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887686028] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:37:41,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:37:41,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:37:41,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655575624] [2022-12-13 14:37:41,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:37:41,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:37:41,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:41,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:37:41,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:37:41,268 INFO L87 Difference]: Start difference. First operand 197 states and 279 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-13 14:37:41,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:37:41,369 INFO L93 Difference]: Finished difference Result 250 states and 351 transitions. [2022-12-13 14:37:41,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:37:41,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 90 [2022-12-13 14:37:41,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:37:41,370 INFO L225 Difference]: With dead ends: 250 [2022-12-13 14:37:41,371 INFO L226 Difference]: Without dead ends: 178 [2022-12-13 14:37:41,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:37:41,371 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:37:41,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 125 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:37:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-13 14:37:41,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2022-12-13 14:37:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 89 states have internal predecessors, (101), 61 states have call successors, (61), 14 states have call predecessors, (61), 14 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2022-12-13 14:37:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 222 transitions. [2022-12-13 14:37:41,414 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 222 transitions. Word has length 90 [2022-12-13 14:37:41,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:37:41,414 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 222 transitions. [2022-12-13 14:37:41,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-13 14:37:41,415 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 222 transitions. [2022-12-13 14:37:41,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-13 14:37:41,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:37:41,415 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:37:41,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 14:37:41,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 14:37:41,617 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:37:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:37:41,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1261079706, now seen corresponding path program 1 times [2022-12-13 14:37:41,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:37:41,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260610107] [2022-12-13 14:37:41,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:41,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:37:41,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:37:41,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470153967] [2022-12-13 14:37:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:37:41,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:37:41,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:37:41,645 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:37:41,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 14:37:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:37:41,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 14:37:41,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:37:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-12-13 14:37:42,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:37:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-12-13 14:37:43,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:37:43,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260610107] [2022-12-13 14:37:43,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:37:43,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470153967] [2022-12-13 14:37:43,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470153967] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:37:43,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:37:43,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2022-12-13 14:37:43,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674459310] [2022-12-13 14:37:43,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:37:43,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 14:37:43,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:37:43,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 14:37:43,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-12-13 14:37:43,606 INFO L87 Difference]: Start difference. First operand 164 states and 222 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-12-13 14:37:46,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:38:06,055 WARN L233 SmtUtils]: Spent 18.29s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:38:16,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:38:25,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:38:29,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:38:33,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:38:36,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:38:36,511 INFO L93 Difference]: Finished difference Result 206 states and 282 transitions. [2022-12-13 14:38:36,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 14:38:36,512 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 92 [2022-12-13 14:38:36,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:38:36,512 INFO L225 Difference]: With dead ends: 206 [2022-12-13 14:38:36,513 INFO L226 Difference]: Without dead ends: 204 [2022-12-13 14:38:36,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=334, Invalid=1223, Unknown=3, NotChecked=0, Total=1560 [2022-12-13 14:38:36,513 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 87 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 135 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2022-12-13 14:38:36,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 177 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1051 Invalid, 4 Unknown, 0 Unchecked, 20.9s Time] [2022-12-13 14:38:36,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-12-13 14:38:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2022-12-13 14:38:36,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 107 states have internal predecessors, (120), 73 states have call successors, (73), 15 states have call predecessors, (73), 15 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2022-12-13 14:38:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 265 transitions. [2022-12-13 14:38:36,597 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 265 transitions. Word has length 92 [2022-12-13 14:38:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:38:36,597 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 265 transitions. [2022-12-13 14:38:36,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-12-13 14:38:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 265 transitions. [2022-12-13 14:38:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-13 14:38:36,598 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:38:36,598 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:38:36,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 14:38:36,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:38:36,799 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:38:36,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:38:36,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1880436805, now seen corresponding path program 2 times [2022-12-13 14:38:36,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:38:36,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214329501] [2022-12-13 14:38:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:38:36,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:38:36,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:38:36,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535690514] [2022-12-13 14:38:36,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:38:36,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:38:36,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:38:36,824 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:38:36,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 14:38:36,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:38:36,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:38:36,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 14:38:36,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:38:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-12-13 14:38:37,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:38:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-12-13 14:38:38,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:38:38,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214329501] [2022-12-13 14:38:38,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:38:38,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535690514] [2022-12-13 14:38:38,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535690514] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:38:38,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:38:38,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2022-12-13 14:38:38,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099240093] [2022-12-13 14:38:38,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:38:38,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:38:38,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:38:38,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:38:38,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-12-13 14:38:38,447 INFO L87 Difference]: Start difference. First operand 194 states and 265 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 12 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 12 states have call successors, (36) [2022-12-13 14:39:05,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:39:05,848 INFO L93 Difference]: Finished difference Result 299 states and 426 transitions. [2022-12-13 14:39:05,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 14:39:05,849 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 12 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 12 states have call successors, (36) Word has length 109 [2022-12-13 14:39:05,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:39:05,851 INFO L225 Difference]: With dead ends: 299 [2022-12-13 14:39:05,851 INFO L226 Difference]: Without dead ends: 297 [2022-12-13 14:39:05,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=456, Invalid=1800, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 14:39:05,852 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 104 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:39:05,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 447 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2022-12-13 14:39:05,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-12-13 14:39:06,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 263. [2022-12-13 14:39:06,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 139 states have (on average 1.1654676258992807) internal successors, (162), 141 states have internal predecessors, (162), 105 states have call successors, (105), 18 states have call predecessors, (105), 18 states have return successors, (104), 103 states have call predecessors, (104), 104 states have call successors, (104) [2022-12-13 14:39:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 371 transitions. [2022-12-13 14:39:06,031 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 371 transitions. Word has length 109 [2022-12-13 14:39:06,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:39:06,031 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 371 transitions. [2022-12-13 14:39:06,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 12 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 12 states have call successors, (36) [2022-12-13 14:39:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 371 transitions. [2022-12-13 14:39:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-13 14:39:06,033 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:39:06,033 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:39:06,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 14:39:06,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 14:39:06,234 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:39:06,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:39:06,235 INFO L85 PathProgramCache]: Analyzing trace with hash 468383399, now seen corresponding path program 3 times [2022-12-13 14:39:06,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:39:06,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328917000] [2022-12-13 14:39:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:39:06,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:39:06,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:39:06,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418238609] [2022-12-13 14:39:06,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:39:06,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:39:06,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:39:06,260 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:39:06,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 14:39:06,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 14:39:06,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:39:06,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-13 14:39:06,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:39:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 75 proven. 38 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-12-13 14:39:06,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:39:07,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:39:07,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328917000] [2022-12-13 14:39:07,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:39:07,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418238609] [2022-12-13 14:39:07,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418238609] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:39:07,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:39:07,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-12-13 14:39:07,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766658025] [2022-12-13 14:39:07,093 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:39:07,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 14:39:07,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:39:07,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 14:39:07,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-12-13 14:39:07,094 INFO L87 Difference]: Start difference. First operand 263 states and 371 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-12-13 14:39:08,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:39:08,161 INFO L93 Difference]: Finished difference Result 303 states and 422 transitions. [2022-12-13 14:39:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 14:39:08,162 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 112 [2022-12-13 14:39:08,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:39:08,163 INFO L225 Difference]: With dead ends: 303 [2022-12-13 14:39:08,163 INFO L226 Difference]: Without dead ends: 301 [2022-12-13 14:39:08,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-12-13 14:39:08,163 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 14:39:08,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 224 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 14:39:08,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-12-13 14:39:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 296. [2022-12-13 14:39:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 157 states have (on average 1.1592356687898089) internal successors, (182), 159 states have internal predecessors, (182), 117 states have call successors, (117), 21 states have call predecessors, (117), 21 states have return successors, (116), 115 states have call predecessors, (116), 116 states have call successors, (116) [2022-12-13 14:39:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 415 transitions. [2022-12-13 14:39:08,348 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 415 transitions. Word has length 112 [2022-12-13 14:39:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:39:08,349 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 415 transitions. [2022-12-13 14:39:08,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-12-13 14:39:08,349 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 415 transitions. [2022-12-13 14:39:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-13 14:39:08,350 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:39:08,350 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:39:08,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 14:39:08,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:39:08,551 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:39:08,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:39:08,551 INFO L85 PathProgramCache]: Analyzing trace with hash 898620650, now seen corresponding path program 2 times [2022-12-13 14:39:08,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:39:08,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371537227] [2022-12-13 14:39:08,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:39:08,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:39:08,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:39:08,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249619663] [2022-12-13 14:39:08,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:39:08,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:39:08,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:39:08,561 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:39:08,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 14:39:08,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:39:08,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:39:08,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-13 14:39:08,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:39:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-12-13 14:39:09,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:39:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-12-13 14:39:12,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:39:12,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371537227] [2022-12-13 14:39:12,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:39:12,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249619663] [2022-12-13 14:39:12,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249619663] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:39:12,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:39:12,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2022-12-13 14:39:12,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716441547] [2022-12-13 14:39:12,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:39:12,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 14:39:12,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:39:12,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 14:39:12,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-12-13 14:39:12,175 INFO L87 Difference]: Start difference. First operand 296 states and 415 transitions. Second operand has 28 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2022-12-13 14:40:04,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:40:04,508 INFO L93 Difference]: Finished difference Result 413 states and 590 transitions. [2022-12-13 14:40:04,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 14:40:04,509 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) Word has length 123 [2022-12-13 14:40:04,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:40:04,510 INFO L225 Difference]: With dead ends: 413 [2022-12-13 14:40:04,510 INFO L226 Difference]: Without dead ends: 405 [2022-12-13 14:40:04,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=853, Invalid=4117, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 14:40:04,511 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 231 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.4s IncrementalHoareTripleChecker+Time [2022-12-13 14:40:04,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 605 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 1814 Invalid, 0 Unknown, 0 Unchecked, 26.4s Time] [2022-12-13 14:40:04,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-12-13 14:40:04,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 381. [2022-12-13 14:40:04,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 198 states have (on average 1.1666666666666667) internal successors, (231), 200 states have internal predecessors, (231), 157 states have call successors, (157), 25 states have call predecessors, (157), 25 states have return successors, (156), 155 states have call predecessors, (156), 156 states have call successors, (156) [2022-12-13 14:40:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 544 transitions. [2022-12-13 14:40:04,823 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 544 transitions. Word has length 123 [2022-12-13 14:40:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:40:04,823 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 544 transitions. [2022-12-13 14:40:04,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2022-12-13 14:40:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 544 transitions. [2022-12-13 14:40:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-13 14:40:04,825 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:40:04,825 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:40:04,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 14:40:05,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 14:40:05,026 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:40:05,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:05,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1287524986, now seen corresponding path program 4 times [2022-12-13 14:40:05,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:05,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112428479] [2022-12-13 14:40:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:05,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:05,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:40:05,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012898847] [2022-12-13 14:40:05,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:40:05,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:05,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:40:05,055 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:40:05,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 14:40:05,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:40:05,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:40:05,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-13 14:40:05,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:40:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 86 proven. 69 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-12-13 14:40:05,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:40:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 88 proven. 58 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2022-12-13 14:40:07,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:07,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112428479] [2022-12-13 14:40:07,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:40:07,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012898847] [2022-12-13 14:40:07,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012898847] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:40:07,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:40:07,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2022-12-13 14:40:07,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570338319] [2022-12-13 14:40:07,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:40:07,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 14:40:07,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:07,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 14:40:07,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2022-12-13 14:40:07,575 INFO L87 Difference]: Start difference. First operand 381 states and 544 transitions. Second operand has 31 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 27 states have internal predecessors, (57), 16 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (44), 16 states have call predecessors, (44), 14 states have call successors, (44) [2022-12-13 14:40:20,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:40:24,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:40:24,502 INFO L93 Difference]: Finished difference Result 446 states and 630 transitions. [2022-12-13 14:40:24,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 14:40:24,503 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 27 states have internal predecessors, (57), 16 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (44), 16 states have call predecessors, (44), 14 states have call successors, (44) Word has length 134 [2022-12-13 14:40:24,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:40:24,504 INFO L225 Difference]: With dead ends: 446 [2022-12-13 14:40:24,504 INFO L226 Difference]: Without dead ends: 444 [2022-12-13 14:40:24,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=534, Invalid=2546, Unknown=0, NotChecked=0, Total=3080 [2022-12-13 14:40:24,505 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 122 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 258 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-12-13 14:40:24,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 285 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1346 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2022-12-13 14:40:24,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-12-13 14:40:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 442. [2022-12-13 14:40:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 232 states have (on average 1.1594827586206897) internal successors, (269), 236 states have internal predecessors, (269), 179 states have call successors, (179), 30 states have call predecessors, (179), 30 states have return successors, (178), 175 states have call predecessors, (178), 178 states have call successors, (178) [2022-12-13 14:40:24,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 626 transitions. [2022-12-13 14:40:24,871 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 626 transitions. Word has length 134 [2022-12-13 14:40:24,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:40:24,872 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 626 transitions. [2022-12-13 14:40:24,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 27 states have internal predecessors, (57), 16 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (44), 16 states have call predecessors, (44), 14 states have call successors, (44) [2022-12-13 14:40:24,872 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 626 transitions. [2022-12-13 14:40:24,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-13 14:40:24,873 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:40:24,873 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:40:24,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 14:40:25,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 14:40:25,074 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:40:25,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:25,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1501327478, now seen corresponding path program 5 times [2022-12-13 14:40:25,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:25,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237811864] [2022-12-13 14:40:25,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:25,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:25,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:40:25,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082819939] [2022-12-13 14:40:25,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:40:25,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:25,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:40:25,105 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:40:25,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 14:40:25,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-13 14:40:25,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:40:25,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-13 14:40:25,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:40:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 123 proven. 188 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2022-12-13 14:40:27,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:40:28,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:28,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237811864] [2022-12-13 14:40:28,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:40:28,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082819939] [2022-12-13 14:40:28,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082819939] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:40:28,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:40:28,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-12-13 14:40:28,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118994544] [2022-12-13 14:40:28,213 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:40:28,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 14:40:28,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:28,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 14:40:28,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-12-13 14:40:28,214 INFO L87 Difference]: Start difference. First operand 442 states and 626 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 10 states have call predecessors, (23), 7 states have call successors, (23) [2022-12-13 14:40:31,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:40:31,048 INFO L93 Difference]: Finished difference Result 460 states and 641 transitions. [2022-12-13 14:40:31,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 14:40:31,048 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 10 states have call predecessors, (23), 7 states have call successors, (23) Word has length 139 [2022-12-13 14:40:31,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:40:31,050 INFO L225 Difference]: With dead ends: 460 [2022-12-13 14:40:31,050 INFO L226 Difference]: Without dead ends: 458 [2022-12-13 14:40:31,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 14:40:31,051 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 37 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-13 14:40:31,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 311 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-13 14:40:31,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-12-13 14:40:31,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 454. [2022-12-13 14:40:31,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 241 states have (on average 1.1535269709543567) internal successors, (278), 245 states have internal predecessors, (278), 179 states have call successors, (179), 33 states have call predecessors, (179), 33 states have return successors, (178), 175 states have call predecessors, (178), 178 states have call successors, (178) [2022-12-13 14:40:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 635 transitions. [2022-12-13 14:40:31,413 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 635 transitions. Word has length 139 [2022-12-13 14:40:31,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:40:31,414 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 635 transitions. [2022-12-13 14:40:31,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 10 states have call predecessors, (23), 7 states have call successors, (23) [2022-12-13 14:40:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 635 transitions. [2022-12-13 14:40:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-13 14:40:31,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:40:31,415 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:40:31,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-13 14:40:31,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 14:40:31,616 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:40:31,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:31,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1673937813, now seen corresponding path program 3 times [2022-12-13 14:40:31,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:31,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799571032] [2022-12-13 14:40:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:31,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:31,642 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:40:31,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968819873] [2022-12-13 14:40:31,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:40:31,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:31,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:40:31,646 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:40:31,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 14:40:31,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 14:40:31,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:40:31,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 14:40:31,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:40:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 90 proven. 37 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-12-13 14:40:32,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:40:35,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:35,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799571032] [2022-12-13 14:40:35,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:40:35,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968819873] [2022-12-13 14:40:35,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968819873] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:40:35,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:40:35,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-12-13 14:40:35,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356496142] [2022-12-13 14:40:35,303 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:40:35,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 14:40:35,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:35,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 14:40:35,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=393, Unknown=1, NotChecked=0, Total=462 [2022-12-13 14:40:35,304 INFO L87 Difference]: Start difference. First operand 454 states and 635 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-13 14:40:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:40:36,323 INFO L93 Difference]: Finished difference Result 497 states and 690 transitions. [2022-12-13 14:40:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 14:40:36,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 142 [2022-12-13 14:40:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:40:36,325 INFO L225 Difference]: With dead ends: 497 [2022-12-13 14:40:36,325 INFO L226 Difference]: Without dead ends: 490 [2022-12-13 14:40:36,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=119, Invalid=636, Unknown=1, NotChecked=0, Total=756 [2022-12-13 14:40:36,326 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 14:40:36,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 160 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 14:40:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-12-13 14:40:36,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 467. [2022-12-13 14:40:36,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 247 states have (on average 1.1497975708502024) internal successors, (284), 250 states have internal predecessors, (284), 184 states have call successors, (184), 35 states have call predecessors, (184), 35 states have return successors, (183), 181 states have call predecessors, (183), 183 states have call successors, (183) [2022-12-13 14:40:36,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 651 transitions. [2022-12-13 14:40:36,712 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 651 transitions. Word has length 142 [2022-12-13 14:40:36,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:40:36,712 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 651 transitions. [2022-12-13 14:40:36,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-13 14:40:36,712 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 651 transitions. [2022-12-13 14:40:36,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-13 14:40:36,713 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:40:36,713 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:40:36,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 14:40:36,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:36,914 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:40:36,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:40:36,915 INFO L85 PathProgramCache]: Analyzing trace with hash -154927127, now seen corresponding path program 6 times [2022-12-13 14:40:36,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:40:36,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449430669] [2022-12-13 14:40:36,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:40:36,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:40:36,942 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:40:36,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789381473] [2022-12-13 14:40:36,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:40:36,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:40:36,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:40:36,945 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:40:36,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 14:40:37,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-13 14:40:37,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:40:37,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-13 14:40:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:40:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 50 proven. 90 refuted. 0 times theorem prover too weak. 939 trivial. 0 not checked. [2022-12-13 14:40:37,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:40:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2022-12-13 14:40:40,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:40:40,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449430669] [2022-12-13 14:40:40,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:40:40,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789381473] [2022-12-13 14:40:40,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789381473] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:40:40,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:40:40,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2022-12-13 14:40:40,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201190306] [2022-12-13 14:40:40,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:40:40,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 14:40:40,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:40:40,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 14:40:40,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-12-13 14:40:40,525 INFO L87 Difference]: Start difference. First operand 467 states and 651 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 28 states have internal predecessors, (57), 16 states have call successors, (54), 3 states have call predecessors, (54), 2 states have return successors, (52), 16 states have call predecessors, (52), 16 states have call successors, (52) [2022-12-13 14:40:53,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:41:00,326 WARN L233 SmtUtils]: Spent 7.12s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:41:20,316 WARN L233 SmtUtils]: Spent 12.93s on a formula simplification. DAG size of input: 98 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:41:43,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:42:15,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:42:15,400 INFO L93 Difference]: Finished difference Result 659 states and 956 transitions. [2022-12-13 14:42:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 14:42:15,401 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 28 states have internal predecessors, (57), 16 states have call successors, (54), 3 states have call predecessors, (54), 2 states have return successors, (52), 16 states have call predecessors, (52), 16 states have call successors, (52) Word has length 156 [2022-12-13 14:42:15,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:42:15,403 INFO L225 Difference]: With dead ends: 659 [2022-12-13 14:42:15,403 INFO L226 Difference]: Without dead ends: 657 [2022-12-13 14:42:15,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 63.2s TimeCoverageRelationStatistics Valid=962, Invalid=4150, Unknown=0, NotChecked=0, Total=5112 [2022-12-13 14:42:15,404 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 197 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 2708 mSolverCounterSat, 539 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 3248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 2708 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.7s IncrementalHoareTripleChecker+Time [2022-12-13 14:42:15,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 886 Invalid, 3248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 2708 Invalid, 1 Unknown, 0 Unchecked, 31.7s Time] [2022-12-13 14:42:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-12-13 14:42:16,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 635. [2022-12-13 14:42:16,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 321 states have (on average 1.1806853582554517) internal successors, (379), 324 states have internal predecessors, (379), 272 states have call successors, (272), 41 states have call predecessors, (272), 41 states have return successors, (271), 269 states have call predecessors, (271), 271 states have call successors, (271) [2022-12-13 14:42:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 922 transitions. [2022-12-13 14:42:16,073 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 922 transitions. Word has length 156 [2022-12-13 14:42:16,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:42:16,074 INFO L495 AbstractCegarLoop]: Abstraction has 635 states and 922 transitions. [2022-12-13 14:42:16,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 28 states have internal predecessors, (57), 16 states have call successors, (54), 3 states have call predecessors, (54), 2 states have return successors, (52), 16 states have call predecessors, (52), 16 states have call successors, (52) [2022-12-13 14:42:16,074 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 922 transitions. [2022-12-13 14:42:16,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-12-13 14:42:16,075 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:42:16,075 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:42:16,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 14:42:16,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:42:16,277 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:42:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:42:16,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1839611947, now seen corresponding path program 7 times [2022-12-13 14:42:16,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:42:16,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367866964] [2022-12-13 14:42:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:16,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:42:16,303 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:42:16,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300399435] [2022-12-13 14:42:16,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:42:16,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:42:16,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:42:16,307 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:42:16,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 14:42:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:16,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-13 14:42:16,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:42:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 211 proven. 116 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2022-12-13 14:42:17,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:42:18,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:42:18,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367866964] [2022-12-13 14:42:18,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:42:18,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300399435] [2022-12-13 14:42:18,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300399435] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:42:18,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:42:18,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-12-13 14:42:18,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286986650] [2022-12-13 14:42:18,013 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:42:18,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 14:42:18,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:42:18,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 14:42:18,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-12-13 14:42:18,015 INFO L87 Difference]: Start difference. First operand 635 states and 922 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2022-12-13 14:42:20,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:42:20,479 INFO L93 Difference]: Finished difference Result 667 states and 961 transitions. [2022-12-13 14:42:20,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 14:42:20,480 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) Word has length 161 [2022-12-13 14:42:20,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:42:20,483 INFO L225 Difference]: With dead ends: 667 [2022-12-13 14:42:20,483 INFO L226 Difference]: Without dead ends: 665 [2022-12-13 14:42:20,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-12-13 14:42:20,484 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 57 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-13 14:42:20,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 234 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-13 14:42:20,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-12-13 14:42:21,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 659. [2022-12-13 14:42:21,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 334 states have (on average 1.1796407185628743) internal successors, (394), 337 states have internal predecessors, (394), 280 states have call successors, (280), 44 states have call predecessors, (280), 44 states have return successors, (279), 277 states have call predecessors, (279), 279 states have call successors, (279) [2022-12-13 14:42:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 953 transitions. [2022-12-13 14:42:21,225 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 953 transitions. Word has length 161 [2022-12-13 14:42:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:42:21,226 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 953 transitions. [2022-12-13 14:42:21,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2022-12-13 14:42:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 953 transitions. [2022-12-13 14:42:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-13 14:42:21,227 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:42:21,227 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:42:21,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 14:42:21,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 14:42:21,429 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:42:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:42:21,430 INFO L85 PathProgramCache]: Analyzing trace with hash 194788219, now seen corresponding path program 8 times [2022-12-13 14:42:21,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:42:21,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937396890] [2022-12-13 14:42:21,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:21,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:42:21,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:42:21,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357025098] [2022-12-13 14:42:21,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:42:21,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:42:21,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:42:21,457 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:42:21,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 14:42:21,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:42:21,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:42:21,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-13 14:42:21,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:42:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 164 proven. 117 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2022-12-13 14:42:30,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:42:37,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:42:37,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937396890] [2022-12-13 14:42:37,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:42:37,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357025098] [2022-12-13 14:42:37,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357025098] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:42:37,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:42:37,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-12-13 14:42:37,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691265515] [2022-12-13 14:42:37,456 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 14:42:37,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 14:42:37,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:42:37,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 14:42:37,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 14:42:37,458 INFO L87 Difference]: Start difference. First operand 659 states and 953 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2022-12-13 14:42:43,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:42:43,129 INFO L93 Difference]: Finished difference Result 713 states and 1015 transitions. [2022-12-13 14:42:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 14:42:43,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) Word has length 164 [2022-12-13 14:42:43,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:42:43,131 INFO L225 Difference]: With dead ends: 713 [2022-12-13 14:42:43,132 INFO L226 Difference]: Without dead ends: 711 [2022-12-13 14:42:43,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=349, Invalid=1543, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 14:42:43,132 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 73 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-13 14:42:43,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 245 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-13 14:42:43,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-12-13 14:42:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 704. [2022-12-13 14:42:43,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 361 states have (on average 1.1717451523545706) internal successors, (423), 364 states have internal predecessors, (423), 292 states have call successors, (292), 50 states have call predecessors, (292), 50 states have return successors, (291), 289 states have call predecessors, (291), 291 states have call successors, (291) [2022-12-13 14:42:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1006 transitions. [2022-12-13 14:42:43,878 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1006 transitions. Word has length 164 [2022-12-13 14:42:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:42:43,878 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 1006 transitions. [2022-12-13 14:42:43,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2022-12-13 14:42:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1006 transitions. [2022-12-13 14:42:43,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-13 14:42:43,879 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:42:43,879 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:42:43,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 14:42:44,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:42:44,080 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:42:44,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:42:44,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1734961994, now seen corresponding path program 4 times [2022-12-13 14:42:44,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:42:44,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108194491] [2022-12-13 14:42:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:44,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:42:44,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:42:44,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000538950] [2022-12-13 14:42:44,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:42:44,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:42:44,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:42:44,088 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:42:44,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 14:42:44,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:42:44,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:42:44,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-13 14:42:44,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:42:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 48 proven. 106 refuted. 0 times theorem prover too weak. 1119 trivial. 0 not checked. [2022-12-13 14:42:45,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:42:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 48 proven. 97 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-12-13 14:42:49,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:42:49,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108194491] [2022-12-13 14:42:49,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:42:49,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000538950] [2022-12-13 14:42:49,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000538950] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:42:49,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:42:49,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2022-12-13 14:42:49,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116009988] [2022-12-13 14:42:49,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:42:49,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 14:42:49,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:42:49,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 14:42:49,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-12-13 14:42:49,061 INFO L87 Difference]: Start difference. First operand 704 states and 1006 transitions. Second operand has 31 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 18 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (56), 16 states have call predecessors, (56), 16 states have call successors, (56) [2022-12-13 14:43:45,670 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:44:02,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:44:10,868 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:44:42,722 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 93 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:44:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:44:48,521 INFO L93 Difference]: Finished difference Result 901 states and 1321 transitions. [2022-12-13 14:44:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-13 14:44:48,522 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 18 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (56), 16 states have call predecessors, (56), 16 states have call successors, (56) Word has length 167 [2022-12-13 14:44:48,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:44:48,525 INFO L225 Difference]: With dead ends: 901 [2022-12-13 14:44:48,525 INFO L226 Difference]: Without dead ends: 893 [2022-12-13 14:44:48,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 64.9s TimeCoverageRelationStatistics Valid=1433, Invalid=6399, Unknown=0, NotChecked=0, Total=7832 [2022-12-13 14:44:48,527 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 211 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 3185 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 3734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 3185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.6s IncrementalHoareTripleChecker+Time [2022-12-13 14:44:48,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 979 Invalid, 3734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 3185 Invalid, 0 Unknown, 0 Unchecked, 56.6s Time] [2022-12-13 14:44:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-12-13 14:44:49,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 854. [2022-12-13 14:44:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 424 states have (on average 1.1863207547169812) internal successors, (503), 427 states have internal predecessors, (503), 376 states have call successors, (376), 53 states have call predecessors, (376), 53 states have return successors, (375), 373 states have call predecessors, (375), 375 states have call successors, (375) [2022-12-13 14:44:49,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1254 transitions. [2022-12-13 14:44:49,547 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1254 transitions. Word has length 167 [2022-12-13 14:44:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:44:49,548 INFO L495 AbstractCegarLoop]: Abstraction has 854 states and 1254 transitions. [2022-12-13 14:44:49,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 18 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (56), 16 states have call predecessors, (56), 16 states have call successors, (56) [2022-12-13 14:44:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1254 transitions. [2022-12-13 14:44:49,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-13 14:44:49,550 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:44:49,550 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:44:49,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 14:44:49,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:44:49,751 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:44:49,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:44:49,751 INFO L85 PathProgramCache]: Analyzing trace with hash 632149420, now seen corresponding path program 5 times [2022-12-13 14:44:49,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:44:49,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120304649] [2022-12-13 14:44:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:44:49,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:44:49,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:44:49,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951287221] [2022-12-13 14:44:49,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:44:49,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:44:49,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:44:49,762 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:44:49,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 14:44:49,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 14:44:49,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:44:49,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-13 14:44:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:44:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 48 proven. 97 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-12-13 14:44:50,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:45:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 48 proven. 97 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-12-13 14:45:04,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:45:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120304649] [2022-12-13 14:45:04,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:45:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951287221] [2022-12-13 14:45:04,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951287221] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:45:04,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:45:04,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-12-13 14:45:04,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526001306] [2022-12-13 14:45:04,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:45:04,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 14:45:04,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:45:04,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 14:45:04,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-12-13 14:45:04,033 INFO L87 Difference]: Start difference. First operand 854 states and 1254 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 17 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) [2022-12-13 14:46:30,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:46:30,250 INFO L93 Difference]: Finished difference Result 1098 states and 1629 transitions. [2022-12-13 14:46:30,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 14:46:30,252 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 17 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) Word has length 167 [2022-12-13 14:46:30,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:46:30,255 INFO L225 Difference]: With dead ends: 1098 [2022-12-13 14:46:30,255 INFO L226 Difference]: Without dead ends: 1089 [2022-12-13 14:46:30,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=1009, Invalid=4691, Unknown=0, NotChecked=0, Total=5700 [2022-12-13 14:46:30,256 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 141 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.9s IncrementalHoareTripleChecker+Time [2022-12-13 14:46:30,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 711 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 46.9s Time] [2022-12-13 14:46:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-12-13 14:46:31,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1032. [2022-12-13 14:46:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 507 states have (on average 1.1873767258382644) internal successors, (602), 510 states have internal predecessors, (602), 464 states have call successors, (464), 60 states have call predecessors, (464), 60 states have return successors, (463), 461 states have call predecessors, (463), 463 states have call successors, (463) [2022-12-13 14:46:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1529 transitions. [2022-12-13 14:46:31,566 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1529 transitions. Word has length 167 [2022-12-13 14:46:31,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:46:31,566 INFO L495 AbstractCegarLoop]: Abstraction has 1032 states and 1529 transitions. [2022-12-13 14:46:31,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 17 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) [2022-12-13 14:46:31,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1529 transitions. [2022-12-13 14:46:31,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-12-13 14:46:31,568 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:46:31,568 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:46:31,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 14:46:31,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 14:46:31,770 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:46:31,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:46:31,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1806499716, now seen corresponding path program 9 times [2022-12-13 14:46:31,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:46:31,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579584154] [2022-12-13 14:46:31,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:46:31,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:46:31,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:46:31,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338910573] [2022-12-13 14:46:31,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:46:31,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:46:31,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:46:31,799 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:46:31,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 14:46:31,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 14:46:31,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:46:32,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 88 conjunts are in the unsatisfiable core [2022-12-13 14:46:32,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:46:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1505 backedges. 58 proven. 132 refuted. 0 times theorem prover too weak. 1315 trivial. 0 not checked. [2022-12-13 14:46:32,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:46:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1505 backedges. 52 proven. 129 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2022-12-13 14:46:37,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:46:37,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579584154] [2022-12-13 14:46:37,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:46:37,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338910573] [2022-12-13 14:46:37,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338910573] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:46:37,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:46:37,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2022-12-13 14:46:37,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704783756] [2022-12-13 14:46:37,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:46:37,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 14:46:37,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:46:37,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 14:46:37,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-12-13 14:46:37,684 INFO L87 Difference]: Start difference. First operand 1032 states and 1529 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 30 states have internal predecessors, (66), 17 states have call successors, (60), 3 states have call predecessors, (60), 2 states have return successors, (58), 17 states have call predecessors, (58), 17 states have call successors, (58) [2022-12-13 14:46:45,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:46:47,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:47:03,842 WARN L233 SmtUtils]: Spent 12.80s on a formula simplification. DAG size of input: 120 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:47:11,306 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:47:36,475 WARN L233 SmtUtils]: Spent 9.78s on a formula simplification. DAG size of input: 101 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:48:00,214 WARN L233 SmtUtils]: Spent 12.88s on a formula simplification. DAG size of input: 107 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:48:06,917 WARN L233 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 102 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:48:28,961 WARN L233 SmtUtils]: Spent 7.65s on a formula simplification. DAG size of input: 122 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:48:49,929 WARN L233 SmtUtils]: Spent 9.99s on a formula simplification. DAG size of input: 99 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:48:52,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:48:52,748 INFO L93 Difference]: Finished difference Result 1381 states and 2070 transitions. [2022-12-13 14:48:52,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-13 14:48:52,749 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 30 states have internal predecessors, (66), 17 states have call successors, (60), 3 states have call predecessors, (60), 2 states have return successors, (58), 17 states have call predecessors, (58), 17 states have call successors, (58) Word has length 181 [2022-12-13 14:48:52,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:48:52,753 INFO L225 Difference]: With dead ends: 1381 [2022-12-13 14:48:52,753 INFO L226 Difference]: Without dead ends: 1379 [2022-12-13 14:48:52,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 99.6s TimeCoverageRelationStatistics Valid=1402, Invalid=6080, Unknown=0, NotChecked=0, Total=7482 [2022-12-13 14:48:52,754 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 280 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 3101 mSolverCounterSat, 669 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 3772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 3101 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.9s IncrementalHoareTripleChecker+Time [2022-12-13 14:48:52,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 1090 Invalid, 3772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [669 Valid, 3101 Invalid, 2 Unknown, 0 Unchecked, 36.9s Time] [2022-12-13 14:48:52,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-12-13 14:48:54,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1315. [2022-12-13 14:48:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 641 states have (on average 1.1934477379095163) internal successors, (765), 646 states have internal predecessors, (765), 603 states have call successors, (603), 70 states have call predecessors, (603), 70 states have return successors, (602), 598 states have call predecessors, (602), 602 states have call successors, (602) [2022-12-13 14:48:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1970 transitions. [2022-12-13 14:48:54,724 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1970 transitions. Word has length 181 [2022-12-13 14:48:54,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:48:54,725 INFO L495 AbstractCegarLoop]: Abstraction has 1315 states and 1970 transitions. [2022-12-13 14:48:54,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 30 states have internal predecessors, (66), 17 states have call successors, (60), 3 states have call predecessors, (60), 2 states have return successors, (58), 17 states have call predecessors, (58), 17 states have call successors, (58) [2022-12-13 14:48:54,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1970 transitions. [2022-12-13 14:48:54,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-13 14:48:54,726 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:48:54,727 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:48:54,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 14:48:54,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 14:48:54,927 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:48:54,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:48:54,927 INFO L85 PathProgramCache]: Analyzing trace with hash -299258380, now seen corresponding path program 10 times [2022-12-13 14:48:54,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:48:54,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893132025] [2022-12-13 14:48:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:48:54,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:48:54,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 14:48:54,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359176553] [2022-12-13 14:48:54,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:48:54,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:48:54,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:48:54,935 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:48:54,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba4758ba-261b-4c79-92c8-7a28cf4fff57/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 14:48:55,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:48:55,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:48:55,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-13 14:48:55,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:48:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 131 proven. 137 refuted. 0 times theorem prover too weak. 1341 trivial. 0 not checked. [2022-12-13 14:48:56,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:49:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1609 backedges. 131 proven. 128 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2022-12-13 14:49:05,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:49:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893132025] [2022-12-13 14:49:05,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 14:49:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359176553] [2022-12-13 14:49:05,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359176553] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:49:05,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:49:05,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2022-12-13 14:49:05,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600681574] [2022-12-13 14:49:05,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:49:05,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 14:49:05,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:49:05,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 14:49:05,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2022-12-13 14:49:05,647 INFO L87 Difference]: Start difference. First operand 1315 states and 1970 transitions. Second operand has 32 states, 31 states have (on average 2.096774193548387) internal successors, (65), 29 states have internal predecessors, (65), 19 states have call successors, (63), 3 states have call predecessors, (63), 3 states have return successors, (62), 19 states have call predecessors, (62), 18 states have call successors, (62) [2022-12-13 14:49:11,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:49:38,233 WARN L233 SmtUtils]: Spent 24.00s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:49:47,068 WARN L233 SmtUtils]: Spent 7.05s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:49:49,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:49:52,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:49:54,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:50:05,879 WARN L233 SmtUtils]: Spent 9.14s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:50:17,744 WARN L233 SmtUtils]: Spent 6.97s on a formula simplification that was a NOOP. DAG size: 114 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:50:21,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:50:23,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:50:25,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:50:27,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:50:49,165 WARN L233 SmtUtils]: Spent 20.95s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:50:58,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:51:00,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:51:02,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:51:04,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:51:09,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:51:12,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:51:18,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:51:20,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:51:23,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:51:25,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:51:27,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:51:40,666 WARN L233 SmtUtils]: Spent 11.77s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:51:48,510 WARN L233 SmtUtils]: Spent 6.73s on a formula simplification that was a NOOP. DAG size: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:51:50,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:51:52,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:51:54,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:51:57,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:51:59,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:52:04,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 14:52:19,956 WARN L233 SmtUtils]: Spent 10.59s on a formula simplification that was a NOOP. DAG size: 164 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:52:23,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []