./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array15_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array15_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R --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 511c1484167d1d7d90ff27dae8a1569edd7c5a72fd917e4f05baeab770e0fcd4 --- 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-38b53e6 [2022-11-25 16:55:50,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 16:55:50,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 16:55:50,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 16:55:50,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 16:55:50,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 16:55:50,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 16:55:50,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 16:55:50,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 16:55:50,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 16:55:50,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 16:55:50,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 16:55:50,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 16:55:50,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 16:55:50,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 16:55:50,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 16:55:50,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 16:55:50,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 16:55:50,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 16:55:50,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 16:55:50,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 16:55:50,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 16:55:50,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 16:55:50,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 16:55:50,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 16:55:50,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 16:55:50,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 16:55:50,297 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 16:55:50,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 16:55:50,299 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 16:55:50,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 16:55:50,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 16:55:50,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 16:55:50,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 16:55:50,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 16:55:50,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 16:55:50,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 16:55:50,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 16:55:50,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 16:55:50,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 16:55:50,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 16:55:50,312 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 16:55:50,373 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 16:55:50,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 16:55:50,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 16:55:50,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 16:55:50,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 16:55:50,376 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 16:55:50,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 16:55:50,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 16:55:50,377 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 16:55:50,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 16:55:50,379 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 16:55:50,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 16:55:50,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 16:55:50,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 16:55:50,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 16:55:50,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 16:55:50,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 16:55:50,380 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 16:55:50,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 16:55:50,381 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 16:55:50,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 16:55:50,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 16:55:50,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 16:55:50,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 16:55:50,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:55:50,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 16:55:50,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 16:55:50,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 16:55:50,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 16:55:50,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 16:55:50,384 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 16:55:50,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 16:55:50,385 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 16:55:50,385 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 16:55:50,385 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_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 511c1484167d1d7d90ff27dae8a1569edd7c5a72fd917e4f05baeab770e0fcd4 [2022-11-25 16:55:50,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 16:55:50,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 16:55:50,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 16:55:50,804 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 16:55:50,804 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 16:55:50,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/array-patterns/array15_pattern.c [2022-11-25 16:55:54,058 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 16:55:54,302 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 16:55:54,306 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/sv-benchmarks/c/array-patterns/array15_pattern.c [2022-11-25 16:55:54,316 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/data/84a0ea143/d72407ec7e4a4753836d034265b0f56c/FLAG67da8942c [2022-11-25 16:55:54,354 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/data/84a0ea143/d72407ec7e4a4753836d034265b0f56c [2022-11-25 16:55:54,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 16:55:54,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 16:55:54,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 16:55:54,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 16:55:54,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 16:55:54,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:55:54" (1/1) ... [2022-11-25 16:55:54,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1899bd1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:55:54, skipping insertion in model container [2022-11-25 16:55:54,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 04:55:54" (1/1) ... [2022-11-25 16:55:54,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 16:55:54,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 16:55:54,578 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_b621be3b-8ff6-49d9-8883-4b3bd3c99101/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2022-11-25 16:55:54,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:55:54,620 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 16:55:54,640 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_b621be3b-8ff6-49d9-8883-4b3bd3c99101/sv-benchmarks/c/array-patterns/array15_pattern.c[1424,1437] [2022-11-25 16:55:54,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 16:55:54,687 INFO L208 MainTranslator]: Completed translation [2022-11-25 16:55:54,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:55:54 WrapperNode [2022-11-25 16:55:54,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 16:55:54,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 16:55:54,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 16:55:54,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 16:55:54,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:55:54" (1/1) ... [2022-11-25 16:55:54,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:55:54" (1/1) ... [2022-11-25 16:55:54,735 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-11-25 16:55:54,736 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 16:55:54,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 16:55:54,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 16:55:54,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 16:55:54,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:55:54" (1/1) ... [2022-11-25 16:55:54,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:55:54" (1/1) ... [2022-11-25 16:55:54,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:55:54" (1/1) ... [2022-11-25 16:55:54,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:55:54" (1/1) ... [2022-11-25 16:55:54,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:55:54" (1/1) ... [2022-11-25 16:55:54,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:55:54" (1/1) ... [2022-11-25 16:55:54,765 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:55:54" (1/1) ... [2022-11-25 16:55:54,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:55:54" (1/1) ... [2022-11-25 16:55:54,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 16:55:54,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 16:55:54,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 16:55:54,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 16:55:54,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:55:54" (1/1) ... [2022-11-25 16:55:54,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 16:55:54,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:54,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 16:55:54,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 16:55:54,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 16:55:54,868 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 16:55:54,869 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 16:55:54,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 16:55:54,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 16:55:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 16:55:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 16:55:54,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 16:55:54,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 16:55:54,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 16:55:54,962 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 16:55:54,965 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 16:55:55,195 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 16:55:55,202 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 16:55:55,203 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-25 16:55:55,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:55:55 BoogieIcfgContainer [2022-11-25 16:55:55,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 16:55:55,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 16:55:55,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 16:55:55,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 16:55:55,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 04:55:54" (1/3) ... [2022-11-25 16:55:55,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4e55f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:55:55, skipping insertion in model container [2022-11-25 16:55:55,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 04:55:54" (2/3) ... [2022-11-25 16:55:55,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4e55f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 04:55:55, skipping insertion in model container [2022-11-25 16:55:55,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 04:55:55" (3/3) ... [2022-11-25 16:55:55,233 INFO L112 eAbstractionObserver]: Analyzing ICFG array15_pattern.c [2022-11-25 16:55:55,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 16:55:55,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 16:55:55,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 16:55:55,374 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;@5e668451, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 16:55:55,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 16:55:55,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 16:55:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 16:55:55,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:55,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:55,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:55:55,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:55,400 INFO L85 PathProgramCache]: Analyzing trace with hash 179087049, now seen corresponding path program 1 times [2022-11-25 16:55:55,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:55,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568080628] [2022-11-25 16:55:55,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:55,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:55,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:55,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568080628] [2022-11-25 16:55:55,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 16:55:55,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464337178] [2022-11-25 16:55:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:55,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:55,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:55,657 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:55,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 16:55:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:55,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 16:55:55,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 16:55:55,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:55:55,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464337178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:55:55,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:55:55,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 16:55:55,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755900342] [2022-11-25 16:55:55,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:55:55,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 16:55:55,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:55,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 16:55:55,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 16:55:55,846 INFO L87 Difference]: Start difference. First operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 16:55:55,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:55,879 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2022-11-25 16:55:55,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 16:55:55,882 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-25 16:55:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:55,892 INFO L225 Difference]: With dead ends: 61 [2022-11-25 16:55:55,892 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 16:55:55,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 16:55:55,900 INFO L413 NwaCegarLoop]: 39 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, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:55,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:55:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 16:55:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-25 16:55:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 16:55:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-11-25 16:55:55,949 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2022-11-25 16:55:55,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:55,950 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-11-25 16:55:55,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 16:55:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-11-25 16:55:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 16:55:55,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:55,954 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:55,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:56,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 16:55:56,161 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:55:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:56,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1195633489, now seen corresponding path program 1 times [2022-11-25 16:55:56,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:56,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843638770] [2022-11-25 16:55:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:56,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:56,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:55:56,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440171242] [2022-11-25 16:55:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:56,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:56,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:56,190 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:56,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 16:55:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:56,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 16:55:56,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:55:56,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:55:56,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:56,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843638770] [2022-11-25 16:55:56,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:55:56,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440171242] [2022-11-25 16:55:56,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440171242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:55:56,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:55:56,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 16:55:56,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385026712] [2022-11-25 16:55:56,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:55:56,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 16:55:56,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:56,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 16:55:56,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 16:55:56,532 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 16:55:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:56,783 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2022-11-25 16:55:56,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 16:55:56,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-11-25 16:55:56,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:56,786 INFO L225 Difference]: With dead ends: 60 [2022-11-25 16:55:56,786 INFO L226 Difference]: Without dead ends: 40 [2022-11-25 16:55:56,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-25 16:55:56,790 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:56,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 56 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:55:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-25 16:55:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-11-25 16:55:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 16:55:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-11-25 16:55:56,818 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2022-11-25 16:55:56,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:56,819 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-11-25 16:55:56,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 16:55:56,819 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-11-25 16:55:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 16:55:56,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:56,822 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1] [2022-11-25 16:55:56,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:57,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:57,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:55:57,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:57,030 INFO L85 PathProgramCache]: Analyzing trace with hash -712222617, now seen corresponding path program 1 times [2022-11-25 16:55:57,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:57,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561850533] [2022-11-25 16:55:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:57,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:57,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:55:57,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915017805] [2022-11-25 16:55:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:57,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:57,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:57,058 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:57,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 16:55:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:57,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 16:55:57,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:55:57,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 16:55:57,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:57,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561850533] [2022-11-25 16:55:57,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:55:57,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915017805] [2022-11-25 16:55:57,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915017805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 16:55:57,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 16:55:57,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 16:55:57,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208872980] [2022-11-25 16:55:57,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 16:55:57,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 16:55:57,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:57,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 16:55:57,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 16:55:57,252 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 16:55:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:57,321 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2022-11-25 16:55:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 16:55:57,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-11-25 16:55:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:57,323 INFO L225 Difference]: With dead ends: 63 [2022-11-25 16:55:57,323 INFO L226 Difference]: Without dead ends: 38 [2022-11-25 16:55:57,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 16:55:57,332 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:57,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 16:55:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-25 16:55:57,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-11-25 16:55:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 16:55:57,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-25 16:55:57,345 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 35 [2022-11-25 16:55:57,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:57,345 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-25 16:55:57,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 16:55:57,348 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-25 16:55:57,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 16:55:57,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:57,350 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:57,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:57,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:57,557 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:55:57,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:57,558 INFO L85 PathProgramCache]: Analyzing trace with hash -459431893, now seen corresponding path program 1 times [2022-11-25 16:55:57,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:57,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103171878] [2022-11-25 16:55:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:57,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:57,587 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:55:57,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5604180] [2022-11-25 16:55:57,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:57,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:57,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:57,590 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:57,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 16:55:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:57,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 16:55:57,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 16:55:58,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:55:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 16:55:58,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:55:58,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103171878] [2022-11-25 16:55:58,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:55:58,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5604180] [2022-11-25 16:55:58,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5604180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:55:58,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:55:58,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2022-11-25 16:55:58,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867131402] [2022-11-25 16:55:58,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:55:58,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 16:55:58,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:55:58,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 16:55:58,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-11-25 16:55:58,749 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 16:55:59,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:55:59,436 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2022-11-25 16:55:59,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 16:55:59,437 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2022-11-25 16:55:59,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:55:59,439 INFO L225 Difference]: With dead ends: 107 [2022-11-25 16:55:59,440 INFO L226 Difference]: Without dead ends: 85 [2022-11-25 16:55:59,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-11-25 16:55:59,442 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 16:55:59,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 176 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 16:55:59,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-25 16:55:59,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2022-11-25 16:55:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 50 states have internal predecessors, (59), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 16:55:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-11-25 16:55:59,471 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 39 [2022-11-25 16:55:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:55:59,472 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-11-25 16:55:59,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 16:55:59,473 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-11-25 16:55:59,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 16:55:59,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:55:59,476 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:55:59,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 16:55:59,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:59,682 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:55:59,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:55:59,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1046237907, now seen corresponding path program 1 times [2022-11-25 16:55:59,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:55:59,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985013376] [2022-11-25 16:55:59,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:59,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:55:59,699 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:55:59,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536014047] [2022-11-25 16:55:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:55:59,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:55:59,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:55:59,701 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:55:59,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 16:55:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:55:59,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 16:55:59,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:55:59,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 16:56:00,381 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 16:56:00,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 27 [2022-11-25 16:56:00,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 16:56:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:56:00,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:00,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-25 16:56:00,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-11-25 16:56:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 16:56:00,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:00,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985013376] [2022-11-25 16:56:00,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:00,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536014047] [2022-11-25 16:56:00,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536014047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:00,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:56:00,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2022-11-25 16:56:00,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167293588] [2022-11-25 16:56:00,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:00,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 16:56:00,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:00,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 16:56:00,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-11-25 16:56:00,968 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-25 16:56:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:01,956 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2022-11-25 16:56:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 16:56:01,958 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2022-11-25 16:56:01,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:01,959 INFO L225 Difference]: With dead ends: 101 [2022-11-25 16:56:01,960 INFO L226 Difference]: Without dead ends: 97 [2022-11-25 16:56:01,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 16:56:01,961 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 151 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:01,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 174 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 16:56:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-25 16:56:01,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2022-11-25 16:56:01,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 16:56:01,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2022-11-25 16:56:01,999 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 39 [2022-11-25 16:56:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:02,000 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2022-11-25 16:56:02,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-25 16:56:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2022-11-25 16:56:02,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 16:56:02,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:02,010 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:56:02,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:02,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:02,227 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:02,232 INFO L85 PathProgramCache]: Analyzing trace with hash -252023569, now seen corresponding path program 2 times [2022-11-25 16:56:02,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:02,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408853557] [2022-11-25 16:56:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:02,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:02,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:02,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933627247] [2022-11-25 16:56:02,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:56:02,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:02,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:02,250 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:02,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 16:56:02,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:56:02,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:56:02,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:56:02,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:56:02,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 16:56:02,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:02,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408853557] [2022-11-25 16:56:02,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:02,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933627247] [2022-11-25 16:56:02,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933627247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:02,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:56:02,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-25 16:56:02,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072224035] [2022-11-25 16:56:02,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:02,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 16:56:02,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:02,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 16:56:02,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-25 16:56:02,521 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 16:56:02,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:02,770 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2022-11-25 16:56:02,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 16:56:02,771 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-25 16:56:02,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:02,773 INFO L225 Difference]: With dead ends: 155 [2022-11-25 16:56:02,773 INFO L226 Difference]: Without dead ends: 117 [2022-11-25 16:56:02,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:56:02,775 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 147 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:02,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 101 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:56:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-25 16:56:02,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 90. [2022-11-25 16:56:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 77 states have internal predecessors, (90), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 16:56:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2022-11-25 16:56:02,804 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 41 [2022-11-25 16:56:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:02,805 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2022-11-25 16:56:02,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 16:56:02,805 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2022-11-25 16:56:02,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 16:56:02,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:02,806 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:56:02,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:03,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:03,013 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:03,014 INFO L85 PathProgramCache]: Analyzing trace with hash 796161581, now seen corresponding path program 2 times [2022-11-25 16:56:03,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:03,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165272850] [2022-11-25 16:56:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:03,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:03,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:03,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834116501] [2022-11-25 16:56:03,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:56:03,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:03,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:03,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:03,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 16:56:03,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:56:03,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:56:03,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:56:03,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 16:56:03,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 16:56:03,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:03,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165272850] [2022-11-25 16:56:03,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:03,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834116501] [2022-11-25 16:56:03,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834116501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:03,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:56:03,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-25 16:56:03,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701328889] [2022-11-25 16:56:03,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:03,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 16:56:03,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:03,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 16:56:03,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-25 16:56:03,324 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 16:56:03,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:03,583 INFO L93 Difference]: Finished difference Result 167 states and 203 transitions. [2022-11-25 16:56:03,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 16:56:03,584 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-25 16:56:03,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:03,585 INFO L225 Difference]: With dead ends: 167 [2022-11-25 16:56:03,585 INFO L226 Difference]: Without dead ends: 120 [2022-11-25 16:56:03,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-11-25 16:56:03,587 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 44 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:03,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 98 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:56:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-25 16:56:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2022-11-25 16:56:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 90 states have (on average 1.2) internal successors, (108), 91 states have internal predecessors, (108), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 16:56:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2022-11-25 16:56:03,622 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 41 [2022-11-25 16:56:03,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:03,622 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2022-11-25 16:56:03,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 16:56:03,623 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2022-11-25 16:56:03,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 16:56:03,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:03,624 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:56:03,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:03,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:03,831 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:03,832 INFO L85 PathProgramCache]: Analyzing trace with hash 178867369, now seen corresponding path program 3 times [2022-11-25 16:56:03,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:03,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202725658] [2022-11-25 16:56:03,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:03,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:03,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:03,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199132861] [2022-11-25 16:56:03,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:56:03,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:03,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:03,849 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:03,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 16:56:03,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 16:56:03,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:56:03,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 16:56:03,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 16:56:04,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 16:56:04,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:04,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202725658] [2022-11-25 16:56:04,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:04,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199132861] [2022-11-25 16:56:04,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199132861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:04,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:56:04,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-25 16:56:04,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566800277] [2022-11-25 16:56:04,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:04,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 16:56:04,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:04,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 16:56:04,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 16:56:04,107 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 16:56:04,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:04,290 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2022-11-25 16:56:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 16:56:04,290 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-11-25 16:56:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:04,292 INFO L225 Difference]: With dead ends: 144 [2022-11-25 16:56:04,292 INFO L226 Difference]: Without dead ends: 74 [2022-11-25 16:56:04,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:56:04,293 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:04,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 93 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 16:56:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-25 16:56:04,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-11-25 16:56:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 16:56:04,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2022-11-25 16:56:04,313 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 44 [2022-11-25 16:56:04,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:04,313 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2022-11-25 16:56:04,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 16:56:04,314 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2022-11-25 16:56:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 16:56:04,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:04,315 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:56:04,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:04,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 16:56:04,528 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:04,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1693722629, now seen corresponding path program 3 times [2022-11-25 16:56:04,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:04,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459048686] [2022-11-25 16:56:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:04,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:04,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:04,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843740460] [2022-11-25 16:56:04,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 16:56:04,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:04,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:04,559 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:04,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 16:56:04,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 16:56:04,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:56:04,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 16:56:04,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 16:56:04,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-25 16:56:05,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:05,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459048686] [2022-11-25 16:56:05,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:05,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843740460] [2022-11-25 16:56:05,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843740460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:05,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:56:05,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2022-11-25 16:56:05,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874877157] [2022-11-25 16:56:05,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:05,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 16:56:05,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:05,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 16:56:05,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-11-25 16:56:05,345 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 22 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-25 16:56:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:05,986 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2022-11-25 16:56:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 16:56:05,987 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2022-11-25 16:56:05,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:05,988 INFO L225 Difference]: With dead ends: 98 [2022-11-25 16:56:05,988 INFO L226 Difference]: Without dead ends: 92 [2022-11-25 16:56:05,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 16:56:05,990 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 166 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:05,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 136 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 16:56:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-25 16:56:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 54. [2022-11-25 16:56:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 16:56:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-11-25 16:56:06,005 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 48 [2022-11-25 16:56:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:06,006 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-11-25 16:56:06,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-25 16:56:06,006 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-11-25 16:56:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-25 16:56:06,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:06,007 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2022-11-25 16:56:06,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:06,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:06,214 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:06,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:06,214 INFO L85 PathProgramCache]: Analyzing trace with hash 11450257, now seen corresponding path program 4 times [2022-11-25 16:56:06,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:06,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573525338] [2022-11-25 16:56:06,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:06,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:06,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:06,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303112902] [2022-11-25 16:56:06,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:56:06,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:06,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:06,240 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:06,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 16:56:06,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:56:06,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:56:06,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-25 16:56:06,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:06,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-25 16:56:06,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2022-11-25 16:56:07,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:07,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:07,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:56:07,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 54 [2022-11-25 16:56:07,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:07,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:07,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:07,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:07,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:56:07,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 68 [2022-11-25 16:56:08,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:08,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:08,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:08,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:08,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:08,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:08,871 INFO L321 Elim1Store]: treesize reduction 49, result has 49.5 percent of original size [2022-11-25 16:56:08,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 60 treesize of output 96 [2022-11-25 16:56:11,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 16:56:11,682 INFO L321 Elim1Store]: treesize reduction 152, result has 55.9 percent of original size [2022-11-25 16:56:11,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 115 treesize of output 234 [2022-11-25 16:56:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:56:33,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:36,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:36,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573525338] [2022-11-25 16:56:36,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:36,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303112902] [2022-11-25 16:56:36,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303112902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:56:36,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:56:36,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-11-25 16:56:36,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74108784] [2022-11-25 16:56:36,362 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:36,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 16:56:36,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:36,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 16:56:36,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=2513, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 16:56:36,365 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 34 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 16:56:39,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:39,156 INFO L93 Difference]: Finished difference Result 122 states and 146 transitions. [2022-11-25 16:56:39,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 16:56:39,157 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 34 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-11-25 16:56:39,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:39,158 INFO L225 Difference]: With dead ends: 122 [2022-11-25 16:56:39,158 INFO L226 Difference]: Without dead ends: 118 [2022-11-25 16:56:39,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=453, Invalid=3453, Unknown=0, NotChecked=0, Total=3906 [2022-11-25 16:56:39,160 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 73 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:39,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 195 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-25 16:56:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-25 16:56:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2022-11-25 16:56:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 81 states have internal predecessors, (96), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 16:56:39,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2022-11-25 16:56:39,190 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 57 [2022-11-25 16:56:39,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:39,190 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2022-11-25 16:56:39,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 34 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 16:56:39,190 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2022-11-25 16:56:39,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-25 16:56:39,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:39,191 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2022-11-25 16:56:39,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:39,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 16:56:39,398 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:39,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:39,399 INFO L85 PathProgramCache]: Analyzing trace with hash 230304975, now seen corresponding path program 4 times [2022-11-25 16:56:39,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:39,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484830599] [2022-11-25 16:56:39,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:39,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:39,412 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:39,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726021480] [2022-11-25 16:56:39,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 16:56:39,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:39,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:39,415 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:39,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 16:56:39,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 16:56:39,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:56:39,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-25 16:56:39,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:39,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-25 16:56:40,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2022-11-25 16:56:40,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:40,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:40,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:40,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:56:40,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-11-25 16:56:40,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:40,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:40,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:40,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:40,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:40,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:56:40,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2022-11-25 16:56:41,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:41,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:41,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:41,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:41,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:41,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:41,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:41,767 INFO L321 Elim1Store]: treesize reduction 108, result has 16.3 percent of original size [2022-11-25 16:56:41,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 73 treesize of output 68 [2022-11-25 16:56:42,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:42,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:42,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:42,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:42,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:56:42,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 19 [2022-11-25 16:56:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 16:56:43,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:44,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:44,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484830599] [2022-11-25 16:56:44,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:44,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726021480] [2022-11-25 16:56:44,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726021480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:56:44,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:56:44,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-11-25 16:56:44,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646351275] [2022-11-25 16:56:44,767 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:44,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 16:56:44,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:44,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 16:56:44,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2165, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 16:56:44,770 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 35 states, 34 states have (on average 1.411764705882353) internal successors, (48), 31 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 16:56:47,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:47,372 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2022-11-25 16:56:47,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 16:56:47,373 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.411764705882353) internal successors, (48), 31 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2022-11-25 16:56:47,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:47,374 INFO L225 Difference]: With dead ends: 156 [2022-11-25 16:56:47,374 INFO L226 Difference]: Without dead ends: 152 [2022-11-25 16:56:47,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=709, Invalid=3847, Unknown=0, NotChecked=0, Total=4556 [2022-11-25 16:56:47,377 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 90 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:47,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 207 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 16:56:47,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-25 16:56:47,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 101. [2022-11-25 16:56:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 89 states have internal predecessors, (106), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 16:56:47,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2022-11-25 16:56:47,413 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 57 [2022-11-25 16:56:47,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:47,414 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2022-11-25 16:56:47,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.411764705882353) internal successors, (48), 31 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 16:56:47,414 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2022-11-25 16:56:47,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-25 16:56:47,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:47,416 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 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] [2022-11-25 16:56:47,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:47,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 16:56:47,622 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:47,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:47,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1720947117, now seen corresponding path program 5 times [2022-11-25 16:56:47,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:47,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751749649] [2022-11-25 16:56:47,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:47,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:47,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:47,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628095064] [2022-11-25 16:56:47,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 16:56:47,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:47,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:47,637 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:47,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 16:56:48,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-25 16:56:48,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:56:48,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 16:56:48,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 16:56:48,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 16:56:48,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:48,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751749649] [2022-11-25 16:56:48,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:48,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628095064] [2022-11-25 16:56:48,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628095064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:48,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:56:48,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-25 16:56:48,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78232252] [2022-11-25 16:56:48,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:48,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:56:48,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:48,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:56:48,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:56:48,307 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 16:56:48,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:48,573 INFO L93 Difference]: Finished difference Result 249 states and 300 transitions. [2022-11-25 16:56:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 16:56:48,582 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-11-25 16:56:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:48,586 INFO L225 Difference]: With dead ends: 249 [2022-11-25 16:56:48,586 INFO L226 Difference]: Without dead ends: 168 [2022-11-25 16:56:48,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-25 16:56:48,589 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 116 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:48,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 145 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:56:48,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-25 16:56:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 135. [2022-11-25 16:56:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 120 states have (on average 1.175) internal successors, (141), 120 states have internal predecessors, (141), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 16:56:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2022-11-25 16:56:48,651 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 59 [2022-11-25 16:56:48,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:48,651 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2022-11-25 16:56:48,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 16:56:48,652 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2022-11-25 16:56:48,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-25 16:56:48,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:48,653 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 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] [2022-11-25 16:56:48,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:48,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:48,860 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:48,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:48,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1961832173, now seen corresponding path program 6 times [2022-11-25 16:56:48,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:48,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860809220] [2022-11-25 16:56:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:48,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:48,875 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:48,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956818469] [2022-11-25 16:56:48,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 16:56:48,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:48,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:48,877 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:48,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 16:56:48,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-25 16:56:48,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:56:48,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 16:56:48,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 16:56:49,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 16:56:49,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:49,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860809220] [2022-11-25 16:56:49,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:49,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956818469] [2022-11-25 16:56:49,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956818469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:49,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:56:49,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-25 16:56:49,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939559391] [2022-11-25 16:56:49,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:49,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:56:49,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:56:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:56:49,255 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 16:56:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:49,735 INFO L93 Difference]: Finished difference Result 200 states and 232 transitions. [2022-11-25 16:56:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 16:56:49,736 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-11-25 16:56:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:49,737 INFO L225 Difference]: With dead ends: 200 [2022-11-25 16:56:49,737 INFO L226 Difference]: Without dead ends: 196 [2022-11-25 16:56:49,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2022-11-25 16:56:49,739 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 80 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:49,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 141 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:56:49,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-25 16:56:49,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 155. [2022-11-25 16:56:49,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 137 states have (on average 1.1824817518248176) internal successors, (162), 137 states have internal predecessors, (162), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 16:56:49,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2022-11-25 16:56:49,792 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 59 [2022-11-25 16:56:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:49,793 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2022-11-25 16:56:49,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 16:56:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2022-11-25 16:56:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-25 16:56:49,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:49,795 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 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, 1, 1, 1, 1] [2022-11-25 16:56:49,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:49,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 16:56:49,998 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:49,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:49,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1029790343, now seen corresponding path program 7 times [2022-11-25 16:56:49,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:49,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488554683] [2022-11-25 16:56:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:49,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:50,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:50,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285143288] [2022-11-25 16:56:50,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 16:56:50,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:50,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:50,013 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:50,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 16:56:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:50,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 16:56:50,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 16:56:50,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 16:56:50,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:50,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488554683] [2022-11-25 16:56:50,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:50,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285143288] [2022-11-25 16:56:50,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285143288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:50,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:56:50,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-25 16:56:50,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092599103] [2022-11-25 16:56:50,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:50,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 16:56:50,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:50,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 16:56:50,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-25 16:56:50,396 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 16:56:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:50,730 INFO L93 Difference]: Finished difference Result 203 states and 231 transitions. [2022-11-25 16:56:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 16:56:50,730 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2022-11-25 16:56:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:50,732 INFO L225 Difference]: With dead ends: 203 [2022-11-25 16:56:50,732 INFO L226 Difference]: Without dead ends: 158 [2022-11-25 16:56:50,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2022-11-25 16:56:50,733 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 93 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:50,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 98 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:56:50,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-25 16:56:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 145. [2022-11-25 16:56:50,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 130 states have (on average 1.146153846153846) internal successors, (149), 130 states have internal predecessors, (149), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 16:56:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 167 transitions. [2022-11-25 16:56:50,772 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 167 transitions. Word has length 64 [2022-11-25 16:56:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:50,773 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 167 transitions. [2022-11-25 16:56:50,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 16:56:50,773 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 167 transitions. [2022-11-25 16:56:50,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 16:56:50,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:50,774 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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, 1, 1, 1, 1] [2022-11-25 16:56:50,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:50,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:50,978 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:50,978 INFO L85 PathProgramCache]: Analyzing trace with hash -188754233, now seen corresponding path program 8 times [2022-11-25 16:56:50,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:50,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717963676] [2022-11-25 16:56:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:50,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:50,991 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:50,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401928915] [2022-11-25 16:56:50,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 16:56:50,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:50,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:50,993 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:51,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 16:56:51,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 16:56:51,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 16:56:51,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 16:56:51,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-25 16:56:51,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:56:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-25 16:56:51,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:56:51,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717963676] [2022-11-25 16:56:51,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:56:51,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401928915] [2022-11-25 16:56:51,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401928915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 16:56:51,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 16:56:51,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-25 16:56:51,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631405725] [2022-11-25 16:56:51,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 16:56:51,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 16:56:51,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:56:51,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 16:56:51,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-25 16:56:51,305 INFO L87 Difference]: Start difference. First operand 145 states and 167 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 16:56:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:56:51,688 INFO L93 Difference]: Finished difference Result 238 states and 275 transitions. [2022-11-25 16:56:51,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 16:56:51,689 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2022-11-25 16:56:51,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:56:51,690 INFO L225 Difference]: With dead ends: 238 [2022-11-25 16:56:51,690 INFO L226 Difference]: Without dead ends: 178 [2022-11-25 16:56:51,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-25 16:56:51,692 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 16:56:51,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 149 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 16:56:51,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-25 16:56:51,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 154. [2022-11-25 16:56:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 139 states have (on average 1.143884892086331) internal successors, (159), 139 states have internal predecessors, (159), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 16:56:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 177 transitions. [2022-11-25 16:56:51,736 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 177 transitions. Word has length 68 [2022-11-25 16:56:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:56:51,736 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 177 transitions. [2022-11-25 16:56:51,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 16:56:51,736 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 177 transitions. [2022-11-25 16:56:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 16:56:51,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:56:51,737 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:56:51,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 16:56:51,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 16:56:51,942 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:56:51,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:56:51,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1359141662, now seen corresponding path program 1 times [2022-11-25 16:56:51,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:56:51,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574856125] [2022-11-25 16:56:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:51,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:56:51,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:56:51,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319622240] [2022-11-25 16:56:51,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:56:51,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:56:51,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:56:51,961 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:56:51,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 16:56:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:56:52,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-25 16:56:52,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:56:52,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-25 16:56:52,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2022-11-25 16:56:53,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:53,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:53,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:53,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:56:53,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-11-25 16:56:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:53,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:53,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:53,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:53,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:53,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:56:53,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2022-11-25 16:56:53,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:53,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:53,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:53,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:56:53,995 INFO L321 Elim1Store]: treesize reduction 113, result has 45.4 percent of original size [2022-11-25 16:56:53,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 126 [2022-11-25 16:57:00,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:57:00,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:57:00,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:57:00,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:57:00,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:57:00,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:57:00,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 16:57:01,338 INFO L321 Elim1Store]: treesize reduction 579, result has 20.5 percent of original size [2022-11-25 16:57:01,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 8 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 43 case distinctions, treesize of input 235 treesize of output 241 [2022-11-25 16:57:08,595 INFO L321 Elim1Store]: treesize reduction 206, result has 48.8 percent of original size [2022-11-25 16:57:08,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 270 treesize of output 288 [2022-11-25 16:59:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 16:59:01,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:59:06,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:06,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574856125] [2022-11-25 16:59:06,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:59:06,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319622240] [2022-11-25 16:59:06,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319622240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:06,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:59:06,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-11-25 16:59:06,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911190959] [2022-11-25 16:59:06,936 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 16:59:06,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 16:59:06,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:06,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 16:59:06,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=3067, Unknown=1, NotChecked=0, Total=3422 [2022-11-25 16:59:06,939 INFO L87 Difference]: Start difference. First operand 154 states and 177 transitions. Second operand has 40 states, 39 states have (on average 1.435897435897436) internal successors, (56), 36 states have internal predecessors, (56), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 16:59:10,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 16:59:14,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 16:59:14,735 INFO L93 Difference]: Finished difference Result 200 states and 228 transitions. [2022-11-25 16:59:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 16:59:14,735 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.435897435897436) internal successors, (56), 36 states have internal predecessors, (56), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 72 [2022-11-25 16:59:14,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 16:59:14,737 INFO L225 Difference]: With dead ends: 200 [2022-11-25 16:59:14,737 INFO L226 Difference]: Without dead ends: 180 [2022-11-25 16:59:14,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=499, Invalid=4470, Unknown=1, NotChecked=0, Total=4970 [2022-11-25 16:59:14,739 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 76 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-25 16:59:14,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 291 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1098 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-11-25 16:59:14,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-25 16:59:14,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 165. [2022-11-25 16:59:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 147 states have (on average 1.1428571428571428) internal successors, (168), 147 states have internal predecessors, (168), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 16:59:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 190 transitions. [2022-11-25 16:59:14,816 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 190 transitions. Word has length 72 [2022-11-25 16:59:14,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 16:59:14,817 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 190 transitions. [2022-11-25 16:59:14,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.435897435897436) internal successors, (56), 36 states have internal predecessors, (56), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 16:59:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 190 transitions. [2022-11-25 16:59:14,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 16:59:14,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 16:59:14,819 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 16:59:14,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 16:59:15,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 16:59:15,032 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 16:59:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 16:59:15,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1577996380, now seen corresponding path program 1 times [2022-11-25 16:59:15,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 16:59:15,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080343545] [2022-11-25 16:59:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:15,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 16:59:15,057 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 16:59:15,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146160984] [2022-11-25 16:59:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 16:59:15,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 16:59:15,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 16:59:15,059 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 16:59:15,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 16:59:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 16:59:15,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-25 16:59:15,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 16:59:16,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-25 16:59:16,109 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-11-25 16:59:16,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2022-11-25 16:59:16,433 INFO L321 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2022-11-25 16:59:16,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2022-11-25 16:59:16,599 INFO L321 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2022-11-25 16:59:16,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 49 [2022-11-25 16:59:23,816 INFO L321 Elim1Store]: treesize reduction 139, result has 40.3 percent of original size [2022-11-25 16:59:23,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 122 [2022-11-25 16:59:37,368 INFO L321 Elim1Store]: treesize reduction 711, result has 10.1 percent of original size [2022-11-25 16:59:37,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 251 treesize of output 176 [2022-11-25 16:59:48,916 INFO L321 Elim1Store]: treesize reduction 168, result has 7.2 percent of original size [2022-11-25 16:59:48,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 252 treesize of output 100 [2022-11-25 16:59:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 16:59:49,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:59:51,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 16:59:51,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080343545] [2022-11-25 16:59:51,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 16:59:51,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146160984] [2022-11-25 16:59:51,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146160984] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 16:59:51,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 16:59:51,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-11-25 16:59:51,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865631889] [2022-11-25 16:59:51,898 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 16:59:51,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 16:59:51,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 16:59:51,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 16:59:51,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=2420, Unknown=1, NotChecked=0, Total=2756 [2022-11-25 16:59:51,901 INFO L87 Difference]: Start difference. First operand 165 states and 190 transitions. Second operand has 38 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 35 states have internal predecessors, (56), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 16:59:57,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:00:00,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:00:12,358 WARN L233 SmtUtils]: Spent 7.10s on a formula simplification. DAG size of input: 70 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:00:14,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:00:16,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:00:26,357 WARN L233 SmtUtils]: Spent 7.33s on a formula simplification. DAG size of input: 72 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:00:28,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:00:30,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:00:32,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:00:35,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:00:37,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:00:39,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:00:41,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:00:43,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:00:44,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:00:53,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:00:55,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:00:58,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:01:02,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:01:02,766 INFO L93 Difference]: Finished difference Result 205 states and 232 transitions. [2022-11-25 17:01:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 17:01:02,767 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 35 states have internal predecessors, (56), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 72 [2022-11-25 17:01:02,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:01:02,769 INFO L225 Difference]: With dead ends: 205 [2022-11-25 17:01:02,769 INFO L226 Difference]: Without dead ends: 185 [2022-11-25 17:01:02,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 63.1s TimeCoverageRelationStatistics Valid=466, Invalid=3690, Unknown=4, NotChecked=0, Total=4160 [2022-11-25 17:01:02,770 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 7 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:01:02,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 229 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 863 Invalid, 13 Unknown, 0 Unchecked, 37.6s Time] [2022-11-25 17:01:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-25 17:01:02,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 165. [2022-11-25 17:01:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 147 states have (on average 1.1428571428571428) internal successors, (168), 147 states have internal predecessors, (168), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 17:01:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 190 transitions. [2022-11-25 17:01:02,839 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 190 transitions. Word has length 72 [2022-11-25 17:01:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:01:02,839 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 190 transitions. [2022-11-25 17:01:02,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 35 states have internal predecessors, (56), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 17:01:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 190 transitions. [2022-11-25 17:01:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 17:01:02,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:01:02,841 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:02,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:03,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:01:03,044 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:01:03,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:03,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2018673184, now seen corresponding path program 2 times [2022-11-25 17:01:03,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:03,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681871815] [2022-11-25 17:01:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:03,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:03,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:01:03,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352105885] [2022-11-25 17:01:03,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:01:03,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:03,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:03,056 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:03,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:01:03,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:01:03,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:03,451 WARN L261 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-25 17:01:03,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:03,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-25 17:01:03,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:03,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2022-11-25 17:01:03,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:03,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:03,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:03,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:03,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-11-25 17:01:04,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:04,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:04,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:04,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:04,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:04,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:01:04,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2022-11-25 17:01:05,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:05,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:05,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:05,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:05,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:05,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:05,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:05,317 INFO L321 Elim1Store]: treesize reduction 108, result has 16.3 percent of original size [2022-11-25 17:01:05,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 73 treesize of output 68 [2022-11-25 17:01:05,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:05,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:05,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:05,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:05,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:05,972 INFO L321 Elim1Store]: treesize reduction 97, result has 49.2 percent of original size [2022-11-25 17:01:05,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 122 [2022-11-25 17:01:09,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:09,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:09,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:01:09,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:09,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:09,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:09,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:09,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:01:09,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:09,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:01:09,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:01:09,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:01:09,978 INFO L321 Elim1Store]: treesize reduction 356, result has 6.6 percent of original size [2022-11-25 17:01:09,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 250 treesize of output 112 [2022-11-25 17:01:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 17:01:10,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:12,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:12,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681871815] [2022-11-25 17:01:12,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:01:12,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352105885] [2022-11-25 17:01:12,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352105885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:01:12,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:01:12,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-11-25 17:01:12,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033761040] [2022-11-25 17:01:12,613 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:12,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 17:01:12,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:12,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 17:01:12,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=2511, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 17:01:12,616 INFO L87 Difference]: Start difference. First operand 165 states and 190 transitions. Second operand has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 36 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:01:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:01:16,261 INFO L93 Difference]: Finished difference Result 212 states and 242 transitions. [2022-11-25 17:01:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-25 17:01:16,261 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 36 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2022-11-25 17:01:16,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:01:16,263 INFO L225 Difference]: With dead ends: 212 [2022-11-25 17:01:16,263 INFO L226 Difference]: Without dead ends: 192 [2022-11-25 17:01:16,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=463, Invalid=3569, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 17:01:16,265 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 92 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:01:16,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 315 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 17:01:16,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-25 17:01:16,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 176. [2022-11-25 17:01:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 155 states have (on average 1.1419354838709677) internal successors, (177), 155 states have internal predecessors, (177), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 17:01:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 203 transitions. [2022-11-25 17:01:16,323 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 203 transitions. Word has length 72 [2022-11-25 17:01:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:01:16,324 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 203 transitions. [2022-11-25 17:01:16,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 36 states have internal predecessors, (52), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:01:16,324 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 203 transitions. [2022-11-25 17:01:16,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-25 17:01:16,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:01:16,325 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:16,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-25 17:01:16,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:01:16,531 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:01:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2008335631, now seen corresponding path program 9 times [2022-11-25 17:01:16,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:16,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846460689] [2022-11-25 17:01:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:16,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:16,544 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:01:16,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747641131] [2022-11-25 17:01:16,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:01:16,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:16,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:16,546 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:16,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:01:16,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-25 17:01:16,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:16,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:01:16,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-25 17:01:17,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:01:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-25 17:01:17,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:01:17,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846460689] [2022-11-25 17:01:17,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:01:17,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747641131] [2022-11-25 17:01:17,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747641131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:01:17,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:01:17,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-25 17:01:17,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510860054] [2022-11-25 17:01:17,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:01:17,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 17:01:17,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:01:17,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 17:01:17,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:01:17,098 INFO L87 Difference]: Start difference. First operand 176 states and 203 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:01:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:01:17,385 INFO L93 Difference]: Finished difference Result 270 states and 308 transitions. [2022-11-25 17:01:17,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:01:17,387 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2022-11-25 17:01:17,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:01:17,389 INFO L225 Difference]: With dead ends: 270 [2022-11-25 17:01:17,389 INFO L226 Difference]: Without dead ends: 162 [2022-11-25 17:01:17,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:01:17,390 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:01:17,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 115 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:01:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-25 17:01:17,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2022-11-25 17:01:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 139 states have (on average 1.1223021582733812) internal successors, (156), 139 states have internal predecessors, (156), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 17:01:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2022-11-25 17:01:17,440 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 77 [2022-11-25 17:01:17,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:01:17,440 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2022-11-25 17:01:17,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:01:17,440 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2022-11-25 17:01:17,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 17:01:17,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:01:17,442 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:01:17,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:01:17,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:17,649 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:01:17,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:01:17,649 INFO L85 PathProgramCache]: Analyzing trace with hash -52720655, now seen corresponding path program 2 times [2022-11-25 17:01:17,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:01:17,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847399598] [2022-11-25 17:01:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:01:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:01:17,660 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:01:17,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895017087] [2022-11-25 17:01:17,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:01:17,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:01:17,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:01:17,662 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:01:17,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b621be3b-8ff6-49d9-8883-4b3bd3c99101/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:01:18,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:01:18,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:01:18,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-25 17:01:18,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:01:18,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-25 17:01:18,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2022-11-25 17:01:18,562 INFO L321 Elim1Store]: treesize reduction 73, result has 30.5 percent of original size [2022-11-25 17:01:18,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 54 [2022-11-25 17:01:18,725 INFO L321 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2022-11-25 17:01:18,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 49 [2022-11-25 17:01:31,223 INFO L321 Elim1Store]: treesize reduction 181, result has 27.3 percent of original size [2022-11-25 17:01:31,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 100 [2022-11-25 17:01:51,110 INFO L321 Elim1Store]: treesize reduction 425, result has 35.9 percent of original size [2022-11-25 17:01:51,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 130 treesize of output 301 [2022-11-25 17:02:28,599 WARN L233 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 260 DAG size of output: 141 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-25 17:02:28,602 INFO L321 Elim1Store]: treesize reduction 703, result has 38.7 percent of original size [2022-11-25 17:02:28,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 254 treesize of output 596