./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array4_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 11:44:18,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:44:18,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:44:18,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:44:18,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:44:18,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:44:18,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:44:18,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:44:18,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:44:18,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:44:18,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:44:18,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:44:18,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:44:18,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:44:18,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:44:18,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:44:18,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:44:18,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:44:18,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:44:18,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:44:18,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:44:18,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:44:18,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:44:18,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:44:18,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:44:18,287 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:44:18,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:44:18,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:44:18,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:44:18,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:44:18,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:44:18,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:44:18,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:44:18,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:44:18,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:44:18,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:44:18,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:44:18,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:44:18,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:44:18,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:44:18,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:44:18,295 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 11:44:18,314 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:44:18,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:44:18,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:44:18,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:44:18,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:44:18,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:44:18,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:44:18,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:44:18,322 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:44:18,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:44:18,322 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:44:18,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:44:18,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:44:18,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:44:18,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:44:18,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:44:18,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:44:18,324 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:44:18,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:44:18,324 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:44:18,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:44:18,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:44:18,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:44:18,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:44:18,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:44:18,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:44:18,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:44:18,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:44:18,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:44:18,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:44:18,326 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:44:18,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:44:18,327 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:44:18,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:44:18,327 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:44:18,327 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_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2022-12-13 11:44:18,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:44:18,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:44:18,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:44:18,508 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:44:18,509 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:44:18,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-patterns/array4_pattern.c [2022-12-13 11:44:21,154 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:44:21,286 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:44:21,286 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/sv-benchmarks/c/array-patterns/array4_pattern.c [2022-12-13 11:44:21,290 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/data/0c5e1a22e/67905e7d32b2463a8ac47992554245b4/FLAGafdb6df2a [2022-12-13 11:44:21,302 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/data/0c5e1a22e/67905e7d32b2463a8ac47992554245b4 [2022-12-13 11:44:21,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:44:21,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:44:21,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:44:21,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:44:21,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:44:21,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:44:21" (1/1) ... [2022-12-13 11:44:21,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d323dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:21, skipping insertion in model container [2022-12-13 11:44:21,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:44:21" (1/1) ... [2022-12-13 11:44:21,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:44:21,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:44:21,442 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_8ce7e0b3-287d-400f-8dcd-f317524d3a20/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2022-12-13 11:44:21,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:44:21,467 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:44:21,476 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_8ce7e0b3-287d-400f-8dcd-f317524d3a20/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2022-12-13 11:44:21,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:44:21,501 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:44:21,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:21 WrapperNode [2022-12-13 11:44:21,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:44:21,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:44:21,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:44:21,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:44:21,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:21" (1/1) ... [2022-12-13 11:44:21,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:21" (1/1) ... [2022-12-13 11:44:21,531 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2022-12-13 11:44:21,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:44:21,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:44:21,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:44:21,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:44:21,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:21" (1/1) ... [2022-12-13 11:44:21,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:21" (1/1) ... [2022-12-13 11:44:21,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:21" (1/1) ... [2022-12-13 11:44:21,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:21" (1/1) ... [2022-12-13 11:44:21,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:21" (1/1) ... [2022-12-13 11:44:21,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:21" (1/1) ... [2022-12-13 11:44:21,552 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:21" (1/1) ... [2022-12-13 11:44:21,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:21" (1/1) ... [2022-12-13 11:44:21,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:44:21,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:44:21,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:44:21,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:44:21,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:21" (1/1) ... [2022-12-13 11:44:21,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:44:21,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:44:21,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:44:21,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:44:21,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:44:21,613 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 11:44:21,613 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 11:44:21,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:44:21,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:44:21,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:44:21,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:44:21,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:44:21,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:44:21,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:44:21,671 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:44:21,673 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:44:21,796 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:44:21,801 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:44:21,801 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 11:44:21,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:44:21 BoogieIcfgContainer [2022-12-13 11:44:21,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:44:21,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:44:21,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:44:21,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:44:21,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:44:21" (1/3) ... [2022-12-13 11:44:21,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3970d981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:44:21, skipping insertion in model container [2022-12-13 11:44:21,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:21" (2/3) ... [2022-12-13 11:44:21,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3970d981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:44:21, skipping insertion in model container [2022-12-13 11:44:21,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:44:21" (3/3) ... [2022-12-13 11:44:21,809 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2022-12-13 11:44:21,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:44:21,823 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 11:44:21,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:44:21,865 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;@24d14cfe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:44:21,866 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 11:44:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 11:44:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 11:44:21,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:44:21,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:44:21,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:44:21,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:21,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1359011546, now seen corresponding path program 1 times [2022-12-13 11:44:21,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:21,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926945534] [2022-12-13 11:44:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:21,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:22,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:44:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:22,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:22,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926945534] [2022-12-13 11:44:22,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926945534] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:44:22,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:44:22,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:44:22,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777229291] [2022-12-13 11:44:22,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:44:22,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 11:44:22,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:22,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 11:44:22,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 11:44:22,051 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-12-13 11:44:22,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:44:22,067 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2022-12-13 11:44:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 11:44:22,069 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 16 [2022-12-13 11:44:22,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:44:22,074 INFO L225 Difference]: With dead ends: 63 [2022-12-13 11:44:22,075 INFO L226 Difference]: Without dead ends: 29 [2022-12-13 11:44:22,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 11:44:22,079 INFO L413 NwaCegarLoop]: 40 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, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:44:22,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:44:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-13 11:44:22,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-13 11:44:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 11:44:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-12-13 11:44:22,108 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2022-12-13 11:44:22,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:44:22,108 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-12-13 11:44:22,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2022-12-13 11:44:22,109 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-12-13 11:44:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 11:44:22,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:44:22,110 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:44:22,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:44:22,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:44:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:22,111 INFO L85 PathProgramCache]: Analyzing trace with hash -852430543, now seen corresponding path program 1 times [2022-12-13 11:44:22,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:22,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812652319] [2022-12-13 11:44:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:22,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:22,145 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:44:22,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674829638] [2022-12-13 11:44:22,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:22,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:22,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:44:22,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:44:22,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:44:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:22,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 11:44:22,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 11:44:22,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:44:22,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:22,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812652319] [2022-12-13 11:44:22,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:44:22,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674829638] [2022-12-13 11:44:22,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674829638] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:44:22,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:44:22,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:44:22,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134770407] [2022-12-13 11:44:22,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:44:22,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:44:22,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:22,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:44:22,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:44:22,282 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 11:44:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:44:22,397 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2022-12-13 11:44:22,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:44:22,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-12-13 11:44:22,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:44:22,398 INFO L225 Difference]: With dead ends: 70 [2022-12-13 11:44:22,398 INFO L226 Difference]: Without dead ends: 48 [2022-12-13 11:44:22,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:44:22,400 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:44:22,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:44:22,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-13 11:44:22,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-12-13 11:44:22,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 11:44:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-12-13 11:44:22,405 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 42 [2022-12-13 11:44:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:44:22,406 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-12-13 11:44:22,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 11:44:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-12-13 11:44:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 11:44:22,407 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:44:22,407 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:44:22,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:44:22,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:22,610 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:44:22,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:22,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1661777169, now seen corresponding path program 1 times [2022-12-13 11:44:22,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:22,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067315815] [2022-12-13 11:44:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:22,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:22,692 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:44:22,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248402375] [2022-12-13 11:44:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:22,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:22,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:44:22,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:44:22,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:44:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:22,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:44:22,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 11:44:22,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:44:22,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:22,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067315815] [2022-12-13 11:44:22,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:44:22,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248402375] [2022-12-13 11:44:22,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248402375] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:44:22,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:44:22,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:44:22,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972432458] [2022-12-13 11:44:22,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:44:22,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:44:22,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:22,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:44:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:44:22,863 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 11:44:22,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:44:22,880 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-12-13 11:44:22,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:44:22,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2022-12-13 11:44:22,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:44:22,881 INFO L225 Difference]: With dead ends: 43 [2022-12-13 11:44:22,881 INFO L226 Difference]: Without dead ends: 39 [2022-12-13 11:44:22,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:44:22,883 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:44:22,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:44:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-13 11:44:22,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-12-13 11:44:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 11:44:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2022-12-13 11:44:22,889 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 42 [2022-12-13 11:44:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:44:22,889 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2022-12-13 11:44:22,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 11:44:22,890 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2022-12-13 11:44:22,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 11:44:22,890 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:44:22,890 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:44:22,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:44:23,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:23,092 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:44:23,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:23,094 INFO L85 PathProgramCache]: Analyzing trace with hash 813208561, now seen corresponding path program 1 times [2022-12-13 11:44:23,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:23,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407744305] [2022-12-13 11:44:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:23,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:23,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:44:23,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395426907] [2022-12-13 11:44:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:23,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:23,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:44:23,196 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:44:23,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:44:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:23,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 11:44:23,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 11:44:23,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:44:23,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:23,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407744305] [2022-12-13 11:44:23,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:44:23,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395426907] [2022-12-13 11:44:23,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395426907] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:44:23,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:44:23,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:44:23,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399173868] [2022-12-13 11:44:23,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:44:23,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:44:23,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:44:23,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:44:23,367 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-12-13 11:44:23,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:44:23,445 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2022-12-13 11:44:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:44:23,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 44 [2022-12-13 11:44:23,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:44:23,446 INFO L225 Difference]: With dead ends: 77 [2022-12-13 11:44:23,446 INFO L226 Difference]: Without dead ends: 43 [2022-12-13 11:44:23,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:44:23,448 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:44:23,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 102 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:44:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-13 11:44:23,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-12-13 11:44:23,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 11:44:23,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-12-13 11:44:23,454 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 44 [2022-12-13 11:44:23,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:44:23,455 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-12-13 11:44:23,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-12-13 11:44:23,455 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-12-13 11:44:23,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 11:44:23,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:44:23,457 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:44:23,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:44:23,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:23,659 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:44:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:23,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1843316237, now seen corresponding path program 1 times [2022-12-13 11:44:23,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:23,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020500161] [2022-12-13 11:44:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:23,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:23,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:44:23,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001145744] [2022-12-13 11:44:23,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:23,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:23,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:44:23,742 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:44:23,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:44:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:23,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 11:44:23,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:23,921 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 10 treesize of output 8 [2022-12-13 11:44:23,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:44:23,970 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 18 treesize of output 18 [2022-12-13 11:44:23,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-12-13 11:44:24,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:44:24,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 28 [2022-12-13 11:44:24,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:44:24,839 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-13 11:44:24,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 17 [2022-12-13 11:44:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 11:44:24,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:44:35,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:35,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020500161] [2022-12-13 11:44:35,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:44:35,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001145744] [2022-12-13 11:44:35,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001145744] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:44:35,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:44:35,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-12-13 11:44:35,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918590172] [2022-12-13 11:44:35,589 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 11:44:35,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 11:44:35,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:35,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 11:44:35,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=456, Unknown=4, NotChecked=0, Total=552 [2022-12-13 11:44:35,591 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 11:44:38,560 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] [2022-12-13 11:44:40,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 11:44:43,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-13 11:44:45,714 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] [2022-12-13 11:44:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:44:45,715 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2022-12-13 11:44:45,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 11:44:45,717 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2022-12-13 11:44:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:44:45,718 INFO L225 Difference]: With dead ends: 83 [2022-12-13 11:44:45,718 INFO L226 Difference]: Without dead ends: 79 [2022-12-13 11:44:45,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=237, Invalid=1241, Unknown=4, NotChecked=0, Total=1482 [2022-12-13 11:44:45,720 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 94 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 58 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:44:45,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 187 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 502 Invalid, 4 Unknown, 0 Unchecked, 9.0s Time] [2022-12-13 11:44:45,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-13 11:44:45,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2022-12-13 11:44:45,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 11:44:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2022-12-13 11:44:45,735 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 46 [2022-12-13 11:44:45,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:44:45,736 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2022-12-13 11:44:45,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 11:44:45,736 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2022-12-13 11:44:45,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 11:44:45,737 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:44:45,737 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:44:45,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 11:44:45,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:45,939 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:44:45,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:45,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1847143947, now seen corresponding path program 2 times [2022-12-13 11:44:45,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:45,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534578395] [2022-12-13 11:44:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:45,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:45,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:44:45,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867103676] [2022-12-13 11:44:45,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:44:45,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:45,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:44:45,991 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:44:45,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:44:46,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:44:46,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:44:46,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:44:46,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 11:44:46,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:44:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 11:44:46,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:46,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534578395] [2022-12-13 11:44:46,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:44:46,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867103676] [2022-12-13 11:44:46,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867103676] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:44:46,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:44:46,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-12-13 11:44:46,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753143639] [2022-12-13 11:44:46,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:44:46,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 11:44:46,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:46,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 11:44:46,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-13 11:44:46,336 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 11:44:46,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:44:46,673 INFO L93 Difference]: Finished difference Result 150 states and 186 transitions. [2022-12-13 11:44:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 11:44:46,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2022-12-13 11:44:46,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:44:46,675 INFO L225 Difference]: With dead ends: 150 [2022-12-13 11:44:46,675 INFO L226 Difference]: Without dead ends: 123 [2022-12-13 11:44:46,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:44:46,676 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 76 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 11:44:46,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 185 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 11:44:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-12-13 11:44:46,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2022-12-13 11:44:46,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 75 states have internal predecessors, (83), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-13 11:44:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2022-12-13 11:44:46,700 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 48 [2022-12-13 11:44:46,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:44:46,701 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2022-12-13 11:44:46,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 11:44:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2022-12-13 11:44:46,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 11:44:46,702 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:44:46,702 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:44:46,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 11:44:46,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 11:44:46,903 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:44:46,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:46,903 INFO L85 PathProgramCache]: Analyzing trace with hash 741894005, now seen corresponding path program 3 times [2022-12-13 11:44:46,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:46,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961173954] [2022-12-13 11:44:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:46,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:46,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:44:46,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710095701] [2022-12-13 11:44:46,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:44:46,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:46,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:44:46,925 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:44:46,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:44:46,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 11:44:46,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:44:46,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 11:44:46,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:46,997 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 10 treesize of output 8 [2022-12-13 11:44:47,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:44:47,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-12-13 11:44:47,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-12-13 11:44:47,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-12-13 11:44:47,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 13 [2022-12-13 11:44:47,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:44:47,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 38 [2022-12-13 11:44:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 11:44:48,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:44:48,410 INFO L321 Elim1Store]: treesize reduction 20, result has 64.3 percent of original size [2022-12-13 11:44:48,411 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 111 [2022-12-13 11:44:48,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:44:48,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 155 [2022-12-13 11:44:48,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:44:48,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 156 [2022-12-13 11:44:48,504 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 54 treesize of output 52 [2022-12-13 11:44:48,675 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 35 treesize of output 33 [2022-12-13 11:44:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 11:44:49,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:49,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961173954] [2022-12-13 11:44:49,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:44:49,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710095701] [2022-12-13 11:44:49,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710095701] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:44:49,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:44:49,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2022-12-13 11:44:49,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850407476] [2022-12-13 11:44:49,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:44:49,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 11:44:49,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:49,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 11:44:49,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-12-13 11:44:49,417 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-13 11:44:56,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:44:56,966 INFO L93 Difference]: Finished difference Result 140 states and 178 transitions. [2022-12-13 11:44:56,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 11:44:56,966 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2022-12-13 11:44:56,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:44:56,969 INFO L225 Difference]: With dead ends: 140 [2022-12-13 11:44:56,969 INFO L226 Difference]: Without dead ends: 75 [2022-12-13 11:44:56,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1047, Invalid=4653, Unknown=0, NotChecked=0, Total=5700 [2022-12-13 11:44:56,972 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 321 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:44:56,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 312 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-13 11:44:56,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-13 11:44:56,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2022-12-13 11:44:56,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 45 states have internal predecessors, (49), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-12-13 11:44:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2022-12-13 11:44:56,983 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 48 [2022-12-13 11:44:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:44:56,983 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2022-12-13 11:44:56,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-13 11:44:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2022-12-13 11:44:56,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 11:44:56,984 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:44:56,984 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:44:56,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 11:44:57,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 11:44:57,186 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:44:57,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:57,187 INFO L85 PathProgramCache]: Analyzing trace with hash 48801527, now seen corresponding path program 4 times [2022-12-13 11:44:57,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:57,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109436721] [2022-12-13 11:44:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:57,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:57,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:44:57,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845323324] [2022-12-13 11:44:57,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:44:57,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:57,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:44:57,234 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:44:57,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 11:44:57,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:44:57,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:44:57,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 87 conjunts are in the unsatisfiable core [2022-12-13 11:44:57,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:57,337 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 10 treesize of output 8 [2022-12-13 11:44:57,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:44:57,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-12-13 11:44:57,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-12-13 11:44:57,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-12-13 11:44:57,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-12-13 11:44:57,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2022-12-13 11:44:59,683 INFO L321 Elim1Store]: treesize reduction 64, result has 47.1 percent of original size [2022-12-13 11:44:59,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 93 [2022-12-13 11:45:00,675 INFO L321 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-12-13 11:45:00,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 48 [2022-12-13 11:45:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 11:45:00,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:02,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:02,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109436721] [2022-12-13 11:45:02,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:45:02,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845323324] [2022-12-13 11:45:02,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845323324] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:02,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:45:02,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-12-13 11:45:02,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400637577] [2022-12-13 11:45:02,954 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:02,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:45:02,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:02,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:45:02,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 11:45:02,957 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 11:45:05,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:45:05,055 INFO L93 Difference]: Finished difference Result 136 states and 171 transitions. [2022-12-13 11:45:05,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 11:45:05,056 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 50 [2022-12-13 11:45:05,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:45:05,056 INFO L225 Difference]: With dead ends: 136 [2022-12-13 11:45:05,057 INFO L226 Difference]: Without dead ends: 98 [2022-12-13 11:45:05,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 11:45:05,057 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 39 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:45:05,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 274 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 11:45:05,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-13 11:45:05,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2022-12-13 11:45:05,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 61 states have internal predecessors, (67), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-13 11:45:05,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-12-13 11:45:05,072 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 50 [2022-12-13 11:45:05,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:45:05,072 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-12-13 11:45:05,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 11:45:05,073 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-12-13 11:45:05,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 11:45:05,073 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:45:05,073 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-12-13 11:45:05,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 11:45:05,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:05,275 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:45:05,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:05,275 INFO L85 PathProgramCache]: Analyzing trace with hash -293138951, now seen corresponding path program 5 times [2022-12-13 11:45:05,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:05,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319557933] [2022-12-13 11:45:05,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:05,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:05,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:45:05,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266052837] [2022-12-13 11:45:05,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:45:05,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:05,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:05,304 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:05,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 11:45:05,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-13 11:45:05,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:05,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:45:05,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 11:45:05,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 11:45:05,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:05,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319557933] [2022-12-13 11:45:05,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:45:05,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266052837] [2022-12-13 11:45:05,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266052837] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:05,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:45:05,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-12-13 11:45:05,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729108823] [2022-12-13 11:45:05,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:05,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:45:05,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:05,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:45:05,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:45:05,773 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 11:45:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:45:06,299 INFO L93 Difference]: Finished difference Result 202 states and 257 transitions. [2022-12-13 11:45:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:45:06,300 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2022-12-13 11:45:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:45:06,302 INFO L225 Difference]: With dead ends: 202 [2022-12-13 11:45:06,302 INFO L226 Difference]: Without dead ends: 160 [2022-12-13 11:45:06,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:45:06,303 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 113 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:45:06,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 222 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 11:45:06,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-13 11:45:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 133. [2022-12-13 11:45:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 95 states have internal predecessors, (105), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-12-13 11:45:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 171 transitions. [2022-12-13 11:45:06,332 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 171 transitions. Word has length 52 [2022-12-13 11:45:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:45:06,332 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 171 transitions. [2022-12-13 11:45:06,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 11:45:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 171 transitions. [2022-12-13 11:45:06,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 11:45:06,333 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:45:06,333 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-12-13 11:45:06,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 11:45:06,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:06,534 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:45:06,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:06,534 INFO L85 PathProgramCache]: Analyzing trace with hash 986268537, now seen corresponding path program 6 times [2022-12-13 11:45:06,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:06,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731192782] [2022-12-13 11:45:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:06,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:06,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:45:06,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470116117] [2022-12-13 11:45:06,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:45:06,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:06,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:06,557 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:06,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 11:45:06,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-12-13 11:45:06,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:06,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:45:06,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 11:45:06,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 11:45:07,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:07,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731192782] [2022-12-13 11:45:07,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:45:07,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470116117] [2022-12-13 11:45:07,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470116117] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:07,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:45:07,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-12-13 11:45:07,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583871169] [2022-12-13 11:45:07,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:07,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:45:07,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:07,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:45:07,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:45:07,061 INFO L87 Difference]: Start difference. First operand 133 states and 171 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 11:45:07,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:45:07,528 INFO L93 Difference]: Finished difference Result 148 states and 185 transitions. [2022-12-13 11:45:07,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:45:07,529 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2022-12-13 11:45:07,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:45:07,530 INFO L225 Difference]: With dead ends: 148 [2022-12-13 11:45:07,530 INFO L226 Difference]: Without dead ends: 144 [2022-12-13 11:45:07,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-12-13 11:45:07,530 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 85 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 11:45:07,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 226 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 11:45:07,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-12-13 11:45:07,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 135. [2022-12-13 11:45:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 96 states have (on average 1.1145833333333333) internal successors, (107), 97 states have internal predecessors, (107), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-12-13 11:45:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 173 transitions. [2022-12-13 11:45:07,558 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 173 transitions. Word has length 52 [2022-12-13 11:45:07,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:45:07,558 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 173 transitions. [2022-12-13 11:45:07,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 11:45:07,558 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 173 transitions. [2022-12-13 11:45:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 11:45:07,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:45:07,559 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 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] [2022-12-13 11:45:07,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 11:45:07,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 11:45:07,761 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:45:07,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:07,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1330474501, now seen corresponding path program 7 times [2022-12-13 11:45:07,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:07,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333119983] [2022-12-13 11:45:07,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:07,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:07,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:45:07,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368781013] [2022-12-13 11:45:07,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:45:07,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:07,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:07,808 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:07,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 11:45:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:07,910 WARN L261 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 102 conjunts are in the unsatisfiable core [2022-12-13 11:45:07,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:07,965 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 10 treesize of output 8 [2022-12-13 11:45:08,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:45:08,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-12-13 11:45:08,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-12-13 11:45:08,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-12-13 11:45:08,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-12-13 11:45:08,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:45:08,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:45:08,203 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 0 case distinctions, treesize of input 54 treesize of output 43 [2022-12-13 11:45:08,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:45:08,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:45:08,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:45:08,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:45:08,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 73 [2022-12-13 11:45:11,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:45:11,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:45:11,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:45:11,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:45:11,529 INFO L321 Elim1Store]: treesize reduction 98, result has 47.0 percent of original size [2022-12-13 11:45:11,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 129 [2022-12-13 11:45:13,743 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-12-13 11:45:13,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 80 [2022-12-13 11:45:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:45:13,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:15,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:15,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333119983] [2022-12-13 11:45:15,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:45:15,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368781013] [2022-12-13 11:45:15,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368781013] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:15,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:45:15,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-12-13 11:45:15,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092016794] [2022-12-13 11:45:15,933 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:15,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 11:45:15,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:15,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 11:45:15,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 11:45:15,934 INFO L87 Difference]: Start difference. First operand 135 states and 173 transitions. Second operand has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 11:45:21,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:45:21,501 INFO L93 Difference]: Finished difference Result 177 states and 224 transitions. [2022-12-13 11:45:21,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 11:45:21,501 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2022-12-13 11:45:21,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:45:21,502 INFO L225 Difference]: With dead ends: 177 [2022-12-13 11:45:21,502 INFO L226 Difference]: Without dead ends: 173 [2022-12-13 11:45:21,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=405, Invalid=3377, Unknown=0, NotChecked=0, Total=3782 [2022-12-13 11:45:21,503 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 102 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:45:21,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 400 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-13 11:45:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-12-13 11:45:21,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2022-12-13 11:45:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 112 states have (on average 1.1160714285714286) internal successors, (125), 113 states have internal predecessors, (125), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-13 11:45:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 199 transitions. [2022-12-13 11:45:21,533 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 199 transitions. Word has length 54 [2022-12-13 11:45:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:45:21,533 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 199 transitions. [2022-12-13 11:45:21,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 28 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 11:45:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 199 transitions. [2022-12-13 11:45:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 11:45:21,534 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:45:21,534 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:21,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 11:45:21,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:21,736 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:45:21,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:21,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1367492605, now seen corresponding path program 8 times [2022-12-13 11:45:21,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:21,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460845085] [2022-12-13 11:45:21,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:21,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:21,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:45:21,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184486570] [2022-12-13 11:45:21,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:45:21,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:21,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:21,775 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:21,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 11:45:21,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:45:21,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:21,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:45:21,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 11:45:22,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 11:45:22,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:22,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460845085] [2022-12-13 11:45:22,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:45:22,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184486570] [2022-12-13 11:45:22,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184486570] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:22,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:45:22,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-12-13 11:45:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024112096] [2022-12-13 11:45:22,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:22,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 11:45:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 11:45:22,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-12-13 11:45:22,330 INFO L87 Difference]: Start difference. First operand 156 states and 199 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 11:45:23,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:45:23,197 INFO L93 Difference]: Finished difference Result 369 states and 478 transitions. [2022-12-13 11:45:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 11:45:23,198 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-12-13 11:45:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:45:23,199 INFO L225 Difference]: With dead ends: 369 [2022-12-13 11:45:23,200 INFO L226 Difference]: Without dead ends: 269 [2022-12-13 11:45:23,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2022-12-13 11:45:23,200 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 242 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:45:23,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 276 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 11:45:23,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-12-13 11:45:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 226. [2022-12-13 11:45:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 157 states have (on average 1.1210191082802548) internal successors, (176), 158 states have internal predecessors, (176), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2022-12-13 11:45:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 298 transitions. [2022-12-13 11:45:23,244 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 298 transitions. Word has length 56 [2022-12-13 11:45:23,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:45:23,245 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 298 transitions. [2022-12-13 11:45:23,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 11:45:23,245 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 298 transitions. [2022-12-13 11:45:23,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 11:45:23,245 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:45:23,245 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:23,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 11:45:23,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:23,447 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:45:23,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:23,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1777525379, now seen corresponding path program 9 times [2022-12-13 11:45:23,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:23,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144244642] [2022-12-13 11:45:23,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:23,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:23,490 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:45:23,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872926896] [2022-12-13 11:45:23,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:45:23,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:23,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:23,492 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:23,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 11:45:23,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-13 11:45:23,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:23,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:45:23,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 11:45:23,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 11:45:24,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:24,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144244642] [2022-12-13 11:45:24,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:45:24,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872926896] [2022-12-13 11:45:24,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872926896] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:24,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:45:24,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-12-13 11:45:24,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294854177] [2022-12-13 11:45:24,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:24,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 11:45:24,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:24,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 11:45:24,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-12-13 11:45:24,144 INFO L87 Difference]: Start difference. First operand 226 states and 298 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 11:45:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:45:25,429 INFO L93 Difference]: Finished difference Result 254 states and 324 transitions. [2022-12-13 11:45:25,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 11:45:25,430 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-12-13 11:45:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:45:25,431 INFO L225 Difference]: With dead ends: 254 [2022-12-13 11:45:25,431 INFO L226 Difference]: Without dead ends: 250 [2022-12-13 11:45:25,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-12-13 11:45:25,431 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 90 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:45:25,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 523 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 11:45:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-12-13 11:45:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 228. [2022-12-13 11:45:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 159 states have (on average 1.119496855345912) internal successors, (178), 160 states have internal predecessors, (178), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2022-12-13 11:45:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 300 transitions. [2022-12-13 11:45:25,480 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 300 transitions. Word has length 56 [2022-12-13 11:45:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:45:25,480 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 300 transitions. [2022-12-13 11:45:25,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 11:45:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 300 transitions. [2022-12-13 11:45:25,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 11:45:25,481 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:45:25,481 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:25,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 11:45:25,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:25,683 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:45:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1248328447, now seen corresponding path program 10 times [2022-12-13 11:45:25,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:25,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546931868] [2022-12-13 11:45:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:25,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:25,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:45:25,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391080379] [2022-12-13 11:45:25,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:45:25,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:25,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:25,737 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:25,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ce7e0b3-287d-400f-8dcd-f317524d3a20/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 11:45:25,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:45:25,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:25,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 125 conjunts are in the unsatisfiable core [2022-12-13 11:45:25,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:25,989 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 10 treesize of output 8 [2022-12-13 11:45:26,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:45:26,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-12-13 11:45:26,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2022-12-13 11:45:26,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-12-13 11:45:26,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-12-13 11:45:26,218 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 0 case distinctions, treesize of input 64 treesize of output 53 [2022-12-13 11:45:26,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 83 [2022-12-13 11:45:26,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 113 [2022-12-13 11:45:31,028 INFO L321 Elim1Store]: treesize reduction 186, result has 47.9 percent of original size [2022-12-13 11:45:31,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 134 treesize of output 219 [2022-12-13 11:45:52,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:45:52,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:45:52,296 INFO L190 IndexEqualityManager]: detected not equals via solver