./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro --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 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb --- 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-8393723 [2022-11-18 21:02:38,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 21:02:38,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 21:02:38,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 21:02:38,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 21:02:38,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 21:02:38,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 21:02:38,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 21:02:38,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 21:02:38,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 21:02:38,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 21:02:38,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 21:02:38,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 21:02:38,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 21:02:38,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 21:02:38,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 21:02:38,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 21:02:38,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 21:02:38,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 21:02:38,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 21:02:38,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 21:02:38,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 21:02:38,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 21:02:38,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 21:02:38,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 21:02:38,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 21:02:38,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 21:02:38,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 21:02:38,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 21:02:38,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 21:02:38,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 21:02:38,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 21:02:38,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 21:02:38,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 21:02:38,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 21:02:38,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 21:02:38,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 21:02:38,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 21:02:38,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 21:02:38,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 21:02:38,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 21:02:38,340 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 21:02:38,380 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 21:02:38,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 21:02:38,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 21:02:38,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 21:02:38,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 21:02:38,382 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 21:02:38,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 21:02:38,383 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 21:02:38,384 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 21:02:38,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 21:02:38,385 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 21:02:38,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 21:02:38,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 21:02:38,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 21:02:38,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 21:02:38,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 21:02:38,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 21:02:38,386 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 21:02:38,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 21:02:38,386 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 21:02:38,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 21:02:38,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 21:02:38,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 21:02:38,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 21:02:38,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:02:38,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 21:02:38,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 21:02:38,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 21:02:38,388 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 21:02:38,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 21:02:38,390 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 21:02:38,390 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 21:02:38,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 21:02:38,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb [2022-11-18 21:02:38,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 21:02:38,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 21:02:38,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 21:02:38,747 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 21:02:38,747 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 21:02:38,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-11-18 21:02:38,816 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/data/44a65bb5b/a813be4244e34778a9439b889db874e1/FLAGfb1d793ba [2022-11-18 21:02:39,373 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 21:02:39,374 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-11-18 21:02:39,381 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/data/44a65bb5b/a813be4244e34778a9439b889db874e1/FLAGfb1d793ba [2022-11-18 21:02:39,743 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/data/44a65bb5b/a813be4244e34778a9439b889db874e1 [2022-11-18 21:02:39,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 21:02:39,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 21:02:39,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 21:02:39,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 21:02:39,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 21:02:39,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:02:39" (1/1) ... [2022-11-18 21:02:39,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a048907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:39, skipping insertion in model container [2022-11-18 21:02:39,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:02:39" (1/1) ... [2022-11-18 21:02:39,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 21:02:39,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 21:02:39,989 WARN L234 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_87386fbd-935d-41db-927a-6a2601f92cf6/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2022-11-18 21:02:40,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:02:40,047 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 21:02:40,062 WARN L234 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_87386fbd-935d-41db-927a-6a2601f92cf6/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2022-11-18 21:02:40,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:02:40,099 INFO L208 MainTranslator]: Completed translation [2022-11-18 21:02:40,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:40 WrapperNode [2022-11-18 21:02:40,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 21:02:40,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 21:02:40,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 21:02:40,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 21:02:40,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:40" (1/1) ... [2022-11-18 21:02:40,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:40" (1/1) ... [2022-11-18 21:02:40,144 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2022-11-18 21:02:40,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 21:02:40,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 21:02:40,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 21:02:40,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 21:02:40,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:40" (1/1) ... [2022-11-18 21:02:40,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:40" (1/1) ... [2022-11-18 21:02:40,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:40" (1/1) ... [2022-11-18 21:02:40,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:40" (1/1) ... [2022-11-18 21:02:40,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:40" (1/1) ... [2022-11-18 21:02:40,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:40" (1/1) ... [2022-11-18 21:02:40,181 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:40" (1/1) ... [2022-11-18 21:02:40,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:40" (1/1) ... [2022-11-18 21:02:40,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 21:02:40,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 21:02:40,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 21:02:40,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 21:02:40,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:40" (1/1) ... [2022-11-18 21:02:40,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:02:40,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:40,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 21:02:40,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 21:02:40,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 21:02:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 21:02:40,278 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 21:02:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 21:02:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 21:02:40,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 21:02:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 21:02:40,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 21:02:40,364 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 21:02:40,367 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 21:02:40,606 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 21:02:40,617 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 21:02:40,617 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 21:02:40,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:02:40 BoogieIcfgContainer [2022-11-18 21:02:40,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 21:02:40,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 21:02:40,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 21:02:40,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 21:02:40,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:02:39" (1/3) ... [2022-11-18 21:02:40,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f47e3d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:02:40, skipping insertion in model container [2022-11-18 21:02:40,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:02:40" (2/3) ... [2022-11-18 21:02:40,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f47e3d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:02:40, skipping insertion in model container [2022-11-18 21:02:40,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:02:40" (3/3) ... [2022-11-18 21:02:40,631 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.c [2022-11-18 21:02:40,649 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 21:02:40,649 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 21:02:40,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:02:40,703 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;@15a5b9aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:02:40,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 21:02:40,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 21:02:40,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 21:02:40,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:40,718 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:40,718 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:40,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:40,724 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2022-11-18 21:02:40,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:40,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040079294] [2022-11-18 21:02:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:40,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:40,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:40,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040079294] [2022-11-18 21:02:40,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 21:02:40,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984156451] [2022-11-18 21:02:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:40,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:40,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:40,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:40,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 21:02:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:41,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 21:02:41,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 21:02:41,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:02:41,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984156451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:02:41,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:02:41,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:02:41,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540609787] [2022-11-18 21:02:41,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:02:41,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 21:02:41,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:41,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 21:02:41,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 21:02:41,140 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 21:02:41,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:41,204 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2022-11-18 21:02:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 21:02:41,207 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-11-18 21:02:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:41,217 INFO L225 Difference]: With dead ends: 67 [2022-11-18 21:02:41,217 INFO L226 Difference]: Without dead ends: 31 [2022-11-18 21:02:41,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 21:02:41,234 INFO L413 NwaCegarLoop]: 44 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, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:41,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:02:41,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-18 21:02:41,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-18 21:02:41,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 21:02:41,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-11-18 21:02:41,293 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2022-11-18 21:02:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:41,293 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-11-18 21:02:41,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 21:02:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-11-18 21:02:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 21:02:41,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:41,296 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:41,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 21:02:41,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-18 21:02:41,502 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:41,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:41,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2022-11-18 21:02:41,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:41,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345811679] [2022-11-18 21:02:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:41,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:41,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:02:41,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168219267] [2022-11-18 21:02:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:41,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:41,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:41,542 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:41,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 21:02:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:41,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 21:02:41,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 21:02:41,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:02:41,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:41,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345811679] [2022-11-18 21:02:41,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:02:41,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168219267] [2022-11-18 21:02:41,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168219267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:02:41,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:02:41,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 21:02:41,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150091542] [2022-11-18 21:02:41,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:02:41,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:02:41,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:41,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:02:41,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:02:41,776 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 21:02:41,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:41,946 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-11-18 21:02:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:02:41,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-11-18 21:02:41,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:41,949 INFO L225 Difference]: With dead ends: 50 [2022-11-18 21:02:41,949 INFO L226 Difference]: Without dead ends: 43 [2022-11-18 21:02:41,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 21:02:41,951 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:41,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 113 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:02:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-18 21:02:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-11-18 21:02:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 21:02:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-11-18 21:02:41,964 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2022-11-18 21:02:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:41,965 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-11-18 21:02:41,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 21:02:41,965 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-11-18 21:02:41,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 21:02:41,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:41,967 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:41,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 21:02:42,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:42,173 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:42,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:42,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2022-11-18 21:02:42,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:42,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552907439] [2022-11-18 21:02:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:42,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:42,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:02:42,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550508376] [2022-11-18 21:02:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:42,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:42,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:42,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:42,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 21:02:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:42,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:02:42,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 21:02:42,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:02:42,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:42,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552907439] [2022-11-18 21:02:42,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:02:42,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550508376] [2022-11-18 21:02:42,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550508376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:02:42,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:02:42,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 21:02:42,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726507617] [2022-11-18 21:02:42,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:02:42,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 21:02:42,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:42,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 21:02:42,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-18 21:02:42,547 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 21:02:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:42,708 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-11-18 21:02:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:02:42,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-18 21:02:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:42,710 INFO L225 Difference]: With dead ends: 49 [2022-11-18 21:02:42,711 INFO L226 Difference]: Without dead ends: 47 [2022-11-18 21:02:42,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:02:42,712 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:42,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 161 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:02:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-18 21:02:42,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-11-18 21:02:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 21:02:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-11-18 21:02:42,725 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2022-11-18 21:02:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:42,726 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-11-18 21:02:42,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 21:02:42,739 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-11-18 21:02:42,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-18 21:02:42,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:42,741 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:42,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 21:02:42,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:42,942 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:42,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:42,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2022-11-18 21:02:42,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:42,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222236244] [2022-11-18 21:02:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:42,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:42,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:02:42,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328366993] [2022-11-18 21:02:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:42,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:42,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:42,994 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:42,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 21:02:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:43,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 21:02:43,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 21:02:43,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 21:02:43,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:43,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222236244] [2022-11-18 21:02:43,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:02:43,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328366993] [2022-11-18 21:02:43,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328366993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:02:43,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:02:43,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-18 21:02:43,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596966201] [2022-11-18 21:02:43,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:02:43,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 21:02:43,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:43,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 21:02:43,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-18 21:02:43,313 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 21:02:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:43,578 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2022-11-18 21:02:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:02:43,579 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-11-18 21:02:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:43,588 INFO L225 Difference]: With dead ends: 99 [2022-11-18 21:02:43,589 INFO L226 Difference]: Without dead ends: 92 [2022-11-18 21:02:43,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:02:43,594 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:43,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 242 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:02:43,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-18 21:02:43,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2022-11-18 21:02:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-18 21:02:43,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-11-18 21:02:43,635 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2022-11-18 21:02:43,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:43,636 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-11-18 21:02:43,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 21:02:43,636 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-11-18 21:02:43,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 21:02:43,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:43,638 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:43,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 21:02:43,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-18 21:02:43,843 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:43,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:43,844 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2022-11-18 21:02:43,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:43,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896150944] [2022-11-18 21:02:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:43,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:43,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:02:43,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158412593] [2022-11-18 21:02:43,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:43,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:43,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:43,864 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:43,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 21:02:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:43,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:02:43,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 21:02:44,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:44,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:44,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896150944] [2022-11-18 21:02:44,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:02:44,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158412593] [2022-11-18 21:02:44,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158412593] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:02:44,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:02:44,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-11-18 21:02:44,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740576644] [2022-11-18 21:02:44,249 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:02:44,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:02:44,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:44,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:02:44,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:02:44,253 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 21:02:44,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:44,406 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2022-11-18 21:02:44,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 21:02:44,407 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-11-18 21:02:44,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:44,410 INFO L225 Difference]: With dead ends: 75 [2022-11-18 21:02:44,411 INFO L226 Difference]: Without dead ends: 73 [2022-11-18 21:02:44,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:02:44,412 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:44,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 145 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:02:44,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-18 21:02:44,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-11-18 21:02:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-18 21:02:44,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2022-11-18 21:02:44,437 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2022-11-18 21:02:44,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:44,438 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2022-11-18 21:02:44,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 21:02:44,438 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2022-11-18 21:02:44,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 21:02:44,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:44,440 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:44,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-18 21:02:44,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:44,641 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:44,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:44,641 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2022-11-18 21:02:44,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:44,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001590264] [2022-11-18 21:02:44,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:44,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:44,657 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:02:44,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913698276] [2022-11-18 21:02:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:44,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:44,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:44,673 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:44,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 21:02:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:44,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 21:02:44,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 21:02:44,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 21:02:45,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:45,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001590264] [2022-11-18 21:02:45,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:02:45,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913698276] [2022-11-18 21:02:45,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913698276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:02:45,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:02:45,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2022-11-18 21:02:45,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570208862] [2022-11-18 21:02:45,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:02:45,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 21:02:45,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:45,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 21:02:45,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-18 21:02:45,198 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 21:02:45,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:45,425 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2022-11-18 21:02:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 21:02:45,426 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 38 [2022-11-18 21:02:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:45,428 INFO L225 Difference]: With dead ends: 107 [2022-11-18 21:02:45,429 INFO L226 Difference]: Without dead ends: 105 [2022-11-18 21:02:45,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-18 21:02:45,431 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 54 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:45,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 261 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 183 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-11-18 21:02:45,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-18 21:02:45,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2022-11-18 21:02:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-18 21:02:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2022-11-18 21:02:45,478 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2022-11-18 21:02:45,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:45,479 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2022-11-18 21:02:45,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 21:02:45,479 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2022-11-18 21:02:45,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 21:02:45,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:45,487 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:45,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 21:02:45,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:45,692 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:45,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2022-11-18 21:02:45,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:45,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586871040] [2022-11-18 21:02:45,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:45,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:45,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:02:45,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971834920] [2022-11-18 21:02:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:45,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:45,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:45,725 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:45,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 21:02:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:45,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 21:02:45,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 21:02:46,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 21:02:46,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:46,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586871040] [2022-11-18 21:02:46,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:02:46,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971834920] [2022-11-18 21:02:46,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971834920] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:02:46,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:02:46,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2022-11-18 21:02:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781511168] [2022-11-18 21:02:46,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:02:46,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:02:46,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:46,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:02:46,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:02:46,257 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 21:02:46,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:46,358 INFO L93 Difference]: Finished difference Result 147 states and 209 transitions. [2022-11-18 21:02:46,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:02:46,359 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-11-18 21:02:46,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:46,361 INFO L225 Difference]: With dead ends: 147 [2022-11-18 21:02:46,362 INFO L226 Difference]: Without dead ends: 145 [2022-11-18 21:02:46,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-18 21:02:46,367 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:46,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:02:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-18 21:02:46,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2022-11-18 21:02:46,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-18 21:02:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 201 transitions. [2022-11-18 21:02:46,424 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 201 transitions. Word has length 43 [2022-11-18 21:02:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:46,426 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 201 transitions. [2022-11-18 21:02:46,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 21:02:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 201 transitions. [2022-11-18 21:02:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 21:02:46,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:46,433 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-18 21:02:46,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 21:02:46,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 21:02:46,638 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:46,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2022-11-18 21:02:46,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:46,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748551243] [2022-11-18 21:02:46,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:46,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:46,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:02:46,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563939053] [2022-11-18 21:02:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:46,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:46,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:46,655 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:46,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 21:02:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:46,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 21:02:46,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 21:02:47,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 21:02:47,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:47,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748551243] [2022-11-18 21:02:47,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:02:47,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563939053] [2022-11-18 21:02:47,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563939053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:02:47,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:02:47,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2022-11-18 21:02:47,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223213734] [2022-11-18 21:02:47,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:02:47,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 21:02:47,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:47,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 21:02:47,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-11-18 21:02:47,465 INFO L87 Difference]: Start difference. First operand 139 states and 201 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-18 21:02:48,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:48,661 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2022-11-18 21:02:48,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 21:02:48,662 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2022-11-18 21:02:48,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:48,672 INFO L225 Difference]: With dead ends: 214 [2022-11-18 21:02:48,672 INFO L226 Difference]: Without dead ends: 212 [2022-11-18 21:02:48,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 21:02:48,674 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 118 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:48,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 288 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 743 Invalid, 0 Unknown, 113 Unchecked, 0.6s Time] [2022-11-18 21:02:48,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-18 21:02:48,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 166. [2022-11-18 21:02:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 106 states have (on average 1.2641509433962264) internal successors, (134), 110 states have internal predecessors, (134), 51 states have call successors, (51), 8 states have call predecessors, (51), 8 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-18 21:02:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 235 transitions. [2022-11-18 21:02:48,745 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 235 transitions. Word has length 43 [2022-11-18 21:02:48,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:48,746 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 235 transitions. [2022-11-18 21:02:48,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-18 21:02:48,746 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 235 transitions. [2022-11-18 21:02:48,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 21:02:48,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:48,750 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:48,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 21:02:48,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:48,956 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:48,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:48,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2022-11-18 21:02:48,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:48,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452346452] [2022-11-18 21:02:48,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:48,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:48,976 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:02:48,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633857350] [2022-11-18 21:02:48,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:02:48,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:48,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:48,979 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:48,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 21:02:49,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:02:49,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:02:49,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 21:02:49,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 21:02:49,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:02:49,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:49,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452346452] [2022-11-18 21:02:49,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:02:49,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633857350] [2022-11-18 21:02:49,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633857350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:02:49,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:02:49,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:02:49,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583130869] [2022-11-18 21:02:49,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:02:49,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:02:49,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:49,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:02:49,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:02:49,069 INFO L87 Difference]: Start difference. First operand 166 states and 235 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), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 21:02:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:49,212 INFO L93 Difference]: Finished difference Result 212 states and 295 transitions. [2022-11-18 21:02:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:02:49,213 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), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-11-18 21:02:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:49,214 INFO L225 Difference]: With dead ends: 212 [2022-11-18 21:02:49,214 INFO L226 Difference]: Without dead ends: 136 [2022-11-18 21:02:49,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:02:49,216 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:49,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 139 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:02:49,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-18 21:02:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2022-11-18 21:02:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 74 states have internal predecessors, (84), 33 states have call successors, (33), 8 states have call predecessors, (33), 8 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-18 21:02:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 149 transitions. [2022-11-18 21:02:49,253 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 149 transitions. Word has length 43 [2022-11-18 21:02:49,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:49,254 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 149 transitions. [2022-11-18 21:02:49,254 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), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 21:02:49,254 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 149 transitions. [2022-11-18 21:02:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 21:02:49,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:49,255 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:49,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 21:02:49,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 21:02:49,460 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:49,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2022-11-18 21:02:49,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:49,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528791032] [2022-11-18 21:02:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:49,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:49,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:02:49,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345378822] [2022-11-18 21:02:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:49,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:49,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:49,474 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:49,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 21:02:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:49,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 21:02:49,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-18 21:02:49,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 21:02:49,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:49,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528791032] [2022-11-18 21:02:49,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:02:49,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345378822] [2022-11-18 21:02:49,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345378822] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:02:49,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:02:49,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2022-11-18 21:02:49,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585106654] [2022-11-18 21:02:49,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:02:49,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:02:49,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:49,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:02:49,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-18 21:02:49,784 INFO L87 Difference]: Start difference. First operand 113 states and 149 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 21:02:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:49,890 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2022-11-18 21:02:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:02:49,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2022-11-18 21:02:49,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:49,893 INFO L225 Difference]: With dead ends: 119 [2022-11-18 21:02:49,893 INFO L226 Difference]: Without dead ends: 117 [2022-11-18 21:02:49,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:02:49,895 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:49,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:02:49,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-18 21:02:49,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-18 21:02:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 77 states have internal predecessors, (87), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-18 21:02:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 152 transitions. [2022-11-18 21:02:49,943 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 152 transitions. Word has length 48 [2022-11-18 21:02:49,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:49,944 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 152 transitions. [2022-11-18 21:02:49,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 21:02:49,944 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 152 transitions. [2022-11-18 21:02:49,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-18 21:02:49,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:49,945 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:49,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 21:02:50,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 21:02:50,151 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:02:50,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:50,151 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2022-11-18 21:02:50,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:50,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869292254] [2022-11-18 21:02:50,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:50,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:50,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:02:50,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481179115] [2022-11-18 21:02:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:50,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:50,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:50,166 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:50,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 21:02:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:50,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-18 21:02:50,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 21:02:51,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 21:02:53,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:53,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869292254] [2022-11-18 21:02:53,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:02:53,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481179115] [2022-11-18 21:02:53,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481179115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:02:53,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:02:53,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2022-11-18 21:02:53,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160871699] [2022-11-18 21:02:53,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:02:53,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 21:02:53,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:53,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 21:02:53,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-11-18 21:02:53,836 INFO L87 Difference]: Start difference. First operand 117 states and 152 transitions. Second operand has 27 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-18 21:03:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:15,843 INFO L93 Difference]: Finished difference Result 336 states and 470 transitions. [2022-11-18 21:03:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-18 21:03:15,843 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 60 [2022-11-18 21:03:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:15,846 INFO L225 Difference]: With dead ends: 336 [2022-11-18 21:03:15,846 INFO L226 Difference]: Without dead ends: 248 [2022-11-18 21:03:15,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=448, Invalid=2204, Unknown=0, NotChecked=0, Total=2652 [2022-11-18 21:03:15,848 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 195 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:15,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 274 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-11-18 21:03:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-18 21:03:15,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 195. [2022-11-18 21:03:15,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 126 states have (on average 1.1904761904761905) internal successors, (150), 128 states have internal predecessors, (150), 55 states have call successors, (55), 13 states have call predecessors, (55), 13 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-18 21:03:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 259 transitions. [2022-11-18 21:03:15,953 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 259 transitions. Word has length 60 [2022-11-18 21:03:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:15,954 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 259 transitions. [2022-11-18 21:03:15,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-18 21:03:15,954 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 259 transitions. [2022-11-18 21:03:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 21:03:15,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:15,956 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:15,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:16,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:16,161 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:03:16,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:16,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2022-11-18 21:03:16,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:16,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098993148] [2022-11-18 21:03:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:16,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:16,189 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:03:16,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078168059] [2022-11-18 21:03:16,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:16,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:16,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:16,198 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:16,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 21:03:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:16,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 21:03:16,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-18 21:03:17,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-18 21:03:17,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:17,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098993148] [2022-11-18 21:03:17,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:03:17,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078168059] [2022-11-18 21:03:17,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078168059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:17,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:17,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2022-11-18 21:03:17,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163725023] [2022-11-18 21:03:17,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:17,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 21:03:17,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:17,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 21:03:17,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-11-18 21:03:17,544 INFO L87 Difference]: Start difference. First operand 195 states and 259 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-18 21:03:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:47,629 INFO L93 Difference]: Finished difference Result 322 states and 453 transitions. [2022-11-18 21:03:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 21:03:47,629 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 68 [2022-11-18 21:03:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:47,632 INFO L225 Difference]: With dead ends: 322 [2022-11-18 21:03:47,632 INFO L226 Difference]: Without dead ends: 320 [2022-11-18 21:03:47,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 21:03:47,634 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 190 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:47,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 332 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2022-11-18 21:03:47,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-18 21:03:47,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 203. [2022-11-18 21:03:47,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 134 states have internal predecessors, (156), 55 states have call successors, (55), 15 states have call predecessors, (55), 15 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-18 21:03:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 265 transitions. [2022-11-18 21:03:47,731 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 265 transitions. Word has length 68 [2022-11-18 21:03:47,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:47,731 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 265 transitions. [2022-11-18 21:03:47,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-18 21:03:47,732 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 265 transitions. [2022-11-18 21:03:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-18 21:03:47,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:47,733 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:47,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:47,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:47,938 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:03:47,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:47,939 INFO L85 PathProgramCache]: Analyzing trace with hash 798002477, now seen corresponding path program 2 times [2022-11-18 21:03:47,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:47,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867504442] [2022-11-18 21:03:47,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:47,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:47,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:03:47,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46251507] [2022-11-18 21:03:47,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:03:47,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:47,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:47,954 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:47,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 21:03:48,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:03:48,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:48,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 21:03:48,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-18 21:03:48,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:03:48,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:03:48,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867504442] [2022-11-18 21:03:48,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:03:48,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46251507] [2022-11-18 21:03:48,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46251507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:03:48,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:03:48,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:03:48,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827641356] [2022-11-18 21:03:48,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:03:48,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:03:48,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:48,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:03:48,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:03:48,065 INFO L87 Difference]: Start difference. First operand 203 states and 265 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-18 21:03:48,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:48,222 INFO L93 Difference]: Finished difference Result 363 states and 487 transitions. [2022-11-18 21:03:48,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:03:48,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2022-11-18 21:03:48,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:48,225 INFO L225 Difference]: With dead ends: 363 [2022-11-18 21:03:48,225 INFO L226 Difference]: Without dead ends: 241 [2022-11-18 21:03:48,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:03:48,226 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 4 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:48,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 97 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:03:48,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-18 21:03:48,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 227. [2022-11-18 21:03:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 140 states have (on average 1.1785714285714286) internal successors, (165), 142 states have internal predecessors, (165), 71 states have call successors, (71), 15 states have call predecessors, (71), 15 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-18 21:03:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 306 transitions. [2022-11-18 21:03:48,355 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 306 transitions. Word has length 73 [2022-11-18 21:03:48,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:48,356 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 306 transitions. [2022-11-18 21:03:48,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-18 21:03:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 306 transitions. [2022-11-18 21:03:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-18 21:03:48,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:48,357 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:48,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:48,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:48,568 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:03:48,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:48,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 3 times [2022-11-18 21:03:48,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:03:48,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718061694] [2022-11-18 21:03:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:48,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:03:48,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:03:48,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779382367] [2022-11-18 21:03:48,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:03:48,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:03:48,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:03:48,580 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:03:48,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 21:03:48,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 21:03:48,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:48,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-18 21:03:48,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-18 21:03:49,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:07,951 WARN L859 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18|))) (or (= (mod .cse0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36|) 0) (= .cse0 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1)))) is different from true [2022-11-18 21:04:52,709 WARN L233 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 21:05:00,737 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18|))) (or (= (mod .cse0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36|) 0) (= .cse0 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-11-18 21:05:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 24 proven. 22 refuted. 1 times theorem prover too weak. 48 trivial. 1 not checked. [2022-11-18 21:05:15,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:15,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718061694] [2022-11-18 21:05:15,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:05:15,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779382367] [2022-11-18 21:05:15,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779382367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:15,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:05:15,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2022-11-18 21:05:15,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506999085] [2022-11-18 21:05:15,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:15,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 21:05:15,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:15,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 21:05:15,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=626, Unknown=14, NotChecked=106, Total=870 [2022-11-18 21:05:15,884 INFO L87 Difference]: Start difference. First operand 227 states and 306 transitions. Second operand has 30 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-18 21:05:23,400 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (= |c___VERIFIER_assert_#in~cond| 1))) (and (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18|))) (or (= (mod .cse0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36|) 0) (= .cse0 0)))) (not .cse1)) .cse1)) is different from false [2022-11-18 21:05:25,402 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (= |c___VERIFIER_assert_#in~cond| 1))) (and (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18|))) (or (= (mod .cse0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36|) 0) (= .cse0 0)))) (not .cse1)) .cse1)) is different from true [2022-11-18 21:05:29,482 WARN L837 $PredicateComparison]: unable to prove that (and (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond) (= c___VERIFIER_assert_~cond 1) (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18|))) (or (= (mod .cse0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36|) 0) (= .cse0 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1)))) (= c___VERIFIER_assert_~cond 0))) is different from false [2022-11-18 21:05:31,483 WARN L859 $PredicateComparison]: unable to prove that (and (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond) (= c___VERIFIER_assert_~cond 1) (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18|))) (or (= (mod .cse0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36|) 0) (= .cse0 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1)))) (= c___VERIFIER_assert_~cond 0))) is different from true [2022-11-18 21:05:33,558 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (and (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) .cse0) |c_ULTIMATE.start_main_~b~0#1|) (or (= (+ (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~v~0#1|)) (and (or (not (= (mod (+ (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~y~0#1|) 0)) (= |c_ULTIMATE.start_main_~y~0#1| 0)) (not (= .cse0 |c_ULTIMATE.start_main_~b~0#1|))) (<= (* 2 |c_ULTIMATE.start_main_~v~0#1|) |c_ULTIMATE.start_main_~c~0#1|)))) is different from false [2022-11-18 21:05:44,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:05:57,943 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|))) (let ((.cse6 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse8 (+ .cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~b~0#1|)) (.cse1 (= |c_ULTIMATE.start_main_~y~0#1| 0)) (.cse7 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse4 (* 2 |c_ULTIMATE.start_main_~b~0#1|)) (.cse5 (and (or (not (= (mod (+ (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~y~0#1|) 0)) .cse1) (not (= .cse7 |c_ULTIMATE.start_main_~b~0#1|)))) (.cse3 (= (+ |c_ULTIMATE.start_main_~c~0#1| .cse6 .cse7 .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) .cse8))) (and (= (+ 1 |c_ULTIMATE.start_main_~q~0#1|) 0) (= |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~a~0#1|) (= |c_ULTIMATE.start_main_~p~0#1| 1) (or (<= (* |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~b~0#1|) (and (or (not (= 0 (mod (+ |c_ULTIMATE.start_main_~c~0#1| (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) .cse0) |c_ULTIMATE.start_main_~y~0#1|))) .cse1) (not (= .cse2 (+ |c_ULTIMATE.start_main_~c~0#1| .cse0)))) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|) .cse3) (or (<= .cse4 |c_ULTIMATE.start_main_~a~0#1|) .cse5 (= (+ .cse6 .cse7 |c_ULTIMATE.start_main_~a~0#1|) .cse8)) (= |c_ULTIMATE.start_main_~s~0#1| 1) (not (<= |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1|)) (not (<= |c_ULTIMATE.start_main_~y~0#1| .cse4)) (or (<= .cse4 |c_ULTIMATE.start_main_~c~0#1|) .cse5 .cse3) (= |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)))))) is different from false [2022-11-18 21:06:44,774 WARN L233 SmtUtils]: Spent 42.06s on a formula simplification. DAG size of input: 22 DAG size of output: 17 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 21:07:06,218 WARN L859 $PredicateComparison]: unable to prove that (and (not (= c___VERIFIER_assert_~cond 0)) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond) (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_18|))) (or (= (mod .cse0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_36|) 0) (= .cse0 0)))) (not (= |c___VERIFIER_assert_#in~cond| 1)))) is different from true [2022-11-18 21:07:08,250 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse1 (= |c_ULTIMATE.start_main_~y~0#1| 0)) (.cse8 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse7 (* 2 |c_ULTIMATE.start_main_~b~0#1|)) (.cse6 (and (or (not (= (mod (+ (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~y~0#1|) 0)) .cse1) (not (= .cse8 |c_ULTIMATE.start_main_~b~0#1|)))) (.cse3 (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) .cse8 .cse0 .cse4) (+ .cse2 .cse5 |c_ULTIMATE.start_main_~b~0#1|)))) (and (= (+ 1 |c_ULTIMATE.start_main_~q~0#1|) 0) (= |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~a~0#1|) (= |c_ULTIMATE.start_main_~p~0#1| 1) (or (<= (* |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~b~0#1|) (and (or (not (= 0 (mod (+ |c_ULTIMATE.start_main_~c~0#1| (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) .cse0) |c_ULTIMATE.start_main_~y~0#1|))) .cse1) (not (= .cse2 (+ |c_ULTIMATE.start_main_~c~0#1| .cse0)))) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|) .cse3) (= |c_ULTIMATE.start_main_~s~0#1| 1) (not (<= |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1|)) (or (= (+ (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~s~0#1|) .cse0 .cse4) (+ .cse2 .cse5 |c_ULTIMATE.start_main_~v~0#1|)) .cse6 (<= (* 2 |c_ULTIMATE.start_main_~v~0#1|) |c_ULTIMATE.start_main_~c~0#1|)) (not (<= |c_ULTIMATE.start_main_~y~0#1| .cse7)) (or (<= .cse7 |c_ULTIMATE.start_main_~c~0#1|) .cse6 .cse3) (= |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|))))) is different from false [2022-11-18 21:07:17,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:07:23,576 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (= |c_ULTIMATE.start_main_~y~0#1| 0)) (.cse8 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse4 (* 2 |c_ULTIMATE.start_main_~b~0#1|)) (.cse3 (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) .cse8 .cse0 .cse7) (+ .cse2 .cse6 |c_ULTIMATE.start_main_~b~0#1|))) (.cse5 (and (or (not (= (mod (+ (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~b~0#1|) |c_ULTIMATE.start_main_~y~0#1|) 0)) .cse1) (not (= .cse8 |c_ULTIMATE.start_main_~b~0#1|))))) (and (or (<= (* |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~b~0#1|) (and (or (not (= 0 (mod (+ |c_ULTIMATE.start_main_~c~0#1| (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) .cse0) |c_ULTIMATE.start_main_~y~0#1|))) .cse1) (not (= .cse2 (+ |c_ULTIMATE.start_main_~c~0#1| .cse0)))) .cse3) (= (+ 1 |c_ULTIMATE.start_main_~q~0#1|) 0) (= |c_ULTIMATE.start_main_~s~0#1| 1) (not (<= |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1|)) (not (<= |c_ULTIMATE.start_main_~y~0#1| .cse4)) (= |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (or (<= .cse4 |c_ULTIMATE.start_main_~c~0#1|) .cse5 .cse3) (or .cse5 (= (+ .cse2 .cse6) (+ |c_ULTIMATE.start_main_~c~0#1| .cse0 .cse7)))))) is different from false [2022-11-18 21:07:55,769 WARN L233 SmtUtils]: Spent 21.88s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 21:07:57,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:07:59,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:08:01,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:08:32,222 WARN L233 SmtUtils]: Spent 22.28s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 21:09:08,471 WARN L233 SmtUtils]: Spent 23.69s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 21:09:58,372 WARN L233 SmtUtils]: Spent 35.96s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 21:10:00,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:11:04,334 WARN L233 SmtUtils]: Spent 52.98s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 21:11:34,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:11:36,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:11:38,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:11:49,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:11:57,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:57,577 INFO L93 Difference]: Finished difference Result 346 states and 455 transitions. [2022-11-18 21:11:57,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-18 21:11:57,578 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 73 [2022-11-18 21:11:57,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:57,581 INFO L225 Difference]: With dead ends: 346 [2022-11-18 21:11:57,581 INFO L226 Difference]: Without dead ends: 344 [2022-11-18 21:11:57,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 409.8s TimeCoverageRelationStatistics Valid=534, Invalid=2399, Unknown=73, NotChecked=1026, Total=4032 [2022-11-18 21:11:57,583 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 128 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 62 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 40.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:57,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 457 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1054 Invalid, 10 Unknown, 311 Unchecked, 40.5s Time] [2022-11-18 21:11:57,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-18 21:11:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 323. [2022-11-18 21:11:57,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 205 states have (on average 1.1512195121951219) internal successors, (236), 210 states have internal predecessors, (236), 95 states have call successors, (95), 23 states have call predecessors, (95), 22 states have return successors, (94), 89 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-18 21:11:57,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 425 transitions. [2022-11-18 21:11:57,816 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 425 transitions. Word has length 73 [2022-11-18 21:11:57,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:57,817 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 425 transitions. [2022-11-18 21:11:57,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-18 21:11:57,817 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 425 transitions. [2022-11-18 21:11:57,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-18 21:11:57,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:57,819 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:57,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:58,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 21:11:58,024 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:58,024 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2022-11-18 21:11:58,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:58,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834881283] [2022-11-18 21:11:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:58,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:58,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:11:58,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592244040] [2022-11-18 21:11:58,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:58,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:58,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:58,053 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:58,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 21:11:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:58,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-18 21:11:58,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 22 proven. 22 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-18 21:11:59,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-18 21:12:02,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:12:02,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834881283] [2022-11-18 21:12:02,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:12:02,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592244040] [2022-11-18 21:12:02,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592244040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:12:02,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:12:02,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2022-11-18 21:12:02,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410209801] [2022-11-18 21:12:02,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:12:02,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 21:12:02,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:12:02,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 21:12:02,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-11-18 21:12:02,498 INFO L87 Difference]: Start difference. First operand 323 states and 425 transitions. Second operand has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-18 21:12:26,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:12:40,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:12:51,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:12:56,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:13:07,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:13:18,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:13:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:26,955 INFO L93 Difference]: Finished difference Result 520 states and 706 transitions. [2022-11-18 21:13:26,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-18 21:13:26,956 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 87 [2022-11-18 21:13:26,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:26,959 INFO L225 Difference]: With dead ends: 520 [2022-11-18 21:13:26,959 INFO L226 Difference]: Without dead ends: 516 [2022-11-18 21:13:26,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 61.6s TimeCoverageRelationStatistics Valid=1610, Invalid=7510, Unknown=0, NotChecked=0, Total=9120 [2022-11-18 21:13:26,962 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 303 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 637 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 3105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:26,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 647 Invalid, 3105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 2464 Invalid, 4 Unknown, 0 Unchecked, 25.4s Time] [2022-11-18 21:13:26,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-11-18 21:13:27,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 454. [2022-11-18 21:13:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 275 states have (on average 1.1781818181818182) internal successors, (324), 278 states have internal predecessors, (324), 147 states have call successors, (147), 32 states have call predecessors, (147), 31 states have return successors, (146), 143 states have call predecessors, (146), 146 states have call successors, (146) [2022-11-18 21:13:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 617 transitions. [2022-11-18 21:13:27,309 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 617 transitions. Word has length 87 [2022-11-18 21:13:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:27,310 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 617 transitions. [2022-11-18 21:13:27,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-18 21:13:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 617 transitions. [2022-11-18 21:13:27,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-18 21:13:27,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:27,312 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:27,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-18 21:13:27,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 21:13:27,517 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:13:27,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash -275231594, now seen corresponding path program 1 times [2022-11-18 21:13:27,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:13:27,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163499637] [2022-11-18 21:13:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:27,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:13:27,534 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:13:27,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569409743] [2022-11-18 21:13:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:27,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:13:27,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:13:27,538 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:13:27,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 21:13:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:13:27,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 21:13:27,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-11-18 21:13:27,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:13:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-18 21:13:28,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:13:28,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163499637] [2022-11-18 21:13:28,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:13:28,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569409743] [2022-11-18 21:13:28,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569409743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:13:28,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:13:28,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2022-11-18 21:13:28,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368193129] [2022-11-18 21:13:28,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:13:28,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 21:13:28,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:13:28,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 21:13:28,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-18 21:13:28,568 INFO L87 Difference]: Start difference. First operand 454 states and 617 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-18 21:13:32,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:13:32,166 INFO L93 Difference]: Finished difference Result 884 states and 1331 transitions. [2022-11-18 21:13:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 21:13:32,167 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 90 [2022-11-18 21:13:32,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:13:32,171 INFO L225 Difference]: With dead ends: 884 [2022-11-18 21:13:32,172 INFO L226 Difference]: Without dead ends: 882 [2022-11-18 21:13:32,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 21:13:32,173 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 243 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:13:32,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 475 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-18 21:13:32,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-11-18 21:13:32,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 816. [2022-11-18 21:13:32,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 421 states have (on average 1.2707838479809976) internal successors, (535), 423 states have internal predecessors, (535), 361 states have call successors, (361), 34 states have call predecessors, (361), 33 states have return successors, (360), 358 states have call predecessors, (360), 360 states have call successors, (360) [2022-11-18 21:13:32,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1256 transitions. [2022-11-18 21:13:32,960 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1256 transitions. Word has length 90 [2022-11-18 21:13:32,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:13:32,960 INFO L495 AbstractCegarLoop]: Abstraction has 816 states and 1256 transitions. [2022-11-18 21:13:32,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-18 21:13:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1256 transitions. [2022-11-18 21:13:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-18 21:13:32,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:13:32,962 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:13:32,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-18 21:13:33,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 21:13:33,167 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:13:33,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:13:33,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1599365144, now seen corresponding path program 1 times [2022-11-18 21:13:33,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:13:33,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129376518] [2022-11-18 21:13:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:33,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:13:33,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:13:33,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391276449] [2022-11-18 21:13:33,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:13:33,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:13:33,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:13:33,195 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:13:33,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 21:13:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:13:33,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-18 21:13:33,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:13:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-11-18 21:13:34,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:13:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-18 21:13:35,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:13:35,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129376518] [2022-11-18 21:13:35,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:13:35,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391276449] [2022-11-18 21:13:35,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391276449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:13:35,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:13:35,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2022-11-18 21:13:35,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246830641] [2022-11-18 21:13:35,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:13:35,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 21:13:35,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:13:35,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 21:13:35,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-11-18 21:13:35,271 INFO L87 Difference]: Start difference. First operand 816 states and 1256 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-18 21:13:50,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:14:30,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:14:30,497 INFO L93 Difference]: Finished difference Result 1182 states and 1846 transitions. [2022-11-18 21:14:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-18 21:14:30,498 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 90 [2022-11-18 21:14:30,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:14:30,505 INFO L225 Difference]: With dead ends: 1182 [2022-11-18 21:14:30,505 INFO L226 Difference]: Without dead ends: 1180 [2022-11-18 21:14:30,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=815, Invalid=3217, Unknown=0, NotChecked=0, Total=4032 [2022-11-18 21:14:30,508 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 235 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 438 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:14:30,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 471 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 1416 Invalid, 1 Unknown, 0 Unchecked, 23.4s Time] [2022-11-18 21:14:30,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-11-18 21:14:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1049. [2022-11-18 21:14:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 534 states have (on average 1.2865168539325842) internal successors, (687), 536 states have internal predecessors, (687), 477 states have call successors, (477), 38 states have call predecessors, (477), 37 states have return successors, (476), 474 states have call predecessors, (476), 476 states have call successors, (476) [2022-11-18 21:14:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1640 transitions. [2022-11-18 21:14:31,994 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1640 transitions. Word has length 90 [2022-11-18 21:14:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:14:31,994 INFO L495 AbstractCegarLoop]: Abstraction has 1049 states and 1640 transitions. [2022-11-18 21:14:31,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-18 21:14:31,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1640 transitions. [2022-11-18 21:14:31,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-18 21:14:31,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:14:31,997 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:14:32,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 21:14:32,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 21:14:32,203 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:14:32,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:14:32,204 INFO L85 PathProgramCache]: Analyzing trace with hash -577787487, now seen corresponding path program 4 times [2022-11-18 21:14:32,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:14:32,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239973014] [2022-11-18 21:14:32,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:14:32,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:14:32,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:14:32,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030514121] [2022-11-18 21:14:32,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:14:32,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:14:32,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:14:32,216 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:14:32,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 21:14:32,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:14:32,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:14:32,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-18 21:14:32,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:14:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 38 proven. 53 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-18 21:14:34,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:14:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 45 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-18 21:14:37,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:14:37,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239973014] [2022-11-18 21:14:37,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:14:37,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030514121] [2022-11-18 21:14:37,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030514121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:14:37,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:14:37,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2022-11-18 21:14:37,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062256971] [2022-11-18 21:14:37,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:14:37,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 21:14:37,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:14:37,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 21:14:37,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 21:14:37,866 INFO L87 Difference]: Start difference. First operand 1049 states and 1640 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 31 states have internal predecessors, (74), 10 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-11-18 21:14:47,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:15:26,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:15:26,176 INFO L93 Difference]: Finished difference Result 1227 states and 1891 transitions. [2022-11-18 21:15:26,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 21:15:26,177 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 31 states have internal predecessors, (74), 10 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) Word has length 98 [2022-11-18 21:15:26,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:15:26,184 INFO L225 Difference]: With dead ends: 1227 [2022-11-18 21:15:26,184 INFO L226 Difference]: Without dead ends: 1225 [2022-11-18 21:15:26,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=731, Invalid=3175, Unknown=0, NotChecked=0, Total=3906 [2022-11-18 21:15:26,186 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 267 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 431 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 2129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:15:26,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 346 Invalid, 2129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 1697 Invalid, 1 Unknown, 0 Unchecked, 24.7s Time] [2022-11-18 21:15:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-11-18 21:15:27,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1096. [2022-11-18 21:15:27,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 571 states have (on average 1.2714535901926445) internal successors, (726), 576 states have internal predecessors, (726), 481 states have call successors, (481), 43 states have call predecessors, (481), 43 states have return successors, (480), 476 states have call predecessors, (480), 480 states have call successors, (480) [2022-11-18 21:15:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1687 transitions. [2022-11-18 21:15:27,507 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1687 transitions. Word has length 98 [2022-11-18 21:15:27,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:15:27,508 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1687 transitions. [2022-11-18 21:15:27,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 31 states have internal predecessors, (74), 10 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-11-18 21:15:27,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1687 transitions. [2022-11-18 21:15:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-18 21:15:27,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:15:27,511 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:15:27,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 21:15:27,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 21:15:27,716 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:15:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:15:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2024025072, now seen corresponding path program 2 times [2022-11-18 21:15:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:15:27,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592950762] [2022-11-18 21:15:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:15:27,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:15:27,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:15:27,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541538439] [2022-11-18 21:15:27,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:15:27,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:15:27,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:15:27,736 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:15:27,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 21:15:27,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:15:27,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:15:27,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-18 21:15:27,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:15:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-11-18 21:15:28,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:15:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-18 21:15:31,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:15:31,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592950762] [2022-11-18 21:15:31,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:15:31,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541538439] [2022-11-18 21:15:31,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541538439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:15:31,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:15:31,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2022-11-18 21:15:31,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645657536] [2022-11-18 21:15:31,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:15:31,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 21:15:31,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:15:31,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 21:15:31,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-18 21:15:31,693 INFO L87 Difference]: Start difference. First operand 1096 states and 1687 transitions. Second operand has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2022-11-18 21:15:45,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:16:16,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:16:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:16:44,527 INFO L93 Difference]: Finished difference Result 1954 states and 3040 transitions. [2022-11-18 21:16:44,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-18 21:16:44,528 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 107 [2022-11-18 21:16:44,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:16:44,535 INFO L225 Difference]: With dead ends: 1954 [2022-11-18 21:16:44,535 INFO L226 Difference]: Without dead ends: 1403 [2022-11-18 21:16:44,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2843 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=1737, Invalid=7769, Unknown=0, NotChecked=0, Total=9506 [2022-11-18 21:16:44,541 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 349 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 2373 mSolverCounterSat, 634 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 3008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 2373 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:16:44,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 857 Invalid, 3008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 2373 Invalid, 1 Unknown, 0 Unchecked, 28.2s Time] [2022-11-18 21:16:44,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-11-18 21:16:46,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1231. [2022-11-18 21:16:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 637 states have (on average 1.2700156985871272) internal successors, (809), 642 states have internal predecessors, (809), 545 states have call successors, (545), 48 states have call predecessors, (545), 48 states have return successors, (544), 540 states have call predecessors, (544), 544 states have call successors, (544) [2022-11-18 21:16:46,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1898 transitions. [2022-11-18 21:16:46,242 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1898 transitions. Word has length 107 [2022-11-18 21:16:46,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:16:46,242 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1898 transitions. [2022-11-18 21:16:46,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2022-11-18 21:16:46,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1898 transitions. [2022-11-18 21:16:46,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 21:16:46,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:16:46,246 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:16:46,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 21:16:46,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:16:46,452 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:16:46,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:16:46,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1666306094, now seen corresponding path program 3 times [2022-11-18 21:16:46,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:16:46,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115750352] [2022-11-18 21:16:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:16:46,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:16:46,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:16:46,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770440046] [2022-11-18 21:16:46,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:16:46,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:16:46,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:16:46,465 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:16:46,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87386fbd-935d-41db-927a-6a2601f92cf6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 21:16:46,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 21:16:46,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:16:46,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-18 21:16:46,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:16:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 47 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-11-18 21:16:48,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:16:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-18 21:16:52,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:16:52,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115750352] [2022-11-18 21:16:52,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:16:52,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770440046] [2022-11-18 21:16:52,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770440046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:16:52,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:16:52,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2022-11-18 21:16:52,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292450521] [2022-11-18 21:16:52,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:16:52,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 21:16:52,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:16:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 21:16:52,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-11-18 21:16:52,851 INFO L87 Difference]: Start difference. First operand 1231 states and 1898 transitions. Second operand has 31 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-18 21:17:00,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:17:05,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:17:15,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:17:28,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:17:30,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:17:41,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:17:48,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:17:54,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:17:56,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []