./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a --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 36da946a83103a61b88f0f1db9af94484aad5eefbde5313f974f53b267bd14bf --- 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-b5237d8 [2022-11-21 16:08:00,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:08:00,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:08:00,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:08:00,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:08:00,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:08:00,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:08:00,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:08:00,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:08:00,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:08:00,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:08:00,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:08:00,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:08:00,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:08:00,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:08:00,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:08:00,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:08:00,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:08:00,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:08:00,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:08:00,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:08:00,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:08:00,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:08:00,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:08:00,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:08:00,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:08:00,265 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:08:00,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:08:00,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:08:00,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:08:00,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:08:00,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:08:00,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:08:00,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:08:00,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:08:00,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:08:00,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:08:00,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:08:00,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:08:00,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:08:00,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:08:00,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:08:00,312 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:08:00,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:08:00,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:08:00,320 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:08:00,321 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:08:00,322 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:08:00,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:08:00,323 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:08:00,323 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:08:00,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:08:00,324 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:08:00,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:08:00,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:08:00,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:08:00,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:08:00,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:08:00,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:08:00,326 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:08:00,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:08:00,326 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:08:00,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:08:00,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:08:00,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:08:00,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:08:00,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:08:00,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:08:00,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:08:00,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:08:00,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:08:00,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:08:00,329 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:08:00,329 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:08:00,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:08:00,330 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_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36da946a83103a61b88f0f1db9af94484aad5eefbde5313f974f53b267bd14bf [2022-11-21 16:08:00,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:08:00,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:08:00,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:08:00,675 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:08:00,675 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:08:00,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-11-21 16:08:03,767 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:08:04,015 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:08:04,015 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-11-21 16:08:04,022 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/data/d44070604/74c55bd6f5914c07badaba4d95dc0d66/FLAG6aecd0092 [2022-11-21 16:08:04,038 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/data/d44070604/74c55bd6f5914c07badaba4d95dc0d66 [2022-11-21 16:08:04,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:08:04,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:08:04,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:08:04,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:08:04,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:08:04,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:08:04" (1/1) ... [2022-11-21 16:08:04,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ebed7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:04, skipping insertion in model container [2022-11-21 16:08:04,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:08:04" (1/1) ... [2022-11-21 16:08:04,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:08:04,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:08:04,258 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c[524,537] [2022-11-21 16:08:04,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:08:04,299 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:08:04,318 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c[524,537] [2022-11-21 16:08:04,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:08:04,356 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:08:04,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:04 WrapperNode [2022-11-21 16:08:04,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:08:04,359 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:08:04,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:08:04,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:08:04,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:04" (1/1) ... [2022-11-21 16:08:04,375 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:04" (1/1) ... [2022-11-21 16:08:04,398 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2022-11-21 16:08:04,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:08:04,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:08:04,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:08:04,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:08:04,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:04" (1/1) ... [2022-11-21 16:08:04,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:04" (1/1) ... [2022-11-21 16:08:04,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:04" (1/1) ... [2022-11-21 16:08:04,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:04" (1/1) ... [2022-11-21 16:08:04,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:04" (1/1) ... [2022-11-21 16:08:04,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:04" (1/1) ... [2022-11-21 16:08:04,441 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:04" (1/1) ... [2022-11-21 16:08:04,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:04" (1/1) ... [2022-11-21 16:08:04,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:08:04,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:08:04,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:08:04,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:08:04,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:04" (1/1) ... [2022-11-21 16:08:04,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:08:04,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:04,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:08:04,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:08:04,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:08:04,542 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-21 16:08:04,542 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-21 16:08:04,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:08:04,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:08:04,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:08:04,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-21 16:08:04,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-21 16:08:04,619 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:08:04,622 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:08:04,830 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:08:04,836 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:08:04,836 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 16:08:04,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:08:04 BoogieIcfgContainer [2022-11-21 16:08:04,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:08:04,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:08:04,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:08:04,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:08:04,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:08:04" (1/3) ... [2022-11-21 16:08:04,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638786b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:08:04, skipping insertion in model container [2022-11-21 16:08:04,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:04" (2/3) ... [2022-11-21 16:08:04,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638786b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:08:04, skipping insertion in model container [2022-11-21 16:08:04,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:08:04" (3/3) ... [2022-11-21 16:08:04,849 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.c [2022-11-21 16:08:04,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:08:04,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:08:04,937 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:08:04,964 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;@4a16f7d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:08:04,964 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:08:04,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:08:04,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:08:04,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:04,998 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:04,999 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:08:05,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:05,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1086166160, now seen corresponding path program 1 times [2022-11-21 16:08:05,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:05,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437890130] [2022-11-21 16:08:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:05,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:05,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:08:05,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494536240] [2022-11-21 16:08:05,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:05,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:05,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:05,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:05,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:08:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:05,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-21 16:08:05,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:08:05,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:08:05,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:05,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437890130] [2022-11-21 16:08:05,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:08:05,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494536240] [2022-11-21 16:08:05,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494536240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:05,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:05,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:08:05,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747691078] [2022-11-21 16:08:05,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:05,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:08:05,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:05,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:08:05,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:08:05,414 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:08:05,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:05,439 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-11-21 16:08:05,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:08:05,442 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-11-21 16:08:05,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:05,449 INFO L225 Difference]: With dead ends: 47 [2022-11-21 16:08:05,450 INFO L226 Difference]: Without dead ends: 21 [2022-11-21 16:08:05,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:08:05,459 INFO L413 NwaCegarLoop]: 29 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, 29 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 [2022-11-21 16:08:05,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:08:05,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-21 16:08:05,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-21 16:08:05,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-21 16:08:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-21 16:08:05,505 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2022-11-21 16:08:05,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:05,506 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-21 16:08:05,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-21 16:08:05,508 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-21 16:08:05,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 16:08:05,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:05,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:05,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:05,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-21 16:08:05,718 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:08:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:05,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1345709874, now seen corresponding path program 1 times [2022-11-21 16:08:05,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:05,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489345612] [2022-11-21 16:08:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:05,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:05,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:08:05,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016160148] [2022-11-21 16:08:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:05,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:05,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:05,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:05,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:08:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:05,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 16:08:05,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:08:05,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:08:05,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:05,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489345612] [2022-11-21 16:08:05,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:08:05,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016160148] [2022-11-21 16:08:05,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016160148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:05,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:05,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:08:05,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923227029] [2022-11-21 16:08:05,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:05,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:08:05,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:05,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:08:05,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:08:05,991 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 16:08:06,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:06,016 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-11-21 16:08:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:08:06,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-21 16:08:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:06,019 INFO L225 Difference]: With dead ends: 30 [2022-11-21 16:08:06,019 INFO L226 Difference]: Without dead ends: 23 [2022-11-21 16:08:06,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:08:06,023 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:06,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:08:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-21 16:08:06,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-21 16:08:06,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-21 16:08:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-21 16:08:06,031 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2022-11-21 16:08:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:06,032 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-21 16:08:06,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 16:08:06,033 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-21 16:08:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 16:08:06,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:06,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:06,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:06,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:06,240 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:08:06,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:06,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1347497334, now seen corresponding path program 1 times [2022-11-21 16:08:06,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:06,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189446884] [2022-11-21 16:08:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:06,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:06,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:08:06,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770445622] [2022-11-21 16:08:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:06,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:06,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:06,268 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:06,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:08:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:06,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 16:08:06,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:06,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:08:06,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:06,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189446884] [2022-11-21 16:08:06,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:08:06,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770445622] [2022-11-21 16:08:06,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770445622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:06,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:06,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:08:06,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458102636] [2022-11-21 16:08:06,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:06,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:08:06,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:06,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:08:06,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:08:06,661 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 16:08:09,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-21 16:08:09,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:09,937 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-21 16:08:09,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:08:09,938 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-21 16:08:09,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:09,939 INFO L225 Difference]: With dead ends: 35 [2022-11-21 16:08:09,939 INFO L226 Difference]: Without dead ends: 33 [2022-11-21 16:08:09,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:08:09,940 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:09,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 79 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-21 16:08:09,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-21 16:08:09,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-11-21 16:08:09,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 16:08:09,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-11-21 16:08:09,952 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 19 [2022-11-21 16:08:09,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:09,953 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-11-21 16:08:09,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-21 16:08:09,954 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-11-21 16:08:09,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 16:08:09,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:09,955 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:09,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-21 16:08:10,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-21 16:08:10,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:08:10,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:10,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1636478750, now seen corresponding path program 1 times [2022-11-21 16:08:10,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:10,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940405714] [2022-11-21 16:08:10,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:10,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:10,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:08:10,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719185068] [2022-11-21 16:08:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:10,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:10,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:10,175 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:10,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:08:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:10,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 16:08:10,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:08:10,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:08:10,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:10,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940405714] [2022-11-21 16:08:10,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:08:10,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719185068] [2022-11-21 16:08:10,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719185068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:10,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:08:10,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-11-21 16:08:10,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137088534] [2022-11-21 16:08:10,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:10,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:08:10,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:10,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:08:10,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:08:10,600 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-21 16:08:10,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:10,826 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-21 16:08:10,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:08:10,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2022-11-21 16:08:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:10,835 INFO L225 Difference]: With dead ends: 39 [2022-11-21 16:08:10,838 INFO L226 Difference]: Without dead ends: 34 [2022-11-21 16:08:10,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:08:10,840 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:10,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 85 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:08:10,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-21 16:08:10,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2022-11-21 16:08:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-21 16:08:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-11-21 16:08:10,867 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 25 [2022-11-21 16:08:10,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:10,872 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-11-21 16:08:10,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-21 16:08:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-11-21 16:08:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-21 16:08:10,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:10,873 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:10,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:11,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:11,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:08:11,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:11,075 INFO L85 PathProgramCache]: Analyzing trace with hash -126969667, now seen corresponding path program 1 times [2022-11-21 16:08:11,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:11,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466543823] [2022-11-21 16:08:11,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:11,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:11,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:08:11,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148389312] [2022-11-21 16:08:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:11,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:11,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:11,087 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:11,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:08:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:11,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:08:11,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:08:11,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:08:11,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:11,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466543823] [2022-11-21 16:08:11,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:08:11,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148389312] [2022-11-21 16:08:11,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148389312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:11,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:08:11,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-21 16:08:11,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717455169] [2022-11-21 16:08:11,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:11,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:08:11,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:11,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:08:11,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:08:11,308 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-21 16:08:11,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:11,431 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-11-21 16:08:11,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:08:11,432 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2022-11-21 16:08:11,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:11,434 INFO L225 Difference]: With dead ends: 57 [2022-11-21 16:08:11,434 INFO L226 Difference]: Without dead ends: 52 [2022-11-21 16:08:11,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:08:11,435 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:11,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 101 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:08:11,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-21 16:08:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-21 16:08:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-21 16:08:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-11-21 16:08:11,468 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 28 [2022-11-21 16:08:11,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:11,469 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-11-21 16:08:11,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-21 16:08:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-11-21 16:08:11,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 16:08:11,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:11,475 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:11,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:11,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:11,682 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:08:11,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:11,683 INFO L85 PathProgramCache]: Analyzing trace with hash 972990450, now seen corresponding path program 2 times [2022-11-21 16:08:11,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:11,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433567006] [2022-11-21 16:08:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:11,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:11,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:08:11,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244345081] [2022-11-21 16:08:11,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:08:11,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:11,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:11,711 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:11,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:08:11,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:08:11,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:08:11,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 16:08:11,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:08:11,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 16:08:12,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:12,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433567006] [2022-11-21 16:08:12,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:08:12,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244345081] [2022-11-21 16:08:12,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244345081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:12,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:08:12,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-21 16:08:12,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838346487] [2022-11-21 16:08:12,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:12,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:08:12,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:12,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:08:12,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:08:12,115 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-21 16:08:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:12,409 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2022-11-21 16:08:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 16:08:12,411 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 55 [2022-11-21 16:08:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:12,420 INFO L225 Difference]: With dead ends: 111 [2022-11-21 16:08:12,420 INFO L226 Difference]: Without dead ends: 106 [2022-11-21 16:08:12,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:08:12,424 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 111 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:12,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 136 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:08:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-21 16:08:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-11-21 16:08:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-21 16:08:12,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2022-11-21 16:08:12,476 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 55 [2022-11-21 16:08:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:12,479 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2022-11-21 16:08:12,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-21 16:08:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2022-11-21 16:08:12,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-21 16:08:12,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:12,485 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:12,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:12,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:12,700 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:08:12,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:12,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1909967598, now seen corresponding path program 3 times [2022-11-21 16:08:12,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:12,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880959366] [2022-11-21 16:08:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:12,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:12,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:08:12,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14457132] [2022-11-21 16:08:12,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:08:12,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:12,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:12,719 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:12,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:08:19,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-21 16:08:19,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:08:19,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 16:08:19,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:08:20,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-21 16:08:20,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:20,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880959366] [2022-11-21 16:08:20,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:08:20,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14457132] [2022-11-21 16:08:20,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14457132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:20,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:08:20,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-11-21 16:08:20,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134667774] [2022-11-21 16:08:20,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:20,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 16:08:20,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:20,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 16:08:20,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:08:20,647 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-11-21 16:08:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:21,372 INFO L93 Difference]: Finished difference Result 219 states and 253 transitions. [2022-11-21 16:08:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-21 16:08:21,373 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 109 [2022-11-21 16:08:21,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:21,376 INFO L225 Difference]: With dead ends: 219 [2022-11-21 16:08:21,376 INFO L226 Difference]: Without dead ends: 214 [2022-11-21 16:08:21,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-11-21 16:08:21,379 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 252 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:21,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 278 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:08:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-21 16:08:21,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-11-21 16:08:21,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 165 states have (on average 1.1393939393939394) internal successors, (188), 165 states have internal predecessors, (188), 25 states have call successors, (25), 24 states have call predecessors, (25), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-21 16:08:21,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 237 transitions. [2022-11-21 16:08:21,464 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 237 transitions. Word has length 109 [2022-11-21 16:08:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:21,467 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 237 transitions. [2022-11-21 16:08:21,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-11-21 16:08:21,467 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 237 transitions. [2022-11-21 16:08:21,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-21 16:08:21,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:21,481 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:21,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-21 16:08:21,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 16:08:21,689 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:08:21,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:21,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1216739502, now seen corresponding path program 4 times [2022-11-21 16:08:21,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:21,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507882860] [2022-11-21 16:08:21,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:21,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:21,711 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:08:21,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542307176] [2022-11-21 16:08:21,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:08:21,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:21,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:21,713 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:21,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:08:21,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:08:21,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:08:21,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-21 16:08:21,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:08:22,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-11-21 16:08:23,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:23,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507882860] [2022-11-21 16:08:23,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:08:23,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542307176] [2022-11-21 16:08:23,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542307176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:23,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:08:23,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2022-11-21 16:08:23,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532750874] [2022-11-21 16:08:23,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:23,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-21 16:08:23,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:23,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-21 16:08:23,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-11-21 16:08:23,925 INFO L87 Difference]: Start difference. First operand 214 states and 237 transitions. Second operand has 50 states, 50 states have (on average 5.28) internal successors, (264), 50 states have internal predecessors, (264), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2022-11-21 16:08:25,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:25,968 INFO L93 Difference]: Finished difference Result 435 states and 505 transitions. [2022-11-21 16:08:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-21 16:08:25,969 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.28) internal successors, (264), 50 states have internal predecessors, (264), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) Word has length 217 [2022-11-21 16:08:25,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:25,972 INFO L225 Difference]: With dead ends: 435 [2022-11-21 16:08:25,972 INFO L226 Difference]: Without dead ends: 430 [2022-11-21 16:08:25,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-11-21 16:08:25,976 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 548 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:25,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 424 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:08:25,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-11-21 16:08:26,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 430. [2022-11-21 16:08:26,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 333 states have (on average 1.1411411411411412) internal successors, (380), 333 states have internal predecessors, (380), 49 states have call successors, (49), 48 states have call predecessors, (49), 47 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-21 16:08:26,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 477 transitions. [2022-11-21 16:08:26,052 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 477 transitions. Word has length 217 [2022-11-21 16:08:26,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:26,054 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 477 transitions. [2022-11-21 16:08:26,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.28) internal successors, (264), 50 states have internal predecessors, (264), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2022-11-21 16:08:26,054 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 477 transitions. [2022-11-21 16:08:26,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-11-21 16:08:26,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:26,063 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:26,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-21 16:08:26,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:26,269 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:08:26,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:26,270 INFO L85 PathProgramCache]: Analyzing trace with hash -623866926, now seen corresponding path program 5 times [2022-11-21 16:08:26,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:26,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754841930] [2022-11-21 16:08:26,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:26,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:26,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:08:26,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156060500] [2022-11-21 16:08:26,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:08:26,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:26,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:26,320 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:26,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:08:27,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-11-21 16:08:27,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:08:27,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-21 16:08:27,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 16:08:29,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2022-11-21 16:08:32,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:32,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754841930] [2022-11-21 16:08:32,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:08:32,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156060500] [2022-11-21 16:08:32,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156060500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:32,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:08:32,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 98 [2022-11-21 16:08:32,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929204184] [2022-11-21 16:08:32,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:32,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-21 16:08:32,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:32,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-21 16:08:32,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-11-21 16:08:32,965 INFO L87 Difference]: Start difference. First operand 430 states and 477 transitions. Second operand has 98 states, 98 states have (on average 5.387755102040816) internal successors, (528), 98 states have internal predecessors, (528), 95 states have call successors, (97), 49 states have call predecessors, (97), 48 states have return successors, (96), 94 states have call predecessors, (96), 94 states have call successors, (96) [2022-11-21 16:08:40,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:40,020 INFO L93 Difference]: Finished difference Result 867 states and 1009 transitions. [2022-11-21 16:08:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-11-21 16:08:40,024 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.387755102040816) internal successors, (528), 98 states have internal predecessors, (528), 95 states have call successors, (97), 49 states have call predecessors, (97), 48 states have return successors, (96), 94 states have call predecessors, (96), 94 states have call successors, (96) Word has length 433 [2022-11-21 16:08:40,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:40,029 INFO L225 Difference]: With dead ends: 867 [2022-11-21 16:08:40,029 INFO L226 Difference]: Without dead ends: 862 [2022-11-21 16:08:40,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 768 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2022-11-21 16:08:40,038 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 1876 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1876 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:40,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1876 Valid, 813 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-21 16:08:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-11-21 16:08:40,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2022-11-21 16:08:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 669 states have (on average 1.1420029895366217) internal successors, (764), 669 states have internal predecessors, (764), 97 states have call successors, (97), 96 states have call predecessors, (97), 95 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2022-11-21 16:08:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 957 transitions. [2022-11-21 16:08:40,158 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 957 transitions. Word has length 433 [2022-11-21 16:08:40,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:40,159 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 957 transitions. [2022-11-21 16:08:40,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.387755102040816) internal successors, (528), 98 states have internal predecessors, (528), 95 states have call successors, (97), 49 states have call predecessors, (97), 48 states have return successors, (96), 94 states have call predecessors, (96), 94 states have call successors, (96) [2022-11-21 16:08:40,160 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 957 transitions. [2022-11-21 16:08:40,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 866 [2022-11-21 16:08:40,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:40,189 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:40,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:40,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-21 16:08:40,397 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:08:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:40,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1106701102, now seen corresponding path program 6 times [2022-11-21 16:08:40,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:40,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583042846] [2022-11-21 16:08:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:40,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:40,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:08:40,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720024995] [2022-11-21 16:08:40,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:08:40,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:40,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:40,449 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:40,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50337aa9-5a52-4548-85b1-3dced1830831/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process