./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8 --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 47fbdb3da16165eeeef0687b73275c90a2682f5a520ac2387154637187559fe6 --- 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-e04fb08 [2022-11-16 11:34:55,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:34:55,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:34:55,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:34:55,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:34:55,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:34:55,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:34:55,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:34:55,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:34:55,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:34:55,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:34:55,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:34:55,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:34:55,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:34:55,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:34:55,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:34:55,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:34:55,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:34:55,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:34:55,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:34:55,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:34:55,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:34:55,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:34:55,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:34:55,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:34:55,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:34:55,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:34:55,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:34:55,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:34:55,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:34:55,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:34:55,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:34:55,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:34:55,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:34:55,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:34:55,473 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:34:55,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:34:55,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:34:55,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:34:55,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:34:55,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:34:55,478 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:34:55,504 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:34:55,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:34:55,504 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:34:55,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:34:55,505 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:34:55,506 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:34:55,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:34:55,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:34:55,507 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:34:55,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:34:55,508 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:34:55,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:34:55,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:34:55,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:34:55,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:34:55,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:34:55,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:34:55,510 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:34:55,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:34:55,510 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:34:55,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:34:55,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:34:55,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:34:55,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:34:55,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:34:55,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:34:55,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:34:55,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:34:55,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:34:55,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:34:55,513 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:34:55,513 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:34:55,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:34:55,514 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_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47fbdb3da16165eeeef0687b73275c90a2682f5a520ac2387154637187559fe6 [2022-11-16 11:34:55,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:34:55,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:34:55,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:34:55,912 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:34:55,913 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:34:55,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound100.c [2022-11-16 11:34:56,007 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/data/a0e391f45/8c405a2b9d724f6ba98ef66458b36330/FLAGcde024f01 [2022-11-16 11:34:56,636 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:34:56,637 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound100.c [2022-11-16 11:34:56,649 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/data/a0e391f45/8c405a2b9d724f6ba98ef66458b36330/FLAGcde024f01 [2022-11-16 11:34:56,971 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/data/a0e391f45/8c405a2b9d724f6ba98ef66458b36330 [2022-11-16 11:34:56,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:34:56,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:34:56,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:34:56,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:34:56,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:34:56,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:34:56" (1/1) ... [2022-11-16 11:34:56,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5494c022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:34:56, skipping insertion in model container [2022-11-16 11:34:56,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:34:56" (1/1) ... [2022-11-16 11:34:56,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:34:57,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:34:57,182 WARN L229 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_8787bcf5-d8fa-4274-806f-8895a55d21cd/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound100.c[458,471] [2022-11-16 11:34:57,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:34:57,238 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:34:57,256 WARN L229 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_8787bcf5-d8fa-4274-806f-8895a55d21cd/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound100.c[458,471] [2022-11-16 11:34:57,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:34:57,295 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:34:57,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:34:57 WrapperNode [2022-11-16 11:34:57,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:34:57,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:34:57,299 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:34:57,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:34:57,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:34:57" (1/1) ... [2022-11-16 11:34:57,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:34:57" (1/1) ... [2022-11-16 11:34:57,338 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2022-11-16 11:34:57,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:34:57,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:34:57,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:34:57,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:34:57,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:34:57" (1/1) ... [2022-11-16 11:34:57,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:34:57" (1/1) ... [2022-11-16 11:34:57,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:34:57" (1/1) ... [2022-11-16 11:34:57,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:34:57" (1/1) ... [2022-11-16 11:34:57,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:34:57" (1/1) ... [2022-11-16 11:34:57,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:34:57" (1/1) ... [2022-11-16 11:34:57,373 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:34:57" (1/1) ... [2022-11-16 11:34:57,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:34:57" (1/1) ... [2022-11-16 11:34:57,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:34:57,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:34:57,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:34:57,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:34:57,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:34:57" (1/1) ... [2022-11-16 11:34:57,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:34:57,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:34:57,422 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:34:57,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:34:57,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:34:57,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:34:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:34:57,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:34:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 11:34:57,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 11:34:57,557 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:34:57,560 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:34:57,727 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:34:57,738 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:34:57,739 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:34:57,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:34:57 BoogieIcfgContainer [2022-11-16 11:34:57,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:34:57,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:34:57,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:34:57,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:34:57,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:34:56" (1/3) ... [2022-11-16 11:34:57,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b29486e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:34:57, skipping insertion in model container [2022-11-16 11:34:57,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:34:57" (2/3) ... [2022-11-16 11:34:57,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b29486e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:34:57, skipping insertion in model container [2022-11-16 11:34:57,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:34:57" (3/3) ... [2022-11-16 11:34:57,773 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound100.c [2022-11-16 11:34:57,818 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:34:57,819 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:34:57,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:34:57,923 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;@3cbb5975, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:34:57,924 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:34:57,929 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 11:34:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:34:57,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:57,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:57,940 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:34:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:57,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1819788390, now seen corresponding path program 1 times [2022-11-16 11:34:57,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:34:57,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107702026] [2022-11-16 11:34:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:57,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:34:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:34:58,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:34:58,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107702026] [2022-11-16 11:34:58,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-16 11:34:58,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073802644] [2022-11-16 11:34:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:58,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:34:58,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:34:58,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:34:58,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:34:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:34:58,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 11:34:58,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:58,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:34:58,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073802644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:34:58,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:34:58,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:34:58,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904425727] [2022-11-16 11:34:58,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:34:58,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:34:58,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:34:58,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:34:58,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:34:58,363 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:58,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:58,405 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2022-11-16 11:34:58,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:34:58,409 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:34:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:58,426 INFO L225 Difference]: With dead ends: 34 [2022-11-16 11:34:58,427 INFO L226 Difference]: Without dead ends: 14 [2022-11-16 11:34:58,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:34:58,439 INFO L413 NwaCegarLoop]: 21 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, 21 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 [2022-11-16 11:34:58,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:34:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-16 11:34:58,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-16 11:34:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:34:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-16 11:34:58,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2022-11-16 11:34:58,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:58,497 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-16 11:34:58,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:58,499 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-16 11:34:58,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:34:58,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:58,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:58,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:34:58,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 11:34:58,706 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:34:58,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:58,707 INFO L85 PathProgramCache]: Analyzing trace with hash 178441499, now seen corresponding path program 1 times [2022-11-16 11:34:58,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:34:58,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808647706] [2022-11-16 11:34:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:58,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:34:58,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:34:58,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338555967] [2022-11-16 11:34:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:58,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:34:58,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:34:58,741 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:34:58,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:34:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:34:58,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:34:58,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:58,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:34:58,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:34:58,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808647706] [2022-11-16 11:34:58,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:34:58,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338555967] [2022-11-16 11:34:58,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338555967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:34:58,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:34:58,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:34:58,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734257141] [2022-11-16 11:34:58,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:34:58,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:34:58,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:34:58,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:34:58,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:34:58,875 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:58,897 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-11-16 11:34:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:34:58,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:34:58,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:58,899 INFO L225 Difference]: With dead ends: 24 [2022-11-16 11:34:58,899 INFO L226 Difference]: Without dead ends: 16 [2022-11-16 11:34:58,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:34:58,901 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 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 [2022-11-16 11:34:58,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:34:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-16 11:34:58,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-16 11:34:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:34:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-16 11:34:58,909 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2022-11-16 11:34:58,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:58,909 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-16 11:34:58,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:58,910 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-16 11:34:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:34:58,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:58,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:58,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:34:59,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-16 11:34:59,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:34:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:59,117 INFO L85 PathProgramCache]: Analyzing trace with hash 180228959, now seen corresponding path program 1 times [2022-11-16 11:34:59,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:34:59,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425875931] [2022-11-16 11:34:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:59,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:34:59,131 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:34:59,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742308890] [2022-11-16 11:34:59,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:59,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:34:59,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:34:59,141 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:34:59,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:34:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:34:59,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:34:59,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:59,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:34:59,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:34:59,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425875931] [2022-11-16 11:34:59,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:34:59,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742308890] [2022-11-16 11:34:59,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742308890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:34:59,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:34:59,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:34:59,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945788843] [2022-11-16 11:34:59,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:34:59,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:34:59,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:34:59,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:34:59,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:34:59,272 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:59,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:59,362 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-11-16 11:34:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:34:59,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:34:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:59,364 INFO L225 Difference]: With dead ends: 26 [2022-11-16 11:34:59,364 INFO L226 Difference]: Without dead ends: 22 [2022-11-16 11:34:59,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:34:59,367 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:59,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 48 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:34:59,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-16 11:34:59,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-16 11:34:59,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 16 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) [2022-11-16 11:34:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-16 11:34:59,376 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2022-11-16 11:34:59,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:59,376 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-16 11:34:59,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:34:59,377 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-16 11:34:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:34:59,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:59,378 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:34:59,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:34:59,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:34:59,584 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:34:59,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:34:59,585 INFO L85 PathProgramCache]: Analyzing trace with hash 823572993, now seen corresponding path program 1 times [2022-11-16 11:34:59,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:34:59,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626091816] [2022-11-16 11:34:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:59,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:34:59,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:34:59,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947433168] [2022-11-16 11:34:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:34:59,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:34:59,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:34:59,607 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:34:59,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:34:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:34:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:34:59,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:34:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:59,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:34:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:34:59,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:34:59,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626091816] [2022-11-16 11:34:59,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:34:59,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947433168] [2022-11-16 11:34:59,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947433168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:34:59,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:34:59,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-16 11:34:59,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295697939] [2022-11-16 11:34:59,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:34:59,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:34:59,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:34:59,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:34:59,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:34:59,854 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:34:59,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:34:59,973 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-11-16 11:34:59,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:34:59,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-11-16 11:34:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:34:59,975 INFO L225 Difference]: With dead ends: 56 [2022-11-16 11:34:59,975 INFO L226 Difference]: Without dead ends: 48 [2022-11-16 11:34:59,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:34:59,977 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:34:59,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 90 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:34:59,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-16 11:34:59,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-11-16 11:34:59,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 32 states have internal predecessors, (36), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 11:34:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-11-16 11:34:59,992 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 16 [2022-11-16 11:34:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:34:59,992 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-11-16 11:34:59,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:34:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-11-16 11:34:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:34:59,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:34:59,994 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:00,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:35:00,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:00,204 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:35:00,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:00,204 INFO L85 PathProgramCache]: Analyzing trace with hash 825360453, now seen corresponding path program 1 times [2022-11-16 11:35:00,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:00,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805753160] [2022-11-16 11:35:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:00,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:00,216 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:35:00,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126890272] [2022-11-16 11:35:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:00,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:00,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:35:00,222 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:35:00,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:35:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:00,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:35:00,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:35:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:00,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:35:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:00,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:00,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805753160] [2022-11-16 11:35:00,852 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:35:00,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126890272] [2022-11-16 11:35:00,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126890272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:35:00,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:35:00,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2022-11-16 11:35:00,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908644082] [2022-11-16 11:35:00,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:35:00,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:35:00,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:00,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:35:00,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:35:00,855 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:35:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:01,026 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-11-16 11:35:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:35:01,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-11-16 11:35:01,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:01,028 INFO L225 Difference]: With dead ends: 58 [2022-11-16 11:35:01,028 INFO L226 Difference]: Without dead ends: 47 [2022-11-16 11:35:01,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:35:01,030 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:01,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 69 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:35:01,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-16 11:35:01,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-11-16 11:35:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 11:35:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-11-16 11:35:01,044 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 16 [2022-11-16 11:35:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:01,044 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-11-16 11:35:01,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:35:01,045 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-11-16 11:35:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:35:01,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:01,046 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:01,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:35:01,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:01,252 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:35:01,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:01,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1696898494, now seen corresponding path program 1 times [2022-11-16 11:35:01,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:01,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113531420] [2022-11-16 11:35:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:01,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:01,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:35:01,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193748405] [2022-11-16 11:35:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:01,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:01,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:35:01,272 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:35:01,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:35:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:01,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:35:01,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:35:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:35:01,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:35:33,981 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) 4) 0)))) is different from true [2022-11-16 11:35:52,090 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-16 11:36:00,218 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:36:02,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:02,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113531420] [2022-11-16 11:36:02,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:36:02,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193748405] [2022-11-16 11:36:02,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193748405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:02,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:36:02,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-16 11:36:02,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999748042] [2022-11-16 11:36:02,279 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:02,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:36:02,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:02,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:36:02,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=121, Unknown=5, NotChecked=72, Total=240 [2022-11-16 11:36:02,281 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:36:02,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:02,476 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-11-16 11:36:02,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:36:02,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-11-16 11:36:02,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:02,481 INFO L225 Difference]: With dead ends: 46 [2022-11-16 11:36:02,481 INFO L226 Difference]: Without dead ends: 41 [2022-11-16 11:36:02,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=62, Invalid=185, Unknown=5, NotChecked=90, Total=342 [2022-11-16 11:36:02,483 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:02,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 69 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:36:02,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-16 11:36:02,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-16 11:36:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 11:36:02,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-11-16 11:36:02,500 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 22 [2022-11-16 11:36:02,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:02,502 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-11-16 11:36:02,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:36:02,504 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-11-16 11:36:02,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 11:36:02,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:02,509 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:02,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:02,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:36:02,716 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:02,716 INFO L85 PathProgramCache]: Analyzing trace with hash -47987544, now seen corresponding path program 2 times [2022-11-16 11:36:02,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:02,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489793803] [2022-11-16 11:36:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:02,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:02,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:36:02,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570426244] [2022-11-16 11:36:02,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:36:02,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:02,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:02,736 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:02,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:36:02,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:36:02,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:02,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:36:02,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:36:03,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:07,401 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:36:07,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:07,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489793803] [2022-11-16 11:36:07,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:36:07,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570426244] [2022-11-16 11:36:07,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570426244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:07,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:36:07,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-16 11:36:07,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708730671] [2022-11-16 11:36:07,419 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:07,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:36:07,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:07,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:36:07,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2022-11-16 11:36:07,420 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-11-16 11:36:07,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:07,632 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-11-16 11:36:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:36:07,633 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) Word has length 30 [2022-11-16 11:36:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:07,634 INFO L225 Difference]: With dead ends: 46 [2022-11-16 11:36:07,635 INFO L226 Difference]: Without dead ends: 41 [2022-11-16 11:36:07,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=56, Invalid=219, Unknown=1, NotChecked=30, Total=306 [2022-11-16 11:36:07,636 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:07,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 85 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:36:07,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-16 11:36:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-16 11:36:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 11:36:07,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-11-16 11:36:07,652 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 30 [2022-11-16 11:36:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:07,653 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-11-16 11:36:07,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-11-16 11:36:07,653 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-11-16 11:36:07,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 11:36:07,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:07,655 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:07,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:07,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:07,861 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash -584163058, now seen corresponding path program 3 times [2022-11-16 11:36:07,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:07,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972568561] [2022-11-16 11:36:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:07,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:07,875 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:36:07,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901072314] [2022-11-16 11:36:07,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:36:07,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:07,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:07,886 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:07,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:36:07,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:36:07,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 11:36:07,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:36:08,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:12,747 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (not (let ((.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (<= (div (+ (- (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (* (- 13) .cse0) (* (- 6) .cse1)) (- 4)) (+ |c_ULTIMATE.start_main_~x~0#1| (* .cse0 3) .cse1)))) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0)))) is different from false [2022-11-16 11:36:16,852 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:36:16,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:16,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972568561] [2022-11-16 11:36:16,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:36:16,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901072314] [2022-11-16 11:36:16,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901072314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:16,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:36:16,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-16 11:36:16,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694192034] [2022-11-16 11:36:16,857 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:16,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:36:16,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:16,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:36:16,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=255, Unknown=2, NotChecked=66, Total=380 [2022-11-16 11:36:16,859 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 11:36:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:17,185 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-11-16 11:36:17,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:36:17,188 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-11-16 11:36:17,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:17,190 INFO L225 Difference]: With dead ends: 48 [2022-11-16 11:36:17,190 INFO L226 Difference]: Without dead ends: 43 [2022-11-16 11:36:17,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=80, Invalid=346, Unknown=2, NotChecked=78, Total=506 [2022-11-16 11:36:17,191 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:17,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 138 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:36:17,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-16 11:36:17,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-16 11:36:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 11:36:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-11-16 11:36:17,212 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2022-11-16 11:36:17,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:17,213 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-11-16 11:36:17,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 11:36:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-11-16 11:36:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 11:36:17,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:17,215 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:17,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:17,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:17,421 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:17,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:17,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2045303987, now seen corresponding path program 2 times [2022-11-16 11:36:17,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:17,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955932246] [2022-11-16 11:36:17,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:17,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:17,434 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:36:17,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803907758] [2022-11-16 11:36:17,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:36:17,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:17,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:17,443 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:17,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:36:17,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:36:17,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:17,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:36:17,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:17,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:36:17,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:17,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955932246] [2022-11-16 11:36:17,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:36:17,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803907758] [2022-11-16 11:36:17,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803907758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:17,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:36:17,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-16 11:36:17,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172937909] [2022-11-16 11:36:17,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:17,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:36:17,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:17,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:36:17,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:36:17,809 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:36:18,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:18,103 INFO L93 Difference]: Finished difference Result 119 states and 125 transitions. [2022-11-16 11:36:18,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:36:18,104 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2022-11-16 11:36:18,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:18,105 INFO L225 Difference]: With dead ends: 119 [2022-11-16 11:36:18,106 INFO L226 Difference]: Without dead ends: 114 [2022-11-16 11:36:18,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:36:18,107 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 91 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:18,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 129 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:36:18,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-16 11:36:18,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 89. [2022-11-16 11:36:18,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 11:36:18,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2022-11-16 11:36:18,128 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 40 [2022-11-16 11:36:18,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:18,129 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2022-11-16 11:36:18,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:36:18,129 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2022-11-16 11:36:18,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 11:36:18,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:18,131 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:18,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:18,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:18,338 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:36:18,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:18,338 INFO L85 PathProgramCache]: Analyzing trace with hash -635357324, now seen corresponding path program 4 times [2022-11-16 11:36:18,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:18,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758406563] [2022-11-16 11:36:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:18,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:18,349 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:36:18,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634940287] [2022-11-16 11:36:18,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:36:18,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:18,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:18,352 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:18,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:36:18,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:36:18,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:18,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 11:36:18,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:36:18,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:57,260 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_16| Int)) (or (= (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_16| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_16|)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 2) 1)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3)) 4) 0)))) is different from true [2022-11-16 11:37:15,430 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_16| Int)) (or (= (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_16| (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_16|)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 2) 1)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_27| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-16 11:38:00,120 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 3)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 16 (* |c_ULTIMATE.start_main_~y~0#1| 8)) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:38:02,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:02,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758406563] [2022-11-16 11:38:02,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:38:02,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634940287] [2022-11-16 11:38:02,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634940287] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:02,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:38:02,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-16 11:38:02,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103345342] [2022-11-16 11:38:02,156 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:02,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:38:02,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:02,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:38:02,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=277, Unknown=10, NotChecked=108, Total=462 [2022-11-16 11:38:02,158 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 11:38:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:38:02,504 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2022-11-16 11:38:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:38:02,505 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2022-11-16 11:38:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:38:02,506 INFO L225 Difference]: With dead ends: 94 [2022-11-16 11:38:02,507 INFO L226 Difference]: Without dead ends: 89 [2022-11-16 11:38:02,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=86, Invalid=378, Unknown=10, NotChecked=126, Total=600 [2022-11-16 11:38:02,508 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:38:02,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 159 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:38:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-16 11:38:02,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-16 11:38:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 67 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 11:38:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2022-11-16 11:38:02,532 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 46 [2022-11-16 11:38:02,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:38:02,533 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2022-11-16 11:38:02,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 11:38:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2022-11-16 11:38:02,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 11:38:02,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:38:02,535 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:02,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:02,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:02,744 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:38:02,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:02,745 INFO L85 PathProgramCache]: Analyzing trace with hash 220350426, now seen corresponding path program 5 times [2022-11-16 11:38:02,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:02,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574685964] [2022-11-16 11:38:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:02,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:02,754 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:38:02,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310647458] [2022-11-16 11:38:02,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:38:02,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:02,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:02,756 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:02,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:38:02,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-16 11:38:02,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:02,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 11:38:02,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 70 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 11:38:03,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:03,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:03,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574685964] [2022-11-16 11:38:03,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:38:03,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310647458] [2022-11-16 11:38:03,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310647458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:03,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:38:03,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-16 11:38:03,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310474553] [2022-11-16 11:38:03,509 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:03,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:38:03,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:03,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:38:03,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:38:03,512 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 11:38:03,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:38:03,893 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-11-16 11:38:03,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:38:03,893 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 54 [2022-11-16 11:38:03,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:38:03,895 INFO L225 Difference]: With dead ends: 94 [2022-11-16 11:38:03,895 INFO L226 Difference]: Without dead ends: 89 [2022-11-16 11:38:03,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:38:03,896 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:38:03,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 197 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:38:03,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-16 11:38:03,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-16 11:38:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 11:38:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-11-16 11:38:03,936 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 54 [2022-11-16 11:38:03,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:38:03,937 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-11-16 11:38:03,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 11:38:03,937 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-11-16 11:38:03,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 11:38:03,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:38:03,947 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:03,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:04,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:38:04,157 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:38:04,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:04,157 INFO L85 PathProgramCache]: Analyzing trace with hash 156734016, now seen corresponding path program 6 times [2022-11-16 11:38:04,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:04,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658667914] [2022-11-16 11:38:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:04,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:04,182 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:38:04,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880924723] [2022-11-16 11:38:04,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:38:04,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:04,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:04,184 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:04,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:38:04,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-16 11:38:04,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:04,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 11:38:04,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 11:38:04,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:05,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:05,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658667914] [2022-11-16 11:38:05,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:38:05,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880924723] [2022-11-16 11:38:05,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880924723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:05,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:38:05,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-16 11:38:05,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678536335] [2022-11-16 11:38:05,024 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:05,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:38:05,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:05,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:38:05,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:38:05,026 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 11:38:05,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:38:05,436 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2022-11-16 11:38:05,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:38:05,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 62 [2022-11-16 11:38:05,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:38:05,439 INFO L225 Difference]: With dead ends: 94 [2022-11-16 11:38:05,440 INFO L226 Difference]: Without dead ends: 89 [2022-11-16 11:38:05,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:38:05,441 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:38:05,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 221 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:38:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-16 11:38:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-16 11:38:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 11:38:05,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-11-16 11:38:05,461 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 62 [2022-11-16 11:38:05,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:38:05,462 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-11-16 11:38:05,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 11:38:05,462 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-11-16 11:38:05,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 11:38:05,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:38:05,464 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:05,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-16 11:38:05,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:38:05,675 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:38:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:05,675 INFO L85 PathProgramCache]: Analyzing trace with hash -605612378, now seen corresponding path program 7 times [2022-11-16 11:38:05,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:05,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600674984] [2022-11-16 11:38:05,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:05,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:05,698 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:38:05,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821817610] [2022-11-16 11:38:05,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:38:05,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:05,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:05,706 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:05,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:38:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:05,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-16 11:38:05,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 36 proven. 113 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-16 11:38:06,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:52,578 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_33| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_33|))))) is different from true [2022-11-16 11:39:10,649 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_33| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_56| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_33|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-16 11:39:18,798 WARN L833 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) |c_ULTIMATE.start_main_~k~0#1|)) (not (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:39:28,886 WARN L833 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 2 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 4) 4)) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:40:23,721 WARN L833 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 5) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 25) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 5 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:40:33,812 WARN L833 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 12) 36) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 6 |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 6) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 5) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:40:43,911 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 6)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 7) |ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 49 (* |c_ULTIMATE.start_main_~y~0#1| 14)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|) (* 7 |ULTIMATE.start_main_~k~0#1|))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:40:45,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:40:45,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600674984] [2022-11-16 11:40:45,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:40:45,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821817610] [2022-11-16 11:40:45,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821817610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:40:45,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:40:45,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-16 11:40:45,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628460522] [2022-11-16 11:40:45,947 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:45,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:40:45,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:40:45,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:40:45,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=343, Unknown=21, NotChecked=308, Total=756 [2022-11-16 11:40:45,949 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:40:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:48,509 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2022-11-16 11:40:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:40:48,510 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 70 [2022-11-16 11:40:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:48,511 INFO L225 Difference]: With dead ends: 94 [2022-11-16 11:40:48,511 INFO L226 Difference]: Without dead ends: 89 [2022-11-16 11:40:48,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 69.0s TimeCoverageRelationStatistics Valid=106, Invalid=452, Unknown=22, NotChecked=350, Total=930 [2022-11-16 11:40:48,514 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:48,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 285 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:40:48,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-16 11:40:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-16 11:40:48,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 11:40:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-11-16 11:40:48,539 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 70 [2022-11-16 11:40:48,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:48,540 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-11-16 11:40:48,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:40:48,540 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-11-16 11:40:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 11:40:48,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:48,542 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:48,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:48,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:40:48,760 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:40:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash 200725772, now seen corresponding path program 8 times [2022-11-16 11:40:48,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:40:48,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532466019] [2022-11-16 11:40:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:48,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:40:48,772 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:40:48,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627611029] [2022-11-16 11:40:48,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:40:48,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:48,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:40:48,774 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:40:48,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:40:48,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:40:48,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:40:48,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 11:40:48,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 38 proven. 148 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-16 11:40:49,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:53,618 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:40:53,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:40:53,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532466019] [2022-11-16 11:40:53,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:40:53,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627611029] [2022-11-16 11:40:53,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627611029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:40:53,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:40:53,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-16 11:40:53,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462796481] [2022-11-16 11:40:53,622 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:53,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:40:53,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:40:53,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:40:53,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=328, Unknown=1, NotChecked=36, Total=420 [2022-11-16 11:40:53,623 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 11:40:54,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:54,146 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2022-11-16 11:40:54,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:40:54,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 78 [2022-11-16 11:40:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:54,149 INFO L225 Difference]: With dead ends: 94 [2022-11-16 11:40:54,149 INFO L226 Difference]: Without dead ends: 89 [2022-11-16 11:40:54,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=74, Invalid=435, Unknown=1, NotChecked=42, Total=552 [2022-11-16 11:40:54,151 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:54,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 335 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:40:54,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-16 11:40:54,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-16 11:40:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 11:40:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-11-16 11:40:54,166 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 78 [2022-11-16 11:40:54,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:54,167 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-11-16 11:40:54,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 11:40:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-11-16 11:40:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-16 11:40:54,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:54,170 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:54,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:54,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 11:40:54,376 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:40:54,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:54,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1699951246, now seen corresponding path program 9 times [2022-11-16 11:40:54,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:40:54,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502810211] [2022-11-16 11:40:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:54,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:40:54,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:40:54,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432983399] [2022-11-16 11:40:54,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:40:54,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:54,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:40:54,389 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:40:54,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:40:54,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-16 11:40:54,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:40:54,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 11:40:54,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 28 proven. 199 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-16 11:40:55,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:55,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:40:55,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502810211] [2022-11-16 11:40:55,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:40:55,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432983399] [2022-11-16 11:40:55,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432983399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:40:55,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:40:55,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-11-16 11:40:55,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684641417] [2022-11-16 11:40:55,367 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:55,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:40:55,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:40:55,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:40:55,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:40:55,369 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 11:40:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:55,979 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2022-11-16 11:40:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:40:55,980 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 86 [2022-11-16 11:40:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:55,981 INFO L225 Difference]: With dead ends: 96 [2022-11-16 11:40:55,982 INFO L226 Difference]: Without dead ends: 91 [2022-11-16 11:40:55,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:40:55,983 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:55,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 365 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:40:55,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-16 11:40:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-16 11:40:55,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 11:40:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-11-16 11:40:55,999 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2022-11-16 11:40:55,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:55,999 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-11-16 11:40:56,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 11:40:56,000 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-11-16 11:40:56,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-16 11:40:56,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:56,002 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:56,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:56,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:56,208 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:40:56,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:56,209 INFO L85 PathProgramCache]: Analyzing trace with hash -780287977, now seen corresponding path program 3 times [2022-11-16 11:40:56,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:40:56,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917808696] [2022-11-16 11:40:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:56,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:40:56,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:40:56,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158791488] [2022-11-16 11:40:56,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:40:56,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:56,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:40:56,222 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:40:56,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:40:56,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 11:40:56,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:40:56,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:40:56,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:56,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-16 11:40:57,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:40:57,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917808696] [2022-11-16 11:40:57,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:40:57,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158791488] [2022-11-16 11:40:57,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158791488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:40:57,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:40:57,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-11-16 11:40:57,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803693038] [2022-11-16 11:40:57,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:57,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 11:40:57,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:40:57,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 11:40:57,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:40:57,162 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-16 11:40:57,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:57,923 INFO L93 Difference]: Finished difference Result 245 states and 257 transitions. [2022-11-16 11:40:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-16 11:40:57,924 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2022-11-16 11:40:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:57,926 INFO L225 Difference]: With dead ends: 245 [2022-11-16 11:40:57,927 INFO L226 Difference]: Without dead ends: 240 [2022-11-16 11:40:57,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 11:40:57,929 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 226 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:57,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 214 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:40:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-16 11:40:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 185. [2022-11-16 11:40:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0935251798561152) internal successors, (152), 139 states have internal predecessors, (152), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 11:40:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 197 transitions. [2022-11-16 11:40:57,960 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 197 transitions. Word has length 88 [2022-11-16 11:40:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:57,961 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 197 transitions. [2022-11-16 11:40:57,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 26 states have internal predecessors, (104), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-16 11:40:57,962 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 197 transitions. [2022-11-16 11:40:57,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-16 11:40:57,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:57,963 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:57,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:58,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:58,172 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:40:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:58,172 INFO L85 PathProgramCache]: Analyzing trace with hash 53411800, now seen corresponding path program 10 times [2022-11-16 11:40:58,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:40:58,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973302942] [2022-11-16 11:40:58,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:58,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:40:58,195 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:40:58,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322284766] [2022-11-16 11:40:58,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:40:58,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:58,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:40:58,197 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:40:58,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:40:59,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:40:59,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:40:59,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 11:40:59,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 24 proven. 248 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-16 11:40:59,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:59,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:40:59,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973302942] [2022-11-16 11:40:59,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:40:59,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322284766] [2022-11-16 11:40:59,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322284766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:40:59,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:40:59,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-16 11:40:59,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603186118] [2022-11-16 11:40:59,916 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:59,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:40:59,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:40:59,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:40:59,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:40:59,918 INFO L87 Difference]: Start difference. First operand 185 states and 197 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 11:41:00,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:00,613 INFO L93 Difference]: Finished difference Result 190 states and 201 transitions. [2022-11-16 11:41:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:41:00,613 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 94 [2022-11-16 11:41:00,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:00,615 INFO L225 Difference]: With dead ends: 190 [2022-11-16 11:41:00,615 INFO L226 Difference]: Without dead ends: 185 [2022-11-16 11:41:00,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:41:00,617 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:00,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 421 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:41:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-16 11:41:00,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-16 11:41:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0863309352517985) internal successors, (151), 139 states have internal predecessors, (151), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 11:41:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 196 transitions. [2022-11-16 11:41:00,657 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 196 transitions. Word has length 94 [2022-11-16 11:41:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:00,658 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 196 transitions. [2022-11-16 11:41:00,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 11:41:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 196 transitions. [2022-11-16 11:41:00,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-16 11:41:00,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:00,660 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:00,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:00,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:41:00,862 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:00,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:00,863 INFO L85 PathProgramCache]: Analyzing trace with hash 983788606, now seen corresponding path program 11 times [2022-11-16 11:41:00,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:00,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848563082] [2022-11-16 11:41:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:00,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:00,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:41:00,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871200294] [2022-11-16 11:41:00,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:41:00,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:00,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:00,875 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:00,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:41:01,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-16 11:41:01,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:41:01,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 11:41:01,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 50 proven. 271 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-16 11:41:01,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:01,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:01,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848563082] [2022-11-16 11:41:01,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:41:01,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871200294] [2022-11-16 11:41:01,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871200294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:01,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:41:01,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-11-16 11:41:01,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148685550] [2022-11-16 11:41:01,913 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:01,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:41:01,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:01,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:41:01,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:41:01,915 INFO L87 Difference]: Start difference. First operand 185 states and 196 transitions. Second operand has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 11:41:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:02,669 INFO L93 Difference]: Finished difference Result 190 states and 200 transitions. [2022-11-16 11:41:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:41:02,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 102 [2022-11-16 11:41:02,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:02,671 INFO L225 Difference]: With dead ends: 190 [2022-11-16 11:41:02,671 INFO L226 Difference]: Without dead ends: 185 [2022-11-16 11:41:02,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:41:02,673 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:02,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 509 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:41:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-16 11:41:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-16 11:41:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.079136690647482) internal successors, (150), 139 states have internal predecessors, (150), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 11:41:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 195 transitions. [2022-11-16 11:41:02,699 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 195 transitions. Word has length 102 [2022-11-16 11:41:02,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:02,700 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 195 transitions. [2022-11-16 11:41:02,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 11:41:02,701 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 195 transitions. [2022-11-16 11:41:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-16 11:41:02,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:02,702 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:02,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:02,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:41:02,909 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:02,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:02,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1339026780, now seen corresponding path program 12 times [2022-11-16 11:41:02,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:02,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6954959] [2022-11-16 11:41:02,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:02,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:02,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:41:02,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571276160] [2022-11-16 11:41:02,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:41:02,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:02,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:02,921 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:02,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:41:03,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-16 11:41:03,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:41:03,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 11:41:03,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 49 proven. 325 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-16 11:41:03,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:04,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:04,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6954959] [2022-11-16 11:41:04,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:41:04,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571276160] [2022-11-16 11:41:04,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571276160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:04,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:41:04,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-16 11:41:04,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213147243] [2022-11-16 11:41:04,072 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:04,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:41:04,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:04,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:41:04,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:41:04,074 INFO L87 Difference]: Start difference. First operand 185 states and 195 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 11:41:04,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:04,901 INFO L93 Difference]: Finished difference Result 190 states and 199 transitions. [2022-11-16 11:41:04,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:41:04,902 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 110 [2022-11-16 11:41:04,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:04,904 INFO L225 Difference]: With dead ends: 190 [2022-11-16 11:41:04,904 INFO L226 Difference]: Without dead ends: 185 [2022-11-16 11:41:04,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:41:04,905 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:04,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 545 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:41:04,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-16 11:41:04,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-16 11:41:04,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0719424460431655) internal successors, (149), 139 states have internal predecessors, (149), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 11:41:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 194 transitions. [2022-11-16 11:41:04,930 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 194 transitions. Word has length 110 [2022-11-16 11:41:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:04,930 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 194 transitions. [2022-11-16 11:41:04,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 11:41:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 194 transitions. [2022-11-16 11:41:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-16 11:41:04,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:04,933 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:04,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:05,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:05,140 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:41:05,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:05,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1291514634, now seen corresponding path program 13 times [2022-11-16 11:41:05,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:05,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798825959] [2022-11-16 11:41:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:05,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:05,152 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:41:05,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980372384] [2022-11-16 11:41:05,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:41:05,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:05,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:05,157 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:05,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:41:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:05,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-16 11:41:05,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 66 proven. 365 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-11-16 11:41:06,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:49,012 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_69| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| 3)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_69|))))) is different from true [2022-11-16 11:42:07,089 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_69| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| 3)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_143| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_69|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-16 11:42:55,784 WARN L833 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 2) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 2 |c_ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 4) 4)) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:47:38,117 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 12)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 13) |ULTIMATE.start_main_~k~0#1|) (= (+ 169 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 26)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|) (* |ULTIMATE.start_main_~k~0#1| 13))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:47:40,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:40,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798825959] [2022-11-16 11:47:40,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:47:40,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980372384] [2022-11-16 11:47:40,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980372384] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:40,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:47:40,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-11-16 11:47:40,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019734695] [2022-11-16 11:47:40,144 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:40,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:47:40,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:47:40,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1001, Unknown=40, NotChecked=284, Total=1560 [2022-11-16 11:47:40,146 INFO L87 Difference]: Start difference. First operand 185 states and 194 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 11:47:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:40,935 INFO L93 Difference]: Finished difference Result 190 states and 198 transitions. [2022-11-16 11:47:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:47:40,936 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 118 [2022-11-16 11:47:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:40,937 INFO L225 Difference]: With dead ends: 190 [2022-11-16 11:47:40,937 INFO L226 Difference]: Without dead ends: 185 [2022-11-16 11:47:40,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 256.0s TimeCoverageRelationStatistics Valid=255, Invalid=1203, Unknown=40, NotChecked=308, Total=1806 [2022-11-16 11:47:40,939 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 7 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:40,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 613 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:47:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-16 11:47:40,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-16 11:47:40,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.064748201438849) internal successors, (148), 139 states have internal predecessors, (148), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 11:47:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 193 transitions. [2022-11-16 11:47:40,959 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 193 transitions. Word has length 118 [2022-11-16 11:47:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:40,960 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 193 transitions. [2022-11-16 11:47:40,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 11:47:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 193 transitions. [2022-11-16 11:47:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-16 11:47:40,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:40,962 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:40,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:41,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:41,168 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:41,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:41,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1948913008, now seen corresponding path program 14 times [2022-11-16 11:47:41,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:41,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239162309] [2022-11-16 11:47:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:41,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:41,178 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:47:41,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871377885] [2022-11-16 11:47:41,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:47:41,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:41,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:41,179 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:41,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:47:41,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:47:41,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:41,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-16 11:47:41,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 68 proven. 424 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-16 11:47:41,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:46,180 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:47:46,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:46,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239162309] [2022-11-16 11:47:46,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:47:46,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871377885] [2022-11-16 11:47:46,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871377885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:46,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:47:46,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-16 11:47:46,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199766219] [2022-11-16 11:47:46,183 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:46,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 11:47:46,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:46,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 11:47:46,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=580, Unknown=1, NotChecked=48, Total=702 [2022-11-16 11:47:46,184 INFO L87 Difference]: Start difference. First operand 185 states and 193 transitions. Second operand has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 11:47:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:47,015 INFO L93 Difference]: Finished difference Result 190 states and 197 transitions. [2022-11-16 11:47:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:47:47,015 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 126 [2022-11-16 11:47:47,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:47,017 INFO L225 Difference]: With dead ends: 190 [2022-11-16 11:47:47,017 INFO L226 Difference]: Without dead ends: 185 [2022-11-16 11:47:47,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=92, Invalid=723, Unknown=1, NotChecked=54, Total=870 [2022-11-16 11:47:47,018 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:47,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 719 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:47:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-16 11:47:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-16 11:47:47,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 139 states have (on average 1.0575539568345325) internal successors, (147), 139 states have internal predecessors, (147), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 11:47:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 192 transitions. [2022-11-16 11:47:47,035 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 192 transitions. Word has length 126 [2022-11-16 11:47:47,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:47,035 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 192 transitions. [2022-11-16 11:47:47,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 11:47:47,036 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 192 transitions. [2022-11-16 11:47:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-16 11:47:47,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:47,037 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:47,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:47,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 11:47:47,249 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:47,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:47,249 INFO L85 PathProgramCache]: Analyzing trace with hash 48456150, now seen corresponding path program 15 times [2022-11-16 11:47:47,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:47,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121841560] [2022-11-16 11:47:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:47,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:47,265 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:47:47,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381609242] [2022-11-16 11:47:47,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:47:47,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:47,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:47,266 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:47,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8787bcf5-d8fa-4274-806f-8895a55d21cd/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 11:47:47,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-16 11:47:47,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:47,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-16 11:47:47,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 58 proven. 499 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-11-16 11:47:48,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:53,110 WARN L833 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 12) 36) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 6 |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 6) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 5) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:48:13,164 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_107| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_107|) (* 6 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_107|)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196|) 36 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| 12))) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| 3)) 4) 0)))) is different from true [2022-11-16 11:48:31,213 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_107| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_107|) (* 6 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_107|)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196|) 36 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| 12))) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_196| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-16 11:49:48,976 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 8) |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 9) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 18) 81) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 9 |c_ULTIMATE.start_main_~k~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2022-11-16 11:49:59,046 WARN L833 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 20) 100) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 10 |c_ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 10) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 9) |c_ULTIMATE.start_main_~k~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false