./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/tree_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN --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 e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- 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-6b4ec56 [2022-11-20 10:29:59,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:29:59,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:29:59,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:29:59,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:29:59,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:29:59,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:29:59,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:29:59,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:29:59,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:29:59,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:29:59,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:29:59,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:29:59,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:29:59,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:29:59,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:29:59,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:29:59,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:29:59,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:29:59,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:29:59,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:29:59,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:29:59,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:29:59,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:29:59,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:29:59,378 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:29:59,379 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:29:59,380 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:29:59,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:29:59,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:29:59,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:29:59,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:29:59,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:29:59,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:29:59,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:29:59,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:29:59,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:29:59,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:29:59,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:29:59,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:29:59,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:29:59,408 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:29:59,444 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:29:59,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:29:59,444 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:29:59,445 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:29:59,445 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:29:59,446 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:29:59,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:29:59,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:29:59,447 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:29:59,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:29:59,447 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:29:59,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:29:59,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:29:59,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:29:59,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:29:59,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:29:59,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:29:59,449 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:29:59,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:29:59,449 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:29:59,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:29:59,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:29:59,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:29:59,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:29:59,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:29:59,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:29:59,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:29:59,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:29:59,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:29:59,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:29:59,460 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:29:59,460 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:29:59,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:29:59,461 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_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2022-11-20 10:29:59,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:29:59,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:29:59,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:29:59,799 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:29:59,800 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:29:59,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/verifythis/tree_max.c [2022-11-20 10:30:02,870 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:30:03,162 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:30:03,162 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/sv-benchmarks/c/verifythis/tree_max.c [2022-11-20 10:30:03,169 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/data/d8ea600fb/11bc7e9670fb4027b24b8299d12c076f/FLAG708517b97 [2022-11-20 10:30:03,184 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/data/d8ea600fb/11bc7e9670fb4027b24b8299d12c076f [2022-11-20 10:30:03,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:30:03,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:30:03,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:03,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:30:03,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:30:03,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:03" (1/1) ... [2022-11-20 10:30:03,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@747e26e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:03, skipping insertion in model container [2022-11-20 10:30:03,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:30:03" (1/1) ... [2022-11-20 10:30:03,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:30:03,217 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:30:03,374 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-11-20 10:30:03,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:03,404 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:30:03,416 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-11-20 10:30:03,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:30:03,438 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:30:03,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:03 WrapperNode [2022-11-20 10:30:03,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:30:03,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:03,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:30:03,441 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:30:03,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:03" (1/1) ... [2022-11-20 10:30:03,474 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:03" (1/1) ... [2022-11-20 10:30:03,496 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 38 [2022-11-20 10:30:03,496 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:30:03,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:30:03,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:30:03,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:30:03,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:03" (1/1) ... [2022-11-20 10:30:03,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:03" (1/1) ... [2022-11-20 10:30:03,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:03" (1/1) ... [2022-11-20 10:30:03,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:03" (1/1) ... [2022-11-20 10:30:03,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:03" (1/1) ... [2022-11-20 10:30:03,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:03" (1/1) ... [2022-11-20 10:30:03,540 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:03" (1/1) ... [2022-11-20 10:30:03,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:03" (1/1) ... [2022-11-20 10:30:03,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:30:03,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:30:03,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:30:03,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:30:03,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:03" (1/1) ... [2022-11-20 10:30:03,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:30:03,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:03,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:30:03,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:30:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 10:30:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:30:03,640 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-11-20 10:30:03,640 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-11-20 10:30:03,640 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-11-20 10:30:03,640 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-11-20 10:30:03,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:30:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-11-20 10:30:03,641 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-11-20 10:30:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 10:30:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:30:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:30:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:30:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:30:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:30:03,755 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:30:03,757 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:30:03,979 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:30:04,007 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:30:04,007 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 10:30:04,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:04 BoogieIcfgContainer [2022-11-20 10:30:04,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:30:04,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:30:04,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:30:04,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:30:04,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:30:03" (1/3) ... [2022-11-20 10:30:04,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab903e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:04, skipping insertion in model container [2022-11-20 10:30:04,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:30:03" (2/3) ... [2022-11-20 10:30:04,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab903e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:30:04, skipping insertion in model container [2022-11-20 10:30:04,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:30:04" (3/3) ... [2022-11-20 10:30:04,018 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_max.c [2022-11-20 10:30:04,059 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:30:04,060 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:30:04,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:30:04,119 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;@279a7208, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:30:04,119 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:30:04,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 10:30:04,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 10:30:04,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:04,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:04,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:04,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:04,140 INFO L85 PathProgramCache]: Analyzing trace with hash 998783614, now seen corresponding path program 1 times [2022-11-20 10:30:04,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:04,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938438367] [2022-11-20 10:30:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:04,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:04,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:30:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:04,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 10:30:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:30:04,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:04,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938438367] [2022-11-20 10:30:04,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938438367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:04,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:04,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 10:30:04,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154950803] [2022-11-20 10:30:04,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:04,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:30:04,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:04,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:30:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:30:04,928 INFO L87 Difference]: Start difference. First operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 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) [2022-11-20 10:30:05,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:05,411 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2022-11-20 10:30:05,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:30:05,414 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 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 18 [2022-11-20 10:30:05,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:05,425 INFO L225 Difference]: With dead ends: 74 [2022-11-20 10:30:05,426 INFO L226 Difference]: Without dead ends: 35 [2022-11-20 10:30:05,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:30:05,441 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:05,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 100 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:30:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-20 10:30:05,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-20 10:30:05,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 10:30:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-11-20 10:30:05,502 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 18 [2022-11-20 10:30:05,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:05,503 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-11-20 10:30:05,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 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) [2022-11-20 10:30:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-11-20 10:30:05,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 10:30:05,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:05,509 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:05,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:30:05,510 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:05,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:05,512 INFO L85 PathProgramCache]: Analyzing trace with hash -976273983, now seen corresponding path program 1 times [2022-11-20 10:30:05,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:05,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641135483] [2022-11-20 10:30:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:05,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:05,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:30:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:05,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:30:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:05,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:30:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:05,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 10:30:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:30:06,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:06,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641135483] [2022-11-20 10:30:06,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641135483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:30:06,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:30:06,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 10:30:06,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353899003] [2022-11-20 10:30:06,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:30:06,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:30:06,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:06,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:30:06,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:30:06,015 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 10:30:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:06,268 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-11-20 10:30:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:30:06,269 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-11-20 10:30:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:06,270 INFO L225 Difference]: With dead ends: 48 [2022-11-20 10:30:06,271 INFO L226 Difference]: Without dead ends: 37 [2022-11-20 10:30:06,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:30:06,273 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:06,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 92 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:30:06,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-20 10:30:06,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-20 10:30:06,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-20 10:30:06,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-11-20 10:30:06,309 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2022-11-20 10:30:06,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:06,309 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-11-20 10:30:06,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 10:30:06,310 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-11-20 10:30:06,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 10:30:06,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:06,311 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:06,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:30:06,312 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:06,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1376325807, now seen corresponding path program 1 times [2022-11-20 10:30:06,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:06,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255910182] [2022-11-20 10:30:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:06,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:06,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:30:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:06,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:30:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:06,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:30:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:06,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 10:30:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:07,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:30:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:07,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:30:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:30:07,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:07,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255910182] [2022-11-20 10:30:07,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255910182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:07,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279264026] [2022-11-20 10:30:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:07,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:07,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:07,103 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:07,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:30:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:07,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 10:30:07,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:07,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 10:30:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 10:30:07,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:07,910 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 10:30:07,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 10:30:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:30:07,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279264026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:07,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:07,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 22 [2022-11-20 10:30:07,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238260534] [2022-11-20 10:30:07,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:07,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 10:30:07,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:07,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 10:30:07,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:30:07,958 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-20 10:30:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:08,663 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-11-20 10:30:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 10:30:08,663 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2022-11-20 10:30:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:08,665 INFO L225 Difference]: With dead ends: 46 [2022-11-20 10:30:08,665 INFO L226 Difference]: Without dead ends: 44 [2022-11-20 10:30:08,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 10:30:08,667 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:08,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 153 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:30:08,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-20 10:30:08,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-11-20 10:30:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-20 10:30:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-11-20 10:30:08,677 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 41 [2022-11-20 10:30:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:08,678 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-11-20 10:30:08,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-20 10:30:08,678 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-11-20 10:30:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 10:30:08,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:08,684 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:08,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:08,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:08,891 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:08,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:08,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2126921006, now seen corresponding path program 1 times [2022-11-20 10:30:08,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:08,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60526685] [2022-11-20 10:30:08,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:08,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:09,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:30:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:09,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:30:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:09,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:30:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:09,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 10:30:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:09,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:30:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:09,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:30:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 10:30:09,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:09,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60526685] [2022-11-20 10:30:09,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60526685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:09,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272541137] [2022-11-20 10:30:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:09,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:09,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:09,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:09,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:30:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:10,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-20 10:30:10,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:10,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:30:10,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:30:10,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 10:30:10,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 10:30:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:30:10,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:18,953 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:30:25,065 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:30:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:30:25,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272541137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:25,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:25,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 13] total 29 [2022-11-20 10:30:25,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462747031] [2022-11-20 10:30:25,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:25,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 10:30:25,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:25,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 10:30:25,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=732, Unknown=1, NotChecked=0, Total=812 [2022-11-20 10:30:25,196 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-20 10:30:26,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:26,710 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2022-11-20 10:30:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 10:30:26,711 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 47 [2022-11-20 10:30:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:26,713 INFO L225 Difference]: With dead ends: 76 [2022-11-20 10:30:26,713 INFO L226 Difference]: Without dead ends: 64 [2022-11-20 10:30:26,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=239, Invalid=1922, Unknown=1, NotChecked=0, Total=2162 [2022-11-20 10:30:26,715 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 112 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:26,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 307 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 941 Invalid, 0 Unknown, 149 Unchecked, 0.7s Time] [2022-11-20 10:30:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-20 10:30:26,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-11-20 10:30:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.225) internal successors, (49), 42 states have internal predecessors, (49), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-20 10:30:26,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-11-20 10:30:26,728 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 47 [2022-11-20 10:30:26,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:26,729 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-11-20 10:30:26,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-20 10:30:26,729 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-11-20 10:30:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 10:30:26,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:26,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:26,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 10:30:26,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:26,937 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:26,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2051682644, now seen corresponding path program 1 times [2022-11-20 10:30:26,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:26,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799058751] [2022-11-20 10:30:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:26,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:27,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:30:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:27,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:30:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:27,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:30:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:27,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 10:30:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:27,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:30:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:27,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:30:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:30:27,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:27,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799058751] [2022-11-20 10:30:27,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799058751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:27,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739683967] [2022-11-20 10:30:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:27,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:27,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:27,713 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:27,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:30:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:27,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-20 10:30:27,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:27,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:30:27,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:30:28,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 10:30:28,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 10:30:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:30:28,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:36,566 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:30:42,675 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:30:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:30:42,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739683967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:30:42,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:30:42,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 13] total 28 [2022-11-20 10:30:42,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363852453] [2022-11-20 10:30:42,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:42,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 10:30:42,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:42,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 10:30:42,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=686, Unknown=1, NotChecked=0, Total=756 [2022-11-20 10:30:42,820 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2022-11-20 10:30:44,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:44,242 INFO L93 Difference]: Finished difference Result 152 states and 212 transitions. [2022-11-20 10:30:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 10:30:44,243 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) Word has length 47 [2022-11-20 10:30:44,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:44,245 INFO L225 Difference]: With dead ends: 152 [2022-11-20 10:30:44,245 INFO L226 Difference]: Without dead ends: 90 [2022-11-20 10:30:44,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=212, Invalid=1949, Unknown=1, NotChecked=0, Total=2162 [2022-11-20 10:30:44,248 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:44,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 257 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 946 Invalid, 0 Unknown, 87 Unchecked, 0.7s Time] [2022-11-20 10:30:44,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-20 10:30:44,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2022-11-20 10:30:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (32), 15 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-20 10:30:44,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2022-11-20 10:30:44,266 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 47 [2022-11-20 10:30:44,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:44,267 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2022-11-20 10:30:44,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2022-11-20 10:30:44,267 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2022-11-20 10:30:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 10:30:44,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:44,270 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:44,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:44,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:44,477 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:44,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash -945278837, now seen corresponding path program 2 times [2022-11-20 10:30:44,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:44,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924379863] [2022-11-20 10:30:44,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:44,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:45,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:30:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:45,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:30:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:45,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:30:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:45,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:30:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:45,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:30:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:45,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 10:30:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:46,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:30:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:46,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:30:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:46,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:30:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:46,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:30:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 10:30:46,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:46,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924379863] [2022-11-20 10:30:46,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924379863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:46,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036091188] [2022-11-20 10:30:46,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:30:46,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:46,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:46,567 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:46,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:30:46,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:30:46,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:30:46,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-20 10:30:46,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:46,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:30:46,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:30:47,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-20 10:30:47,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-20 10:30:47,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-20 10:30:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 10:30:47,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:48,822 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:30:48,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 34 [2022-11-20 10:30:49,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036091188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:49,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:30:49,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 47 [2022-11-20 10:30:49,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473251009] [2022-11-20 10:30:49,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:49,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 10:30:49,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:49,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 10:30:49,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3142, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 10:30:49,185 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-20 10:30:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:30:53,371 INFO L93 Difference]: Finished difference Result 163 states and 287 transitions. [2022-11-20 10:30:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 10:30:53,372 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 70 [2022-11-20 10:30:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:30:53,375 INFO L225 Difference]: With dead ends: 163 [2022-11-20 10:30:53,376 INFO L226 Difference]: Without dead ends: 161 [2022-11-20 10:30:53,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=546, Invalid=7110, Unknown=0, NotChecked=0, Total=7656 [2022-11-20 10:30:53,380 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 163 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 2188 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 2273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:30:53,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 348 Invalid, 2273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2188 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 10:30:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-20 10:30:53,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2022-11-20 10:30:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 96 states have (on average 1.21875) internal successors, (117), 98 states have internal predecessors, (117), 20 states have call successors, (20), 11 states have call predecessors, (20), 17 states have return successors, (86), 24 states have call predecessors, (86), 12 states have call successors, (86) [2022-11-20 10:30:53,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 223 transitions. [2022-11-20 10:30:53,415 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 223 transitions. Word has length 70 [2022-11-20 10:30:53,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:30:53,416 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 223 transitions. [2022-11-20 10:30:53,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-20 10:30:53,416 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 223 transitions. [2022-11-20 10:30:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 10:30:53,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:30:53,420 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:30:53,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:30:53,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 10:30:53,626 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:30:53,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:30:53,626 INFO L85 PathProgramCache]: Analyzing trace with hash -909256420, now seen corresponding path program 1 times [2022-11-20 10:30:53,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:30:53,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221760233] [2022-11-20 10:30:53,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:53,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:30:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:54,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:30:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:54,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:30:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:54,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:30:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:54,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:30:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:54,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:30:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:54,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 10:30:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:55,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:30:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:55,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:30:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:55,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:30:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:55,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:30:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 10:30:55,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:30:55,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221760233] [2022-11-20 10:30:55,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221760233] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:55,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389086262] [2022-11-20 10:30:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:30:55,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:30:55,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:30:55,556 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:30:55,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:30:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:30:55,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 10:30:55,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:30:55,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:30:55,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:30:56,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-20 10:30:56,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-20 10:30:56,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-20 10:30:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 10:30:56,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:30:57,424 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-11-20 10:30:57,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:30:57,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389086262] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:30:57,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:30:57,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22] total 45 [2022-11-20 10:30:57,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83264742] [2022-11-20 10:30:57,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:30:57,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 10:30:57,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:30:57,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 10:30:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2719, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 10:30:57,726 INFO L87 Difference]: Start difference. First operand 134 states and 223 transitions. Second operand has 45 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 32 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 8 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-20 10:31:05,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:05,421 INFO L93 Difference]: Finished difference Result 248 states and 449 transitions. [2022-11-20 10:31:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-20 10:31:05,428 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 32 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 8 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 71 [2022-11-20 10:31:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:05,440 INFO L225 Difference]: With dead ends: 248 [2022-11-20 10:31:05,440 INFO L226 Difference]: Without dead ends: 246 [2022-11-20 10:31:05,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=891, Invalid=11099, Unknown=0, NotChecked=0, Total=11990 [2022-11-20 10:31:05,448 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 183 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 3945 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 4033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 3945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:05,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 375 Invalid, 4033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 3945 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 10:31:05,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-20 10:31:05,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 152. [2022-11-20 10:31:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 114 states have internal predecessors, (133), 20 states have call successors, (20), 11 states have call predecessors, (20), 23 states have return successors, (122), 26 states have call predecessors, (122), 12 states have call successors, (122) [2022-11-20 10:31:05,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 275 transitions. [2022-11-20 10:31:05,497 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 275 transitions. Word has length 71 [2022-11-20 10:31:05,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:05,497 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 275 transitions. [2022-11-20 10:31:05,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 32 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 8 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-20 10:31:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 275 transitions. [2022-11-20 10:31:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 10:31:05,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:05,502 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:05,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:05,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:05,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:31:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:05,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1931785932, now seen corresponding path program 2 times [2022-11-20 10:31:05,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:05,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520973046] [2022-11-20 10:31:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:05,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:05,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:05,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:05,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:31:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:05,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:31:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:05,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:31:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:05,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:31:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:05,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 10:31:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:06,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:06,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:31:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:06,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:06,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:31:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 10:31:06,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:06,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520973046] [2022-11-20 10:31:06,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520973046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:06,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000109793] [2022-11-20 10:31:06,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:31:06,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:06,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:06,170 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:06,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:31:06,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:31:06,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:31:06,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:31:06,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 10:31:06,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 10:31:07,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000109793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:07,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:07,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 21 [2022-11-20 10:31:07,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93615360] [2022-11-20 10:31:07,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:07,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 10:31:07,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:07,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 10:31:07,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:31:07,027 INFO L87 Difference]: Start difference. First operand 152 states and 275 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-20 10:31:08,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:08,429 INFO L93 Difference]: Finished difference Result 305 states and 651 transitions. [2022-11-20 10:31:08,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 10:31:08,430 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 71 [2022-11-20 10:31:08,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:08,434 INFO L225 Difference]: With dead ends: 305 [2022-11-20 10:31:08,434 INFO L226 Difference]: Without dead ends: 175 [2022-11-20 10:31:08,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 152 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 10:31:08,439 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 137 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:08,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 185 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:31:08,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-20 10:31:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 154. [2022-11-20 10:31:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 111 states have (on average 1.1711711711711712) internal successors, (130), 114 states have internal predecessors, (130), 20 states have call successors, (20), 11 states have call predecessors, (20), 22 states have return successors, (117), 28 states have call predecessors, (117), 12 states have call successors, (117) [2022-11-20 10:31:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 267 transitions. [2022-11-20 10:31:08,480 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 267 transitions. Word has length 71 [2022-11-20 10:31:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:08,483 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 267 transitions. [2022-11-20 10:31:08,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-20 10:31:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 267 transitions. [2022-11-20 10:31:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 10:31:08,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:08,486 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:08,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:08,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:08,693 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:31:08,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:08,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1914561797, now seen corresponding path program 1 times [2022-11-20 10:31:08,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:08,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786227455] [2022-11-20 10:31:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:08,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:09,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:09,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:31:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:09,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:31:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:09,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:31:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:09,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:31:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:09,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 10:31:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:09,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:09,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:31:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:10,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:10,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:31:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 10:31:10,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:10,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786227455] [2022-11-20 10:31:10,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786227455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:10,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294188318] [2022-11-20 10:31:10,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:10,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:10,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:10,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:10,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:31:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:10,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-20 10:31:10,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:10,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:31:10,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:31:11,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-20 10:31:11,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-20 10:31:11,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-20 10:31:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 10:31:11,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:12,748 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:12,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2022-11-20 10:31:13,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294188318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:13,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:31:13,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 48 [2022-11-20 10:31:13,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079409940] [2022-11-20 10:31:13,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:13,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 10:31:13,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:13,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 10:31:13,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3835, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 10:31:13,758 INFO L87 Difference]: Start difference. First operand 154 states and 267 transitions. Second operand has 48 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 34 states have internal predecessors, (66), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-20 10:31:17,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:17,625 INFO L93 Difference]: Finished difference Result 187 states and 312 transitions. [2022-11-20 10:31:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 10:31:17,625 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 34 states have internal predecessors, (66), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 72 [2022-11-20 10:31:17,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:17,629 INFO L225 Difference]: With dead ends: 187 [2022-11-20 10:31:17,629 INFO L226 Difference]: Without dead ends: 185 [2022-11-20 10:31:17,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=697, Invalid=9005, Unknown=0, NotChecked=0, Total=9702 [2022-11-20 10:31:17,634 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 136 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1943 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:17,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 332 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1943 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 10:31:17,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-20 10:31:17,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 149. [2022-11-20 10:31:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 110 states have internal predecessors, (125), 20 states have call successors, (20), 11 states have call predecessors, (20), 21 states have return successors, (111), 27 states have call predecessors, (111), 12 states have call successors, (111) [2022-11-20 10:31:17,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 256 transitions. [2022-11-20 10:31:17,665 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 256 transitions. Word has length 72 [2022-11-20 10:31:17,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:17,667 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 256 transitions. [2022-11-20 10:31:17,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 34 states have internal predecessors, (66), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-20 10:31:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 256 transitions. [2022-11-20 10:31:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 10:31:17,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:17,672 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:17,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 10:31:17,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 10:31:17,879 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:31:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:17,879 INFO L85 PathProgramCache]: Analyzing trace with hash 872853690, now seen corresponding path program 1 times [2022-11-20 10:31:17,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:17,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273048253] [2022-11-20 10:31:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:17,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:19,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:19,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:31:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:19,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:31:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:19,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:31:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:19,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:31:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:19,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 10:31:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:19,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:19,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:31:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:19,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:19,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:31:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 10:31:19,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:19,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273048253] [2022-11-20 10:31:19,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273048253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:19,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173638617] [2022-11-20 10:31:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:19,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:19,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:19,749 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:19,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:31:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:19,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 10:31:19,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:19,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:31:19,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:31:20,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-20 10:31:20,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 10:31:20,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 10:31:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 10:31:20,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:21,275 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-11-20 10:31:21,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 10:31:21,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173638617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:21,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:31:21,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 43 [2022-11-20 10:31:21,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936246186] [2022-11-20 10:31:21,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:21,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 10:31:21,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:21,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 10:31:21,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 10:31:21,513 INFO L87 Difference]: Start difference. First operand 149 states and 256 transitions. Second operand has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-20 10:31:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:23,935 INFO L93 Difference]: Finished difference Result 185 states and 295 transitions. [2022-11-20 10:31:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 10:31:23,936 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) Word has length 72 [2022-11-20 10:31:23,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:23,938 INFO L225 Difference]: With dead ends: 185 [2022-11-20 10:31:23,939 INFO L226 Difference]: Without dead ends: 183 [2022-11-20 10:31:23,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=361, Invalid=4469, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 10:31:23,941 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:23,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 363 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 10:31:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-20 10:31:23,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2022-11-20 10:31:23,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 98 states have (on average 1.183673469387755) internal successors, (116), 99 states have internal predecessors, (116), 19 states have call successors, (19), 10 states have call predecessors, (19), 18 states have return successors, (93), 26 states have call predecessors, (93), 12 states have call successors, (93) [2022-11-20 10:31:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 228 transitions. [2022-11-20 10:31:23,963 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 228 transitions. Word has length 72 [2022-11-20 10:31:23,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:23,964 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 228 transitions. [2022-11-20 10:31:23,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-20 10:31:23,964 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 228 transitions. [2022-11-20 10:31:23,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 10:31:23,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:23,966 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:23,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:24,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:31:24,172 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:31:24,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:24,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1209697001, now seen corresponding path program 2 times [2022-11-20 10:31:24,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:24,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224521930] [2022-11-20 10:31:24,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:24,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:24,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:25,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:31:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:25,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:31:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:25,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:31:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:25,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:31:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:25,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 10:31:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:25,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:25,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:25,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:31:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:25,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 10:31:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-20 10:31:25,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:25,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224521930] [2022-11-20 10:31:25,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224521930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:25,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244502492] [2022-11-20 10:31:25,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:31:25,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:25,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:25,892 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:25,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:31:26,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:31:26,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:31:26,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 10:31:26,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:26,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:31:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 10:31:28,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 10:31:29,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244502492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:31:29,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:31:29,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 13] total 41 [2022-11-20 10:31:29,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246531891] [2022-11-20 10:31:29,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:29,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 10:31:29,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:29,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 10:31:29,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1523, Unknown=1, NotChecked=0, Total=1640 [2022-11-20 10:31:29,438 INFO L87 Difference]: Start difference. First operand 136 states and 228 transitions. Second operand has 41 states, 34 states have (on average 2.323529411764706) internal successors, (79), 31 states have internal predecessors, (79), 16 states have call successors, (27), 6 states have call predecessors, (27), 13 states have return successors, (24), 18 states have call predecessors, (24), 14 states have call successors, (24) [2022-11-20 10:31:39,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:39,677 INFO L93 Difference]: Finished difference Result 262 states and 444 transitions. [2022-11-20 10:31:39,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 10:31:39,677 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 2.323529411764706) internal successors, (79), 31 states have internal predecessors, (79), 16 states have call successors, (27), 6 states have call predecessors, (27), 13 states have return successors, (24), 18 states have call predecessors, (24), 14 states have call successors, (24) Word has length 70 [2022-11-20 10:31:39,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:39,681 INFO L225 Difference]: With dead ends: 262 [2022-11-20 10:31:39,681 INFO L226 Difference]: Without dead ends: 234 [2022-11-20 10:31:39,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=359, Invalid=4328, Unknown=5, NotChecked=0, Total=4692 [2022-11-20 10:31:39,683 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 102 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:39,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 497 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1254 Invalid, 0 Unknown, 269 Unchecked, 1.0s Time] [2022-11-20 10:31:39,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-20 10:31:39,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 180. [2022-11-20 10:31:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 129 states have (on average 1.186046511627907) internal successors, (153), 129 states have internal predecessors, (153), 25 states have call successors, (25), 13 states have call predecessors, (25), 25 states have return successors, (160), 37 states have call predecessors, (160), 17 states have call successors, (160) [2022-11-20 10:31:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 338 transitions. [2022-11-20 10:31:39,711 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 338 transitions. Word has length 70 [2022-11-20 10:31:39,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:39,712 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 338 transitions. [2022-11-20 10:31:39,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 2.323529411764706) internal successors, (79), 31 states have internal predecessors, (79), 16 states have call successors, (27), 6 states have call predecessors, (27), 13 states have return successors, (24), 18 states have call predecessors, (24), 14 states have call successors, (24) [2022-11-20 10:31:39,712 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 338 transitions. [2022-11-20 10:31:39,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-20 10:31:39,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:39,715 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:39,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:39,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 10:31:39,921 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:31:39,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:39,922 INFO L85 PathProgramCache]: Analyzing trace with hash -817093939, now seen corresponding path program 1 times [2022-11-20 10:31:39,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:39,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849145038] [2022-11-20 10:31:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:39,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:41,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:41,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:31:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:41,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:31:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:41,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:31:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:41,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:31:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:41,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:31:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:41,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:31:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:41,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 10:31:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:41,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:41,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:31:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:41,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:42,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:31:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 43 proven. 30 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 10:31:42,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:42,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849145038] [2022-11-20 10:31:42,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849145038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:42,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148414413] [2022-11-20 10:31:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:42,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:42,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:42,063 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:42,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:31:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:42,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 139 conjunts are in the unsatisfiable core [2022-11-20 10:31:42,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:42,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:31:42,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 10:31:42,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 10:31:42,911 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base Int)) (and (exists ((v_ArrVal_1339 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_1339))) (= (select |c_old(#valid)| nondet_tree_~n~0.base) 0) (exists ((v_ArrVal_1340 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_1340))))) is different from true [2022-11-20 10:31:42,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:31:42,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 10:31:42,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:31:42,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 10:31:43,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 10:31:43,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 10:31:43,157 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-20 10:31:43,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 10:31:43,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 10:31:43,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 10:31:44,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:31:44,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:44,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2022-11-20 10:31:44,651 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 10:31:44,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-11-20 10:31:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 16 proven. 58 refuted. 1 times theorem prover too weak. 44 trivial. 12 not checked. [2022-11-20 10:31:44,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:46,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:46,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 132 [2022-11-20 10:31:46,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:31:46,422 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 10:31:46,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 237 treesize of output 225 [2022-11-20 10:31:46,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:31:46,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 191 [2022-11-20 10:31:46,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:31:46,454 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 10:31:46,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 284 [2022-11-20 10:31:46,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 283 [2022-11-20 10:31:46,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 320 treesize of output 304 [2022-11-20 10:31:46,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 181 [2022-11-20 10:31:46,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 183 [2022-11-20 10:31:46,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148414413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:46,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:31:46,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29] total 50 [2022-11-20 10:31:46,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440554619] [2022-11-20 10:31:46,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:31:46,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 10:31:46,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:31:46,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 10:31:46,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3232, Unknown=5, NotChecked=114, Total=3540 [2022-11-20 10:31:46,619 INFO L87 Difference]: Start difference. First operand 180 states and 338 transitions. Second operand has 50 states, 41 states have (on average 2.097560975609756) internal successors, (86), 36 states have internal predecessors, (86), 19 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) [2022-11-20 10:31:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:31:50,918 INFO L93 Difference]: Finished difference Result 471 states and 945 transitions. [2022-11-20 10:31:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-20 10:31:50,920 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 41 states have (on average 2.097560975609756) internal successors, (86), 36 states have internal predecessors, (86), 19 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) Word has length 86 [2022-11-20 10:31:50,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:31:50,928 INFO L225 Difference]: With dead ends: 471 [2022-11-20 10:31:50,928 INFO L226 Difference]: Without dead ends: 458 [2022-11-20 10:31:50,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3056 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=700, Invalid=11069, Unknown=7, NotChecked=214, Total=11990 [2022-11-20 10:31:50,932 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 171 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 2777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1198 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:31:50,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 873 Invalid, 2777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1524 Invalid, 0 Unknown, 1198 Unchecked, 1.1s Time] [2022-11-20 10:31:50,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-11-20 10:31:50,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 362. [2022-11-20 10:31:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 264 states have (on average 1.2121212121212122) internal successors, (320), 266 states have internal predecessors, (320), 40 states have call successors, (40), 23 states have call predecessors, (40), 57 states have return successors, (379), 72 states have call predecessors, (379), 26 states have call successors, (379) [2022-11-20 10:31:51,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 739 transitions. [2022-11-20 10:31:51,001 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 739 transitions. Word has length 86 [2022-11-20 10:31:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:31:51,001 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 739 transitions. [2022-11-20 10:31:51,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 41 states have (on average 2.097560975609756) internal successors, (86), 36 states have internal predecessors, (86), 19 states have call successors, (27), 11 states have call predecessors, (27), 13 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) [2022-11-20 10:31:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 739 transitions. [2022-11-20 10:31:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-20 10:31:51,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:31:51,006 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:31:51,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:31:51,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 10:31:51,213 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:31:51,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:31:51,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2002652069, now seen corresponding path program 3 times [2022-11-20 10:31:51,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:31:51,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406066291] [2022-11-20 10:31:51,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:31:51,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:31:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:52,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:52,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:31:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:52,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:31:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:53,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:31:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:53,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:31:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:53,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:31:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:53,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:31:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:53,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 10:31:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:53,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:53,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:31:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:53,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:31:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:53,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:31:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:31:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-20 10:31:53,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:31:53,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406066291] [2022-11-20 10:31:53,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406066291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:31:53,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714000709] [2022-11-20 10:31:53,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:31:53,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:31:53,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:53,127 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:31:53,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:31:53,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:31:53,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:31:53,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-20 10:31:53,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:31:53,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 10:31:53,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 10:31:53,575 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-20 10:31:53,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 10:31:53,598 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2022-11-20 10:31:53,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 36 [2022-11-20 10:31:56,361 INFO L321 Elim1Store]: treesize reduction 28, result has 65.4 percent of original size [2022-11-20 10:31:56,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 122 [2022-11-20 10:31:56,432 INFO L321 Elim1Store]: treesize reduction 24, result has 66.2 percent of original size [2022-11-20 10:31:56,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 120 [2022-11-20 10:31:57,365 INFO L321 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2022-11-20 10:31:57,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 33 [2022-11-20 10:31:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 10:31:57,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:31:58,950 INFO L321 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2022-11-20 10:31:58,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-20 10:32:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-20 10:32:00,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714000709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:32:00,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:32:00,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26, 22] total 61 [2022-11-20 10:32:00,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886686774] [2022-11-20 10:32:00,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:00,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-20 10:32:00,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:32:00,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-20 10:32:00,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=3452, Unknown=0, NotChecked=0, Total=3660 [2022-11-20 10:32:00,967 INFO L87 Difference]: Start difference. First operand 362 states and 739 transitions. Second operand has 61 states, 51 states have (on average 1.8823529411764706) internal successors, (96), 41 states have internal predecessors, (96), 17 states have call successors, (30), 12 states have call predecessors, (30), 10 states have return successors, (22), 17 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-20 10:32:12,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:12,652 INFO L93 Difference]: Finished difference Result 684 states and 1239 transitions. [2022-11-20 10:32:12,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-20 10:32:12,653 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 51 states have (on average 1.8823529411764706) internal successors, (96), 41 states have internal predecessors, (96), 17 states have call successors, (30), 12 states have call predecessors, (30), 10 states have return successors, (22), 17 states have call predecessors, (22), 9 states have call successors, (22) Word has length 86 [2022-11-20 10:32:12,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:12,660 INFO L225 Difference]: With dead ends: 684 [2022-11-20 10:32:12,661 INFO L226 Difference]: Without dead ends: 643 [2022-11-20 10:32:12,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3359 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=1068, Invalid=14183, Unknown=1, NotChecked=0, Total=15252 [2022-11-20 10:32:12,664 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 228 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 3580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1369 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:12,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 830 Invalid, 3580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2166 Invalid, 0 Unknown, 1369 Unchecked, 1.7s Time] [2022-11-20 10:32:12,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-11-20 10:32:12,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 503. [2022-11-20 10:32:12,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 373 states have (on average 1.198391420911528) internal successors, (447), 368 states have internal predecessors, (447), 62 states have call successors, (62), 40 states have call predecessors, (62), 67 states have return successors, (495), 94 states have call predecessors, (495), 31 states have call successors, (495) [2022-11-20 10:32:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1004 transitions. [2022-11-20 10:32:12,775 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1004 transitions. Word has length 86 [2022-11-20 10:32:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:12,776 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 1004 transitions. [2022-11-20 10:32:12,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 51 states have (on average 1.8823529411764706) internal successors, (96), 41 states have internal predecessors, (96), 17 states have call successors, (30), 12 states have call predecessors, (30), 10 states have return successors, (22), 17 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-20 10:32:12,777 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1004 transitions. [2022-11-20 10:32:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-20 10:32:12,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:12,784 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:12,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:12,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 10:32:12,991 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:32:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:12,991 INFO L85 PathProgramCache]: Analyzing trace with hash -342918118, now seen corresponding path program 3 times [2022-11-20 10:32:12,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:32:12,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423186437] [2022-11-20 10:32:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:12,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:32:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:13,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:32:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:14,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:32:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:14,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:32:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:17,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:32:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:19,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:32:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:19,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:32:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:19,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:32:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:19,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 10:32:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:19,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:32:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:19,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:32:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:19,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:32:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:19,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 10:32:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:19,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:32:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:19,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:32:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:19,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:32:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:19,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:32:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:20,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:32:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:20,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:32:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 31 proven. 109 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-11-20 10:32:20,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:32:20,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423186437] [2022-11-20 10:32:20,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423186437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:20,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674689890] [2022-11-20 10:32:20,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:32:20,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:20,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:32:20,011 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:32:20,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 10:32:20,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 10:32:20,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:20,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-20 10:32:20,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:20,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:32:20,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 10:32:20,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 10:32:20,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 10:32:20,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 10:32:21,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 20 [2022-11-20 10:32:21,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 20 [2022-11-20 10:32:21,107 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base Int) (v_arrayElimArr_6 (Array Int Int)) (v_arrayElimArr_5 (Array Int Int))) (and (= (select v_arrayElimArr_6 4) 0) (= (select v_arrayElimArr_5 4) 0) (= (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_arrayElimArr_6) |c_#memory_$Pointer$.offset|) (= (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_arrayElimArr_5) |c_#memory_$Pointer$.base|))) is different from true [2022-11-20 10:32:21,444 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base Int)) (and (exists ((v_DerPreprocessor_1 (Array Int Int)) (v_arrayElimArr_6 (Array Int Int)) (v_arrayElimArr_5 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int)) (v_nondet_tree_~n~0.base_78 Int) (v_ArrVal_1948 (Array Int Int)) (v_ArrVal_1947 (Array Int Int))) (and (= (select v_arrayElimArr_6 4) 0) (= (select v_arrayElimArr_5 4) 0) (= |c_#memory_$Pointer$.offset| (store (store (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_DerPreprocessor_2) v_nondet_tree_~n~0.base_78 v_arrayElimArr_6) nondet_tree_~n~0.base v_ArrVal_1948)) (= (store (store (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_DerPreprocessor_1) v_nondet_tree_~n~0.base_78 v_arrayElimArr_5) nondet_tree_~n~0.base v_ArrVal_1947) |c_#memory_$Pointer$.base|))) (= (select |c_old(#valid)| nondet_tree_~n~0.base) 0))) is different from true [2022-11-20 10:32:21,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:21,506 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-20 10:32:21,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 31 [2022-11-20 10:32:21,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:21,535 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-20 10:32:21,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 31 [2022-11-20 10:32:21,565 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 10:32:21,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 10:32:21,593 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 10:32:21,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 10:32:21,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 10:32:21,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 10:32:22,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 10:32:22,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 10:32:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 278 trivial. 22 not checked. [2022-11-20 10:32:22,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:23,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:32:23,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2022-11-20 10:32:23,925 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:32:23,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 50 [2022-11-20 10:32:24,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674689890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:24,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:32:24,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 43 [2022-11-20 10:32:24,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375552961] [2022-11-20 10:32:24,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:24,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 10:32:24,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:32:24,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 10:32:24,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2086, Unknown=17, NotChecked=186, Total=2450 [2022-11-20 10:32:24,379 INFO L87 Difference]: Start difference. First operand 503 states and 1004 transitions. Second operand has 43 states, 35 states have (on average 2.142857142857143) internal successors, (75), 31 states have internal predecessors, (75), 19 states have call successors, (28), 9 states have call predecessors, (28), 12 states have return successors, (23), 18 states have call predecessors, (23), 17 states have call successors, (23) [2022-11-20 10:32:29,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:29,053 INFO L93 Difference]: Finished difference Result 739 states and 1500 transitions. [2022-11-20 10:32:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 10:32:29,054 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 35 states have (on average 2.142857142857143) internal successors, (75), 31 states have internal predecessors, (75), 19 states have call successors, (28), 9 states have call predecessors, (28), 12 states have return successors, (23), 18 states have call predecessors, (23), 17 states have call successors, (23) Word has length 119 [2022-11-20 10:32:29,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:29,063 INFO L225 Difference]: With dead ends: 739 [2022-11-20 10:32:29,063 INFO L226 Difference]: Without dead ends: 672 [2022-11-20 10:32:29,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=437, Invalid=4934, Unknown=39, NotChecked=290, Total=5700 [2022-11-20 10:32:29,066 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 116 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 566 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:29,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 457 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1045 Invalid, 0 Unknown, 566 Unchecked, 0.9s Time] [2022-11-20 10:32:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-11-20 10:32:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 595. [2022-11-20 10:32:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 436 states have (on average 1.2155963302752293) internal successors, (530), 434 states have internal predecessors, (530), 71 states have call successors, (71), 44 states have call predecessors, (71), 87 states have return successors, (594), 116 states have call predecessors, (594), 42 states have call successors, (594) [2022-11-20 10:32:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1195 transitions. [2022-11-20 10:32:29,194 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1195 transitions. Word has length 119 [2022-11-20 10:32:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:29,194 INFO L495 AbstractCegarLoop]: Abstraction has 595 states and 1195 transitions. [2022-11-20 10:32:29,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 35 states have (on average 2.142857142857143) internal successors, (75), 31 states have internal predecessors, (75), 19 states have call successors, (28), 9 states have call predecessors, (28), 12 states have return successors, (23), 18 states have call predecessors, (23), 17 states have call successors, (23) [2022-11-20 10:32:29,195 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1195 transitions. [2022-11-20 10:32:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 10:32:29,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:29,201 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:29,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:29,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:29,409 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:32:29,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:29,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1479239555, now seen corresponding path program 4 times [2022-11-20 10:32:29,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:32:29,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227839035] [2022-11-20 10:32:29,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:29,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:32:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:30,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:32:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:30,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:32:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:30,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:32:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:30,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:32:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:30,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:32:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:30,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 10:32:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:30,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:32:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:30,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:32:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:30,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:32:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:30,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 10:32:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 10:32:30,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:32:30,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227839035] [2022-11-20 10:32:30,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227839035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:30,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022666421] [2022-11-20 10:32:30,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:32:30,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:30,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:32:30,558 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:32:30,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 10:32:30,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:32:30,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:30,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-20 10:32:30,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:31,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-20 10:32:31,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 10:32:31,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 10:32:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 10:32:31,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:31,654 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-11-20 10:32:31,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 10:32:31,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022666421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:31,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:32:31,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 30 [2022-11-20 10:32:31,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096120858] [2022-11-20 10:32:31,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:31,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 10:32:31,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:32:31,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 10:32:31,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 10:32:31,848 INFO L87 Difference]: Start difference. First operand 595 states and 1195 transitions. Second operand has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-20 10:32:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:33,473 INFO L93 Difference]: Finished difference Result 661 states and 1284 transitions. [2022-11-20 10:32:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 10:32:33,474 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) Word has length 70 [2022-11-20 10:32:33,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:33,481 INFO L225 Difference]: With dead ends: 661 [2022-11-20 10:32:33,482 INFO L226 Difference]: Without dead ends: 659 [2022-11-20 10:32:33,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=284, Invalid=2908, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 10:32:33,484 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:33,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 251 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 10:32:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-11-20 10:32:33,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 638. [2022-11-20 10:32:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 472 states have (on average 1.2097457627118644) internal successors, (571), 465 states have internal predecessors, (571), 78 states have call successors, (78), 50 states have call predecessors, (78), 87 states have return successors, (594), 122 states have call predecessors, (594), 42 states have call successors, (594) [2022-11-20 10:32:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1243 transitions. [2022-11-20 10:32:33,626 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1243 transitions. Word has length 70 [2022-11-20 10:32:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:33,626 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 1243 transitions. [2022-11-20 10:32:33,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-20 10:32:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1243 transitions. [2022-11-20 10:32:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 10:32:33,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:33,636 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:33,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:33,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:33,842 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:32:33,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:33,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1086227410, now seen corresponding path program 1 times [2022-11-20 10:32:33,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:32:33,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535432839] [2022-11-20 10:32:33,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:33,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:32:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:34,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:32:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:34,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:32:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:34,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:32:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:34,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:32:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:34,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:32:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:34,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 10:32:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:34,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:32:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:35,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:32:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:35,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:32:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:35,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 10:32:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 10:32:35,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:32:35,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535432839] [2022-11-20 10:32:35,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535432839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:35,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409044860] [2022-11-20 10:32:35,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:35,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:35,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:32:35,183 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:32:35,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 10:32:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:35,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-20 10:32:35,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:38,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-20 10:32:38,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-20 10:32:38,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-20 10:32:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 10:32:38,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:39,401 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-11-20 10:32:39,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-11-20 10:32:39,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409044860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:39,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:32:39,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23] total 43 [2022-11-20 10:32:39,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151896701] [2022-11-20 10:32:39,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:39,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 10:32:39,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:32:39,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 10:32:39,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2512, Unknown=1, NotChecked=0, Total=2652 [2022-11-20 10:32:39,642 INFO L87 Difference]: Start difference. First operand 638 states and 1243 transitions. Second operand has 43 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 32 states have internal predecessors, (66), 15 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-20 10:32:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:47,781 INFO L93 Difference]: Finished difference Result 1102 states and 2489 transitions. [2022-11-20 10:32:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-20 10:32:47,782 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 32 states have internal predecessors, (66), 15 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) Word has length 71 [2022-11-20 10:32:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:47,798 INFO L225 Difference]: With dead ends: 1102 [2022-11-20 10:32:47,798 INFO L226 Difference]: Without dead ends: 1100 [2022-11-20 10:32:47,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3174 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1016, Invalid=13263, Unknown=1, NotChecked=0, Total=14280 [2022-11-20 10:32:47,802 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 240 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 3572 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 3951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 3572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:47,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 368 Invalid, 3951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 3572 Invalid, 0 Unknown, 200 Unchecked, 2.6s Time] [2022-11-20 10:32:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-11-20 10:32:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 740. [2022-11-20 10:32:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 553 states have (on average 1.213381555153707) internal successors, (671), 541 states have internal predecessors, (671), 86 states have call successors, (86), 63 states have call predecessors, (86), 100 states have return successors, (706), 135 states have call predecessors, (706), 44 states have call successors, (706) [2022-11-20 10:32:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1463 transitions. [2022-11-20 10:32:48,035 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1463 transitions. Word has length 71 [2022-11-20 10:32:48,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:48,037 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1463 transitions. [2022-11-20 10:32:48,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 32 states have internal predecessors, (66), 15 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-20 10:32:48,038 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1463 transitions. [2022-11-20 10:32:48,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-20 10:32:48,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:48,045 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:48,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:48,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 10:32:48,252 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:32:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash -700730293, now seen corresponding path program 4 times [2022-11-20 10:32:48,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:32:48,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980114642] [2022-11-20 10:32:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:48,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:32:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:49,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:32:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:49,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:32:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:49,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:32:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:49,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:32:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:49,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:32:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:49,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:32:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:49,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:32:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:49,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 10:32:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:49,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:32:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:49,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:32:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:49,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:32:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:49,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:32:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-20 10:32:49,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:32:49,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980114642] [2022-11-20 10:32:49,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980114642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:49,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752018387] [2022-11-20 10:32:49,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:32:49,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:32:49,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:32:49,975 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:32:50,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 10:32:50,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:32:50,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:50,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-20 10:32:50,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:50,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:32:51,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:32:51,279 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-11-20 10:32:51,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2022-11-20 10:32:51,292 INFO L321 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2022-11-20 10:32:51,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-11-20 10:32:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 10:32:51,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:04,054 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:33:14,249 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:33:14,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752018387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:33:14,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:33:14,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 33 [2022-11-20 10:33:14,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558072865] [2022-11-20 10:33:14,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:14,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 10:33:14,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:14,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 10:33:14,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1674, Unknown=1, NotChecked=0, Total=1806 [2022-11-20 10:33:14,252 INFO L87 Difference]: Start difference. First operand 740 states and 1463 transitions. Second operand has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 11 states have call successors, (20), 7 states have call predecessors, (20), 10 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-20 10:33:15,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:15,539 INFO L93 Difference]: Finished difference Result 1917 states and 4553 transitions. [2022-11-20 10:33:15,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 10:33:15,540 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 11 states have call successors, (20), 7 states have call predecessors, (20), 10 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) Word has length 86 [2022-11-20 10:33:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:15,570 INFO L225 Difference]: With dead ends: 1917 [2022-11-20 10:33:15,570 INFO L226 Difference]: Without dead ends: 1875 [2022-11-20 10:33:15,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=215, Invalid=3090, Unknown=1, NotChecked=0, Total=3306 [2022-11-20 10:33:15,574 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 49 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:15,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 669 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 566 Invalid, 0 Unknown, 302 Unchecked, 0.4s Time] [2022-11-20 10:33:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-11-20 10:33:15,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1521. [2022-11-20 10:33:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1143 states have (on average 1.2598425196850394) internal successors, (1440), 1127 states have internal predecessors, (1440), 115 states have call successors, (115), 86 states have call predecessors, (115), 262 states have return successors, (2485), 307 states have call predecessors, (2485), 73 states have call successors, (2485) [2022-11-20 10:33:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4040 transitions. [2022-11-20 10:33:15,934 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4040 transitions. Word has length 86 [2022-11-20 10:33:15,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:15,934 INFO L495 AbstractCegarLoop]: Abstraction has 1521 states and 4040 transitions. [2022-11-20 10:33:15,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 11 states have call successors, (20), 7 states have call predecessors, (20), 10 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-20 10:33:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4040 transitions. [2022-11-20 10:33:15,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-20 10:33:15,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:15,949 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:15,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:16,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 10:33:16,156 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:33:16,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:16,157 INFO L85 PathProgramCache]: Analyzing trace with hash 191480931, now seen corresponding path program 1 times [2022-11-20 10:33:16,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:16,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763397331] [2022-11-20 10:33:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:16,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:16,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:33:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:16,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:33:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:16,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:33:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:16,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:33:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:16,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:33:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:16,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 10:33:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:17,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:33:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:17,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:33:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:17,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:33:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:17,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-20 10:33:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 10:33:17,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:17,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763397331] [2022-11-20 10:33:17,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763397331] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:33:17,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280691780] [2022-11-20 10:33:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:17,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:33:17,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:33:17,473 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:33:17,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 10:33:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:17,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-20 10:33:17,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:17,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:33:17,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:33:18,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-20 10:33:18,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-20 10:33:19,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-20 10:33:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 10:33:19,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:20,539 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-11-20 10:33:20,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2022-11-20 10:33:21,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280691780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:33:21,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:33:21,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 51 [2022-11-20 10:33:21,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063344154] [2022-11-20 10:33:21,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:21,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 10:33:21,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:21,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 10:33:21,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4618, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 10:33:21,486 INFO L87 Difference]: Start difference. First operand 1521 states and 4040 transitions. Second operand has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-20 10:33:28,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:28,649 INFO L93 Difference]: Finished difference Result 1927 states and 6194 transitions. [2022-11-20 10:33:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-20 10:33:28,650 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 72 [2022-11-20 10:33:28,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:28,698 INFO L225 Difference]: With dead ends: 1927 [2022-11-20 10:33:28,698 INFO L226 Difference]: Without dead ends: 1925 [2022-11-20 10:33:28,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3422 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1095, Invalid=14405, Unknown=0, NotChecked=0, Total=15500 [2022-11-20 10:33:28,705 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 141 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 3325 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 3450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:28,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 349 Invalid, 3450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3325 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 10:33:28,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2022-11-20 10:33:29,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1514. [2022-11-20 10:33:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1138 states have (on average 1.2601054481546572) internal successors, (1434), 1123 states have internal predecessors, (1434), 113 states have call successors, (113), 86 states have call predecessors, (113), 262 states have return successors, (2457), 304 states have call predecessors, (2457), 71 states have call successors, (2457) [2022-11-20 10:33:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4004 transitions. [2022-11-20 10:33:29,190 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4004 transitions. Word has length 72 [2022-11-20 10:33:29,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:29,190 INFO L495 AbstractCegarLoop]: Abstraction has 1514 states and 4004 transitions. [2022-11-20 10:33:29,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-20 10:33:29,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4004 transitions. [2022-11-20 10:33:29,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-20 10:33:29,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:29,206 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:29,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:29,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 10:33:29,413 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:33:29,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:29,413 INFO L85 PathProgramCache]: Analyzing trace with hash -560347655, now seen corresponding path program 5 times [2022-11-20 10:33:29,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:29,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679156115] [2022-11-20 10:33:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:29,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:30,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:33:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:30,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:33:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:31,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:33:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:31,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:33:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:31,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:33:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:31,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:33:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:31,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:33:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:31,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 10:33:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:31,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:33:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:31,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:33:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:31,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:33:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:31,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:33:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:31,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:33:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:31,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:33:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 50 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-20 10:33:31,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:31,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679156115] [2022-11-20 10:33:31,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679156115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:33:31,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978468909] [2022-11-20 10:33:31,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:33:31,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:33:31,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:33:31,872 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:33:31,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 10:33:32,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-20 10:33:32,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:32,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-20 10:33:32,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:32,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:33:32,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:33:33,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:33:33,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 61 [2022-11-20 10:33:33,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:33:33,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-11-20 10:33:33,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-20 10:33:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-20 10:33:34,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:35,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:33:35,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 70 [2022-11-20 10:33:36,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:33:36,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 56 [2022-11-20 10:33:36,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978468909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:33:36,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:33:36,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 55 [2022-11-20 10:33:36,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797626839] [2022-11-20 10:33:36,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:36,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-20 10:33:36,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:33:36,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-20 10:33:36,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4500, Unknown=0, NotChecked=0, Total=4692 [2022-11-20 10:33:36,755 INFO L87 Difference]: Start difference. First operand 1514 states and 4004 transitions. Second operand has 55 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 40 states have internal predecessors, (85), 18 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (20), 16 states have call predecessors, (20), 12 states have call successors, (20) [2022-11-20 10:33:44,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:44,375 INFO L93 Difference]: Finished difference Result 2147 states and 6920 transitions. [2022-11-20 10:33:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-20 10:33:44,376 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 40 states have internal predecessors, (85), 18 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (20), 16 states have call predecessors, (20), 12 states have call successors, (20) Word has length 99 [2022-11-20 10:33:44,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:44,421 INFO L225 Difference]: With dead ends: 2147 [2022-11-20 10:33:44,422 INFO L226 Difference]: Without dead ends: 2145 [2022-11-20 10:33:44,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 129 SyntacticMatches, 3 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3026 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1086, Invalid=14414, Unknown=0, NotChecked=0, Total=15500 [2022-11-20 10:33:44,430 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 139 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 3136 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 3690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:44,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 433 Invalid, 3690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3136 Invalid, 0 Unknown, 472 Unchecked, 2.2s Time] [2022-11-20 10:33:44,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2022-11-20 10:33:44,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1685. [2022-11-20 10:33:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1254 states have (on average 1.2599681020733653) internal successors, (1580), 1274 states have internal predecessors, (1580), 113 states have call successors, (113), 86 states have call predecessors, (113), 317 states have return successors, (3329), 324 states have call predecessors, (3329), 71 states have call successors, (3329) [2022-11-20 10:33:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 5022 transitions. [2022-11-20 10:33:44,982 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 5022 transitions. Word has length 99 [2022-11-20 10:33:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:44,982 INFO L495 AbstractCegarLoop]: Abstraction has 1685 states and 5022 transitions. [2022-11-20 10:33:44,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 40 states have internal predecessors, (85), 18 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (20), 16 states have call predecessors, (20), 12 states have call successors, (20) [2022-11-20 10:33:44,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 5022 transitions. [2022-11-20 10:33:45,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-20 10:33:45,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:45,000 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:45,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:45,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:33:45,209 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:33:45,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:45,209 INFO L85 PathProgramCache]: Analyzing trace with hash -931803550, now seen corresponding path program 3 times [2022-11-20 10:33:45,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:33:45,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085506386] [2022-11-20 10:33:45,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:45,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:33:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:46,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:33:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:46,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:33:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:46,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:33:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:49,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:33:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:49,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:33:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:50,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:33:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:50,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:33:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:50,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 10:33:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:50,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:33:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:50,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:33:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:50,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:33:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:50,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 10:33:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:50,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:33:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:50,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:33:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:50,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:33:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:50,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:33:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:50,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:33:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:50,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:33:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 30 proven. 115 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-20 10:33:50,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:33:50,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085506386] [2022-11-20 10:33:50,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085506386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:33:50,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629727527] [2022-11-20 10:33:50,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:33:50,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:33:50,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:33:50,648 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:33:50,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 10:33:51,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 10:33:51,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:51,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-20 10:33:51,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:51,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:33:51,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 10:33:51,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 10:33:51,687 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base Int) (v_ArrVal_3240 (Array Int Int)) (v_ArrVal_3239 (Array Int Int))) (and (= (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_3240) |c_#memory_$Pointer$.base|) (= (select |c_old(#valid)| nondet_tree_~n~0.base) 0) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_3239)))) is different from true [2022-11-20 10:33:51,769 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base Int)) (and (= (select |c_old(#valid)| nondet_tree_~n~0.base) 0) (exists ((v_ArrVal_3240 (Array Int Int)) (v_ArrVal_3230 (Array Int Int)) (v_ArrVal_3241 (Array Int Int)) (v_ArrVal_3242 (Array Int Int)) (v_nondet_tree_~n~0.base_107 Int) (v_ArrVal_3239 (Array Int Int)) (v_ArrVal_3229 (Array Int Int))) (and (= (store (store (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_3229) v_nondet_tree_~n~0.base_107 v_ArrVal_3240) nondet_tree_~n~0.base v_ArrVal_3242) |c_#memory_$Pointer$.base|) (= (select (store |c_old(#valid)| nondet_tree_~n~0.base 1) v_nondet_tree_~n~0.base_107) 0) (= |c_#memory_$Pointer$.offset| (store (store (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_3230) v_nondet_tree_~n~0.base_107 v_ArrVal_3239) nondet_tree_~n~0.base v_ArrVal_3241)))))) is different from true [2022-11-20 10:33:51,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:51,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:51,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:51,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2022-11-20 10:33:51,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:51,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:51,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:33:51,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2022-11-20 10:33:51,824 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-20 10:33:51,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 10:33:51,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 10:33:51,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 10:34:16,384 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:34:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 108 proven. 101 refuted. 0 times theorem prover too weak. 118 trivial. 22 not checked. [2022-11-20 10:34:16,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:17,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629727527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:34:17,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:34:17,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 36 [2022-11-20 10:34:17,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674000167] [2022-11-20 10:34:17,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:17,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 10:34:17,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:34:17,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 10:34:17,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1266, Unknown=11, NotChecked=146, Total=1560 [2022-11-20 10:34:17,640 INFO L87 Difference]: Start difference. First operand 1685 states and 5022 transitions. Second operand has 36 states, 31 states have (on average 2.774193548387097) internal successors, (86), 28 states have internal predecessors, (86), 16 states have call successors, (30), 8 states have call predecessors, (30), 15 states have return successors, (24), 17 states have call predecessors, (24), 15 states have call successors, (24) [2022-11-20 10:34:51,908 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:35:08,036 WARN L233 SmtUtils]: Spent 12.08s on a formula simplification. DAG size of input: 62 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:35:26,138 WARN L233 SmtUtils]: Spent 12.05s on a formula simplification. DAG size of input: 41 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:35:38,204 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:35:38,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:38,347 INFO L93 Difference]: Finished difference Result 2275 states and 6293 transitions. [2022-11-20 10:35:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 10:35:38,348 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 2.774193548387097) internal successors, (86), 28 states have internal predecessors, (86), 16 states have call successors, (30), 8 states have call predecessors, (30), 15 states have return successors, (24), 17 states have call predecessors, (24), 15 states have call successors, (24) Word has length 121 [2022-11-20 10:35:38,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:38,384 INFO L225 Difference]: With dead ends: 2275 [2022-11-20 10:35:38,384 INFO L226 Difference]: Without dead ends: 2178 [2022-11-20 10:35:38,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 213 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 106.7s TimeCoverageRelationStatistics Valid=403, Invalid=3479, Unknown=32, NotChecked=246, Total=4160 [2022-11-20 10:35:38,389 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 99 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 487 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:38,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 319 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 343 Invalid, 0 Unknown, 487 Unchecked, 0.4s Time] [2022-11-20 10:35:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2022-11-20 10:35:38,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1792. [2022-11-20 10:35:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1332 states have (on average 1.2597597597597598) internal successors, (1678), 1344 states have internal predecessors, (1678), 127 states have call successors, (127), 99 states have call predecessors, (127), 332 states have return successors, (3100), 348 states have call predecessors, (3100), 85 states have call successors, (3100) [2022-11-20 10:35:38,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 4905 transitions. [2022-11-20 10:35:38,805 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 4905 transitions. Word has length 121 [2022-11-20 10:35:38,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:38,806 INFO L495 AbstractCegarLoop]: Abstraction has 1792 states and 4905 transitions. [2022-11-20 10:35:38,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 2.774193548387097) internal successors, (86), 28 states have internal predecessors, (86), 16 states have call successors, (30), 8 states have call predecessors, (30), 15 states have return successors, (24), 17 states have call predecessors, (24), 15 states have call successors, (24) [2022-11-20 10:35:38,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 4905 transitions. [2022-11-20 10:35:38,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 10:35:38,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:38,820 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:38,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:39,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:35:39,028 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:35:39,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:39,030 INFO L85 PathProgramCache]: Analyzing trace with hash 181678716, now seen corresponding path program 5 times [2022-11-20 10:35:39,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:39,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260209307] [2022-11-20 10:35:39,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:39,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:40,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:35:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:40,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:35:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:40,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:35:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:40,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:35:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:40,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:35:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:40,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 10:35:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:41,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:35:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:41,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:35:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:41,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:35:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:41,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 10:35:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 10:35:41,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:41,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260209307] [2022-11-20 10:35:41,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260209307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:35:41,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912654622] [2022-11-20 10:35:41,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:35:41,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:35:41,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:35:41,327 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:35:41,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 10:35:41,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 10:35:41,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:35:41,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-20 10:35:41,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:41,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:35:41,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:35:42,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:35:42,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 58 [2022-11-20 10:35:42,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:35:42,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 38 [2022-11-20 10:35:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 10:35:42,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:35:59,658 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:35:59,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912654622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:35:59,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:35:59,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 18] total 48 [2022-11-20 10:35:59,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832134919] [2022-11-20 10:35:59,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:35:59,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 10:35:59,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:59,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 10:35:59,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2590, Unknown=3, NotChecked=0, Total=2756 [2022-11-20 10:35:59,705 INFO L87 Difference]: Start difference. First operand 1792 states and 4905 transitions. Second operand has 48 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 37 states have internal predecessors, (84), 18 states have call successors, (22), 9 states have call predecessors, (22), 14 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-20 10:36:07,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:07,689 INFO L93 Difference]: Finished difference Result 7048 states and 43714 transitions. [2022-11-20 10:36:07,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-20 10:36:07,690 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 37 states have internal predecessors, (84), 18 states have call successors, (22), 9 states have call predecessors, (22), 14 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) Word has length 76 [2022-11-20 10:36:07,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:07,945 INFO L225 Difference]: With dead ends: 7048 [2022-11-20 10:36:07,945 INFO L226 Difference]: Without dead ends: 7035 [2022-11-20 10:36:07,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3455 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=1168, Invalid=12871, Unknown=3, NotChecked=0, Total=14042 [2022-11-20 10:36:07,962 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 243 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 4017 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 5152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 4017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 831 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:07,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 547 Invalid, 5152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 4017 Invalid, 0 Unknown, 831 Unchecked, 3.0s Time] [2022-11-20 10:36:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7035 states. [2022-11-20 10:36:10,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7035 to 4274. [2022-11-20 10:36:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4274 states, 3183 states have (on average 1.2723845428840717) internal successors, (4050), 3188 states have internal predecessors, (4050), 281 states have call successors, (281), 141 states have call predecessors, (281), 809 states have return successors, (16854), 944 states have call predecessors, (16854), 224 states have call successors, (16854) [2022-11-20 10:36:10,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4274 states to 4274 states and 21185 transitions. [2022-11-20 10:36:10,299 INFO L78 Accepts]: Start accepts. Automaton has 4274 states and 21185 transitions. Word has length 76 [2022-11-20 10:36:10,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:10,299 INFO L495 AbstractCegarLoop]: Abstraction has 4274 states and 21185 transitions. [2022-11-20 10:36:10,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 37 states have internal predecessors, (84), 18 states have call successors, (22), 9 states have call predecessors, (22), 14 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-20 10:36:10,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4274 states and 21185 transitions. [2022-11-20 10:36:10,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 10:36:10,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:10,332 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:10,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:10,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 10:36:10,540 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:36:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:10,540 INFO L85 PathProgramCache]: Analyzing trace with hash 298042362, now seen corresponding path program 2 times [2022-11-20 10:36:10,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:36:10,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029850675] [2022-11-20 10:36:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:10,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:36:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:11,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:36:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:11,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:36:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:11,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:36:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:11,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:36:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:12,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:36:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:12,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 10:36:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:12,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:36:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:12,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:36:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:12,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:36:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:12,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 10:36:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-20 10:36:12,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:36:12,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029850675] [2022-11-20 10:36:12,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029850675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:36:12,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839819510] [2022-11-20 10:36:12,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:36:12,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:36:12,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:36:12,085 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:36:12,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 10:36:12,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:36:12,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:36:12,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-20 10:36:12,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:12,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 10:36:12,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 10:36:12,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:36:13,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:36:13,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:36:13,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 33 [2022-11-20 10:36:13,899 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-11-20 10:36:13,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-11-20 10:36:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 39 proven. 33 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 10:36:13,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:36:24,723 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:36:34,914 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:36:34,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839819510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:36:34,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:36:34,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27] total 42 [2022-11-20 10:36:34,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481709218] [2022-11-20 10:36:34,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:36:34,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 10:36:34,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:36:34,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 10:36:34,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2479, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 10:36:34,917 INFO L87 Difference]: Start difference. First operand 4274 states and 21185 transitions. Second operand has 42 states, 35 states have (on average 2.2) internal successors, (77), 32 states have internal predecessors, (77), 15 states have call successors, (21), 9 states have call predecessors, (21), 13 states have return successors, (18), 14 states have call predecessors, (18), 12 states have call successors, (18) [2022-11-20 10:36:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:36:37,455 INFO L93 Difference]: Finished difference Result 5362 states and 33546 transitions. [2022-11-20 10:36:37,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 10:36:37,456 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 2.2) internal successors, (77), 32 states have internal predecessors, (77), 15 states have call successors, (21), 9 states have call predecessors, (21), 13 states have return successors, (18), 14 states have call predecessors, (18), 12 states have call successors, (18) Word has length 76 [2022-11-20 10:36:37,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:36:37,664 INFO L225 Difference]: With dead ends: 5362 [2022-11-20 10:36:37,665 INFO L226 Difference]: Without dead ends: 5249 [2022-11-20 10:36:37,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=457, Invalid=6515, Unknown=0, NotChecked=0, Total=6972 [2022-11-20 10:36:37,680 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 105 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:36:37,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 544 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 653 Invalid, 0 Unknown, 270 Unchecked, 0.4s Time] [2022-11-20 10:36:37,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5249 states. [2022-11-20 10:36:39,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5249 to 4790. [2022-11-20 10:36:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4790 states, 3558 states have (on average 1.273468240584598) internal successors, (4531), 3542 states have internal predecessors, (4531), 332 states have call successors, (332), 164 states have call predecessors, (332), 899 states have return successors, (23958), 1083 states have call predecessors, (23958), 273 states have call successors, (23958) [2022-11-20 10:36:39,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4790 states to 4790 states and 28821 transitions. [2022-11-20 10:36:39,367 INFO L78 Accepts]: Start accepts. Automaton has 4790 states and 28821 transitions. Word has length 76 [2022-11-20 10:36:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:36:39,368 INFO L495 AbstractCegarLoop]: Abstraction has 4790 states and 28821 transitions. [2022-11-20 10:36:39,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 2.2) internal successors, (77), 32 states have internal predecessors, (77), 15 states have call successors, (21), 9 states have call predecessors, (21), 13 states have return successors, (18), 14 states have call predecessors, (18), 12 states have call successors, (18) [2022-11-20 10:36:39,368 INFO L276 IsEmpty]: Start isEmpty. Operand 4790 states and 28821 transitions. [2022-11-20 10:36:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-20 10:36:39,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:36:39,410 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:36:39,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 10:36:39,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:36:39,618 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:36:39,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:36:39,618 INFO L85 PathProgramCache]: Analyzing trace with hash -285986040, now seen corresponding path program 4 times [2022-11-20 10:36:39,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:36:39,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479343056] [2022-11-20 10:36:39,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:36:39,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:36:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:41,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:36:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:41,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:36:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:41,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:36:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:41,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:36:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:41,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:36:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:41,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:36:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:41,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:36:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:41,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 10:36:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:42,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:36:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:42,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:36:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:42,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:36:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:42,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:36:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:42,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:36:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:42,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:36:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:36:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 46 proven. 82 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 10:36:42,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:36:42,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479343056] [2022-11-20 10:36:42,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479343056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:36:42,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198812060] [2022-11-20 10:36:42,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:36:42,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:36:42,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:36:42,956 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:36:42,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 10:36:43,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:36:43,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:36:43,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 132 conjunts are in the unsatisfiable core [2022-11-20 10:36:43,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:36:43,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:36:43,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:36:46,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:36:46,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:36:46,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 47 [2022-11-20 10:36:46,846 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-20 10:36:46,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 29 [2022-11-20 10:36:47,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:36:47,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-11-20 10:36:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 48 proven. 62 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-20 10:36:47,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:36:50,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198812060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:36:50,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:36:50,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 38] total 75 [2022-11-20 10:36:50,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801022634] [2022-11-20 10:36:50,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:36:50,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-20 10:36:50,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:36:50,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-20 10:36:50,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=8971, Unknown=0, NotChecked=0, Total=9312 [2022-11-20 10:36:50,896 INFO L87 Difference]: Start difference. First operand 4790 states and 28821 transitions. Second operand has 75 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 54 states have internal predecessors, (104), 23 states have call successors, (32), 9 states have call predecessors, (32), 16 states have return successors, (25), 22 states have call predecessors, (25), 17 states have call successors, (25) [2022-11-20 10:37:10,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:10,432 INFO L93 Difference]: Finished difference Result 15586 states and 121880 transitions. [2022-11-20 10:37:10,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-11-20 10:37:10,433 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 54 states have internal predecessors, (104), 23 states have call successors, (32), 9 states have call predecessors, (32), 16 states have return successors, (25), 22 states have call predecessors, (25), 17 states have call successors, (25) Word has length 100 [2022-11-20 10:37:10,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:11,564 INFO L225 Difference]: With dead ends: 15586 [2022-11-20 10:37:11,565 INFO L226 Difference]: Without dead ends: 15584 [2022-11-20 10:37:11,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12599 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=2038, Invalid=45704, Unknown=0, NotChecked=0, Total=47742 [2022-11-20 10:37:11,602 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 126 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 2939 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 5477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2477 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:11,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 672 Invalid, 5477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2939 Invalid, 0 Unknown, 2477 Unchecked, 2.4s Time] [2022-11-20 10:37:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15584 states. [2022-11-20 10:37:21,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15584 to 10695. [2022-11-20 10:37:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10695 states, 8084 states have (on average 1.2952746165264721) internal successors, (10471), 7826 states have internal predecessors, (10471), 561 states have call successors, (561), 221 states have call predecessors, (561), 2049 states have return successors, (83619), 2647 states have call predecessors, (83619), 502 states have call successors, (83619) [2022-11-20 10:37:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10695 states to 10695 states and 94651 transitions. [2022-11-20 10:37:22,308 INFO L78 Accepts]: Start accepts. Automaton has 10695 states and 94651 transitions. Word has length 100 [2022-11-20 10:37:22,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:22,309 INFO L495 AbstractCegarLoop]: Abstraction has 10695 states and 94651 transitions. [2022-11-20 10:37:22,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 54 states have internal predecessors, (104), 23 states have call successors, (32), 9 states have call predecessors, (32), 16 states have return successors, (25), 22 states have call predecessors, (25), 17 states have call successors, (25) [2022-11-20 10:37:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 10695 states and 94651 transitions. [2022-11-20 10:37:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-20 10:37:22,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:22,369 INFO L195 NwaCegarLoop]: trace histogram [15, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:37:22,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 10:37:22,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:37:22,576 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:37:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:22,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1798801897, now seen corresponding path program 5 times [2022-11-20 10:37:22,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:37:22,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830577995] [2022-11-20 10:37:22,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:37:22,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:37:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:37:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:37:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:37:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:37:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:37:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:37:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:37:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:37:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:37:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:37:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:37:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:37:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:37:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:37:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 10:37:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:24,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-20 10:37:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:25,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:37:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:25,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:37:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:25,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:37:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:25,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-20 10:37:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:25,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:37:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:25,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:37:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:25,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:37:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:25,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:37:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 119 proven. 52 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-11-20 10:37:25,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:37:25,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830577995] [2022-11-20 10:37:25,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830577995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:37:25,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916932290] [2022-11-20 10:37:25,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:37:25,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:37:25,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:37:25,469 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:37:25,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 10:37:33,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-20 10:37:33,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:37:33,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-20 10:37:33,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:37:34,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-20 10:37:34,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-20 10:37:34,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-20 10:37:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2022-11-20 10:37:34,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:37:36,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:37:36,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2022-11-20 10:37:37,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916932290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:37:37,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:37:37,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 53 [2022-11-20 10:37:37,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318907140] [2022-11-20 10:37:37,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:37:37,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 10:37:37,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:37:37,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 10:37:37,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4486, Unknown=0, NotChecked=0, Total=4692 [2022-11-20 10:37:37,506 INFO L87 Difference]: Start difference. First operand 10695 states and 94651 transitions. Second operand has 53 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 38 states have internal predecessors, (83), 16 states have call successors, (27), 6 states have call predecessors, (27), 9 states have return successors, (21), 16 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-20 10:37:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:47,066 INFO L93 Difference]: Finished difference Result 13947 states and 139740 transitions. [2022-11-20 10:37:47,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-20 10:37:47,067 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 38 states have internal predecessors, (83), 16 states have call successors, (27), 6 states have call predecessors, (27), 9 states have return successors, (21), 16 states have call predecessors, (21), 12 states have call successors, (21) Word has length 149 [2022-11-20 10:37:47,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:48,344 INFO L225 Difference]: With dead ends: 13947 [2022-11-20 10:37:48,344 INFO L226 Difference]: Without dead ends: 13937 [2022-11-20 10:37:48,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2983 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1061, Invalid=13701, Unknown=0, NotChecked=0, Total=14762 [2022-11-20 10:37:48,366 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 166 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 4432 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 4502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 4432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:48,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 388 Invalid, 4502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 4432 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 10:37:48,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13937 states. [2022-11-20 10:38:04,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13937 to 11051. [2022-11-20 10:38:04,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11051 states, 8342 states have (on average 1.291656677055862) internal successors, (10775), 8150 states have internal predecessors, (10775), 538 states have call successors, (538), 200 states have call predecessors, (538), 2170 states have return successors, (93252), 2700 states have call predecessors, (93252), 502 states have call successors, (93252) [2022-11-20 10:38:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11051 states to 11051 states and 104565 transitions. [2022-11-20 10:38:05,583 INFO L78 Accepts]: Start accepts. Automaton has 11051 states and 104565 transitions. Word has length 149 [2022-11-20 10:38:05,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:05,585 INFO L495 AbstractCegarLoop]: Abstraction has 11051 states and 104565 transitions. [2022-11-20 10:38:05,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 38 states have internal predecessors, (83), 16 states have call successors, (27), 6 states have call predecessors, (27), 9 states have return successors, (21), 16 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-20 10:38:05,585 INFO L276 IsEmpty]: Start isEmpty. Operand 11051 states and 104565 transitions. [2022-11-20 10:38:05,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-20 10:38:05,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:05,646 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:05,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:05,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 10:38:05,860 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:38:05,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:05,860 INFO L85 PathProgramCache]: Analyzing trace with hash 39633961, now seen corresponding path program 6 times [2022-11-20 10:38:05,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:05,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851333490] [2022-11-20 10:38:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:05,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:08,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:09,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:38:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:09,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:38:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:10,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:38:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:10,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:38:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:10,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:38:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:10,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:38:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:10,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 10:38:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:11,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:11,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:38:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:11,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:11,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:38:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:11,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:38:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:11,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:38:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 28 proven. 101 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 10:38:11,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:11,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851333490] [2022-11-20 10:38:11,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851333490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:11,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217312385] [2022-11-20 10:38:11,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:38:11,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:11,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:11,791 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:11,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 10:38:12,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-20 10:38:12,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:12,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 149 conjunts are in the unsatisfiable core [2022-11-20 10:38:12,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:12,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:38:12,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:38:12,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:38:12,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 10:38:16,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:38:16,451 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 10:38:16,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 56 [2022-11-20 10:38:16,458 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-20 10:38:16,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 34 [2022-11-20 10:38:16,898 INFO L321 Elim1Store]: treesize reduction 7, result has 78.8 percent of original size [2022-11-20 10:38:16,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 47 [2022-11-20 10:38:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 44 proven. 65 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 10:38:16,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:20,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217312385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:20,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:20,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37] total 75 [2022-11-20 10:38:20,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67351962] [2022-11-20 10:38:20,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:20,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-20 10:38:20,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:20,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-20 10:38:20,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=8181, Unknown=0, NotChecked=0, Total=8556 [2022-11-20 10:38:20,497 INFO L87 Difference]: Start difference. First operand 11051 states and 104565 transitions. Second operand has 75 states, 60 states have (on average 1.8) internal successors, (108), 57 states have internal predecessors, (108), 25 states have call successors, (32), 9 states have call predecessors, (32), 17 states have return successors, (27), 24 states have call predecessors, (27), 19 states have call successors, (27) [2022-11-20 10:38:43,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:43,156 INFO L93 Difference]: Finished difference Result 30340 states and 358130 transitions. [2022-11-20 10:38:43,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-11-20 10:38:43,157 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 60 states have (on average 1.8) internal successors, (108), 57 states have internal predecessors, (108), 25 states have call successors, (32), 9 states have call predecessors, (32), 17 states have return successors, (27), 24 states have call predecessors, (27), 19 states have call successors, (27) Word has length 101 [2022-11-20 10:38:43,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:46,159 INFO L225 Difference]: With dead ends: 30340 [2022-11-20 10:38:46,160 INFO L226 Difference]: Without dead ends: 30338 [2022-11-20 10:38:46,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12411 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=2305, Invalid=43235, Unknown=42, NotChecked=0, Total=45582 [2022-11-20 10:38:46,223 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 141 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 3269 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 5549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2198 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:46,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 625 Invalid, 5549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3269 Invalid, 0 Unknown, 2198 Unchecked, 3.2s Time] [2022-11-20 10:38:46,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30338 states. [2022-11-20 10:39:21,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30338 to 17147. [2022-11-20 10:39:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17147 states, 12898 states have (on average 1.2877190262056133) internal successors, (16609), 12660 states have internal predecessors, (16609), 900 states have call successors, (900), 322 states have call predecessors, (900), 3348 states have return successors, (208320), 4164 states have call predecessors, (208320), 864 states have call successors, (208320) [2022-11-20 10:39:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17147 states to 17147 states and 225829 transitions. [2022-11-20 10:39:22,813 INFO L78 Accepts]: Start accepts. Automaton has 17147 states and 225829 transitions. Word has length 101 [2022-11-20 10:39:22,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:22,814 INFO L495 AbstractCegarLoop]: Abstraction has 17147 states and 225829 transitions. [2022-11-20 10:39:22,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 60 states have (on average 1.8) internal successors, (108), 57 states have internal predecessors, (108), 25 states have call successors, (32), 9 states have call predecessors, (32), 17 states have return successors, (27), 24 states have call predecessors, (27), 19 states have call successors, (27) [2022-11-20 10:39:22,814 INFO L276 IsEmpty]: Start isEmpty. Operand 17147 states and 225829 transitions. [2022-11-20 10:39:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 10:39:22,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:22,880 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:22,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-20 10:39:23,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 10:39:23,088 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:39:23,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:23,089 INFO L85 PathProgramCache]: Analyzing trace with hash -888263464, now seen corresponding path program 2 times [2022-11-20 10:39:23,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:23,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683724876] [2022-11-20 10:39:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:23,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:24,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:39:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:24,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:39:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:24,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:39:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:25,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:39:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:25,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:39:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:25,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 10:39:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:25,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 10:39:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:25,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 10:39:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:25,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:39:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:25,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:39:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:26,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:39:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:26,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:39:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:26,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:39:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:26,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 10:39:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 41 proven. 86 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-20 10:39:26,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:26,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683724876] [2022-11-20 10:39:26,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683724876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:26,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392397577] [2022-11-20 10:39:26,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:39:26,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:26,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:26,802 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:26,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac025d95-df1a-460a-bd3c-aadff410af85/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process