./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mlceu.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mlceu.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 09:06:21,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 09:06:21,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 09:06:21,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 09:06:21,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 09:06:21,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 09:06:21,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 09:06:21,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 09:06:21,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 09:06:21,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 09:06:21,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 09:06:21,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 09:06:21,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 09:06:21,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 09:06:21,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 09:06:21,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 09:06:21,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 09:06:21,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 09:06:21,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 09:06:21,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 09:06:21,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 09:06:21,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 09:06:21,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 09:06:21,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 09:06:21,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 09:06:21,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 09:06:21,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 09:06:21,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 09:06:21,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 09:06:21,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 09:06:21,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 09:06:21,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 09:06:21,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 09:06:21,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 09:06:21,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 09:06:21,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 09:06:21,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 09:06:21,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 09:06:21,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 09:06:21,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 09:06:21,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 09:06:21,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 09:06:21,529 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 09:06:21,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 09:06:21,530 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 09:06:21,530 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 09:06:21,531 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 09:06:21,531 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 09:06:21,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 09:06:21,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 09:06:21,532 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 09:06:21,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 09:06:21,533 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 09:06:21,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 09:06:21,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 09:06:21,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 09:06:21,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 09:06:21,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 09:06:21,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 09:06:21,535 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 09:06:21,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 09:06:21,535 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 09:06:21,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 09:06:21,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 09:06:21,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 09:06:21,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 09:06:21,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:06:21,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 09:06:21,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 09:06:21,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 09:06:21,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 09:06:21,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 09:06:21,538 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 09:06:21,538 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 09:06:21,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 09:06:21,538 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_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 [2022-11-21 09:06:21,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 09:06:21,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 09:06:21,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 09:06:21,797 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 09:06:21,798 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 09:06:21,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/array-tiling/mlceu.c [2022-11-21 09:06:25,082 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 09:06:25,312 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 09:06:25,312 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/sv-benchmarks/c/array-tiling/mlceu.c [2022-11-21 09:06:25,320 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/data/ee8885a37/32cd8ac5a3884303963397ecbe6a6474/FLAG45f9ffee5 [2022-11-21 09:06:25,345 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/data/ee8885a37/32cd8ac5a3884303963397ecbe6a6474 [2022-11-21 09:06:25,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 09:06:25,355 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 09:06:25,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 09:06:25,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 09:06:25,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 09:06:25,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:06:25" (1/1) ... [2022-11-21 09:06:25,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a581bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:25, skipping insertion in model container [2022-11-21 09:06:25,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:06:25" (1/1) ... [2022-11-21 09:06:25,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 09:06:25,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 09:06:25,539 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_8a5ebc38-4431-4540-aa5c-6572ac605e94/sv-benchmarks/c/array-tiling/mlceu.c[396,409] [2022-11-21 09:06:25,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:06:25,567 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 09:06:25,580 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_8a5ebc38-4431-4540-aa5c-6572ac605e94/sv-benchmarks/c/array-tiling/mlceu.c[396,409] [2022-11-21 09:06:25,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:06:25,600 INFO L208 MainTranslator]: Completed translation [2022-11-21 09:06:25,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:25 WrapperNode [2022-11-21 09:06:25,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 09:06:25,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 09:06:25,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 09:06:25,602 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 09:06:25,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:25" (1/1) ... [2022-11-21 09:06:25,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:25" (1/1) ... [2022-11-21 09:06:25,629 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2022-11-21 09:06:25,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 09:06:25,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 09:06:25,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 09:06:25,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 09:06:25,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:25" (1/1) ... [2022-11-21 09:06:25,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:25" (1/1) ... [2022-11-21 09:06:25,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:25" (1/1) ... [2022-11-21 09:06:25,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:25" (1/1) ... [2022-11-21 09:06:25,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:25" (1/1) ... [2022-11-21 09:06:25,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:25" (1/1) ... [2022-11-21 09:06:25,653 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:25" (1/1) ... [2022-11-21 09:06:25,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:25" (1/1) ... [2022-11-21 09:06:25,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 09:06:25,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 09:06:25,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 09:06:25,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 09:06:25,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:25" (1/1) ... [2022-11-21 09:06:25,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:06:25,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:25,704 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 09:06:25,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 09:06:25,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 09:06:25,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 09:06:25,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 09:06:25,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 09:06:25,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 09:06:25,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 09:06:25,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 09:06:25,845 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 09:06:25,848 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 09:06:26,076 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 09:06:26,082 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 09:06:26,082 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 09:06:26,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:06:26 BoogieIcfgContainer [2022-11-21 09:06:26,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 09:06:26,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 09:06:26,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 09:06:26,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 09:06:26,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:06:25" (1/3) ... [2022-11-21 09:06:26,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d639018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:06:26, skipping insertion in model container [2022-11-21 09:06:26,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:06:25" (2/3) ... [2022-11-21 09:06:26,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d639018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:06:26, skipping insertion in model container [2022-11-21 09:06:26,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:06:26" (3/3) ... [2022-11-21 09:06:26,094 INFO L112 eAbstractionObserver]: Analyzing ICFG mlceu.c [2022-11-21 09:06:26,115 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 09:06:26,115 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 09:06:26,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 09:06:26,203 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;@44e6da49, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 09:06:26,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 09:06:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 09:06:26,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:26,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:26,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:26,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:26,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1096717866, now seen corresponding path program 1 times [2022-11-21 09:06:26,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:26,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932993453] [2022-11-21 09:06:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:26,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:26,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:26,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932993453] [2022-11-21 09:06:26,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932993453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:26,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:06:26,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 09:06:26,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877212115] [2022-11-21 09:06:26,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:26,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 09:06:26,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:26,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 09:06:26,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 09:06:26,468 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:26,485 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-11-21 09:06:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 09:06:26,488 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-21 09:06:26,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:26,503 INFO L225 Difference]: With dead ends: 34 [2022-11-21 09:06:26,504 INFO L226 Difference]: Without dead ends: 15 [2022-11-21 09:06:26,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 09:06:26,517 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:26,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 09:06:26,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-21 09:06:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-21 09:06:26,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:26,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-21 09:06:26,571 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2022-11-21 09:06:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:26,572 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-21 09:06:26,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-21 09:06:26,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 09:06:26,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:26,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:26,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 09:06:26,574 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:26,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:26,575 INFO L85 PathProgramCache]: Analyzing trace with hash 678289496, now seen corresponding path program 1 times [2022-11-21 09:06:26,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:26,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081058251] [2022-11-21 09:06:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:26,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:26,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:26,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081058251] [2022-11-21 09:06:26,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081058251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:06:26,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:06:26,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 09:06:26,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073611821] [2022-11-21 09:06:26,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:06:26,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 09:06:26,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:26,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 09:06:26,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 09:06:26,744 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:26,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:26,825 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-11-21 09:06:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 09:06:26,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-21 09:06:26,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:26,827 INFO L225 Difference]: With dead ends: 34 [2022-11-21 09:06:26,828 INFO L226 Difference]: Without dead ends: 24 [2022-11-21 09:06:26,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 09:06:26,830 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:26,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 15 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:06:26,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-21 09:06:26,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2022-11-21 09:06:26,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-11-21 09:06:26,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2022-11-21 09:06:26,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:26,841 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-11-21 09:06:26,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-11-21 09:06:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 09:06:26,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:26,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:26,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 09:06:26,846 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:26,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1190752748, now seen corresponding path program 1 times [2022-11-21 09:06:26,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:26,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518158674] [2022-11-21 09:06:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:26,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:27,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:27,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518158674] [2022-11-21 09:06:27,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518158674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:27,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070477465] [2022-11-21 09:06:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:27,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:27,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:27,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:27,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 09:06:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:27,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 09:06:27,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:27,603 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 [2022-11-21 09:06:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:27,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:27,732 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 14 treesize of output 12 [2022-11-21 09:06:27,737 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 18 treesize of output 16 [2022-11-21 09:06:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:27,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070477465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:27,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:27,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-21 09:06:27,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374791544] [2022-11-21 09:06:27,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:27,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 09:06:27,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:27,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 09:06:27,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-21 09:06:27,763 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:27,948 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-11-21 09:06:27,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 09:06:27,950 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-21 09:06:27,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:27,951 INFO L225 Difference]: With dead ends: 26 [2022-11-21 09:06:27,953 INFO L226 Difference]: Without dead ends: 24 [2022-11-21 09:06:27,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:06:27,957 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:27,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 46 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:06:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-21 09:06:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2022-11-21 09:06:27,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:27,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-21 09:06:27,970 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2022-11-21 09:06:27,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:27,971 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-21 09:06:27,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:27,972 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-21 09:06:27,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 09:06:27,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:27,973 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:27,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:28,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:28,179 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:28,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1891500962, now seen corresponding path program 1 times [2022-11-21 09:06:28,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:28,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241241487] [2022-11-21 09:06:28,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:28,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:28,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:28,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241241487] [2022-11-21 09:06:28,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241241487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:28,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94681549] [2022-11-21 09:06:28,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:28,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:28,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:28,297 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:28,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 09:06:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:28,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 09:06:28,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:28,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:28,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94681549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:28,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:28,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-21 09:06:28,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851436390] [2022-11-21 09:06:28,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:28,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 09:06:28,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:28,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 09:06:28,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-21 09:06:28,550 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:28,653 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-11-21 09:06:28,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 09:06:28,653 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-21 09:06:28,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:28,654 INFO L225 Difference]: With dead ends: 49 [2022-11-21 09:06:28,654 INFO L226 Difference]: Without dead ends: 31 [2022-11-21 09:06:28,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-21 09:06:28,656 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:28,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 45 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:06:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-21 09:06:28,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2022-11-21 09:06:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:28,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-11-21 09:06:28,663 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2022-11-21 09:06:28,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:28,664 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-11-21 09:06:28,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:28,664 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-11-21 09:06:28,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 09:06:28,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:28,665 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:28,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:28,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:28,866 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:28,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:28,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2006236274, now seen corresponding path program 2 times [2022-11-21 09:06:28,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:28,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940443959] [2022-11-21 09:06:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:28,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:29,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:29,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940443959] [2022-11-21 09:06:29,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940443959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:29,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619929571] [2022-11-21 09:06:29,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:06:29,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:29,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:29,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:29,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 09:06:29,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:06:29,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:29,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-21 09:06:29,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:29,358 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 19 treesize of output 15 [2022-11-21 09:06:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:29,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:29,559 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 16 treesize of output 14 [2022-11-21 09:06:29,564 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 20 treesize of output 16 [2022-11-21 09:06:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:29,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619929571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:29,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:29,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-11-21 09:06:29,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944172167] [2022-11-21 09:06:29,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:29,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 09:06:29,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 09:06:29,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-11-21 09:06:29,613 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:29,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:29,995 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-11-21 09:06:29,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 09:06:29,995 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-21 09:06:29,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:29,996 INFO L225 Difference]: With dead ends: 33 [2022-11-21 09:06:29,996 INFO L226 Difference]: Without dead ends: 31 [2022-11-21 09:06:29,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2022-11-21 09:06:29,997 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:29,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 60 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:06:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-21 09:06:30,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2022-11-21 09:06:30,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-11-21 09:06:30,004 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2022-11-21 09:06:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:30,004 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-11-21 09:06:30,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-11-21 09:06:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 09:06:30,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:30,005 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:30,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-21 09:06:30,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:30,210 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:30,211 INFO L85 PathProgramCache]: Analyzing trace with hash 466236484, now seen corresponding path program 3 times [2022-11-21 09:06:30,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:30,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051160586] [2022-11-21 09:06:30,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:30,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:30,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:30,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051160586] [2022-11-21 09:06:30,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051160586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:30,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629716716] [2022-11-21 09:06:30,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:06:30,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:30,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:30,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:30,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 09:06:30,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 09:06:30,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:30,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 09:06:30,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:30,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:30,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629716716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:30,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:30,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-21 09:06:30,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525131415] [2022-11-21 09:06:30,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:30,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:06:30,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:30,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:06:30,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:06:30,597 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:30,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:30,710 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-11-21 09:06:30,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 09:06:30,710 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-21 09:06:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:30,713 INFO L225 Difference]: With dead ends: 64 [2022-11-21 09:06:30,713 INFO L226 Difference]: Without dead ends: 38 [2022-11-21 09:06:30,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-21 09:06:30,716 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:30,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 55 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:06:30,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-21 09:06:30,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-11-21 09:06:30,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-21 09:06:30,723 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2022-11-21 09:06:30,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:30,724 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-21 09:06:30,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:30,724 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-21 09:06:30,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 09:06:30,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:30,725 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:30,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-21 09:06:30,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 09:06:30,926 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:30,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:30,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1524796712, now seen corresponding path program 4 times [2022-11-21 09:06:30,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:30,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270523648] [2022-11-21 09:06:30,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:30,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:31,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:31,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270523648] [2022-11-21 09:06:31,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270523648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:31,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401867384] [2022-11-21 09:06:31,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 09:06:31,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:31,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:31,417 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:31,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 09:06:31,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 09:06:31,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:31,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-21 09:06:31,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:31,565 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 [2022-11-21 09:06:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:31,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:31,838 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 16 treesize of output 14 [2022-11-21 09:06:31,842 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 20 treesize of output 16 [2022-11-21 09:06:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:31,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401867384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:31,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:31,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2022-11-21 09:06:31,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492188718] [2022-11-21 09:06:31,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:31,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 09:06:31,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:31,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 09:06:31,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-21 09:06:31,873 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:32,265 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-11-21 09:06:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 09:06:32,265 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-21 09:06:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:32,265 INFO L225 Difference]: With dead ends: 40 [2022-11-21 09:06:32,266 INFO L226 Difference]: Without dead ends: 38 [2022-11-21 09:06:32,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-11-21 09:06:32,267 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:32,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 100 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 09:06:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-21 09:06:32,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-11-21 09:06:32,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:32,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-11-21 09:06:32,274 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2022-11-21 09:06:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:32,275 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-11-21 09:06:32,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:32,275 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-11-21 09:06:32,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-21 09:06:32,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:32,276 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:32,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-21 09:06:32,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:32,482 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:32,482 INFO L85 PathProgramCache]: Analyzing trace with hash 702525070, now seen corresponding path program 5 times [2022-11-21 09:06:32,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:32,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2454664] [2022-11-21 09:06:32,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:32,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:32,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:32,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2454664] [2022-11-21 09:06:32,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2454664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:32,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094121999] [2022-11-21 09:06:32,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 09:06:32,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:32,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:32,622 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:32,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 09:06:32,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-21 09:06:32,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:32,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 09:06:32,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:32,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:32,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094121999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:32,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:32,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-21 09:06:32,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466049858] [2022-11-21 09:06:32,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:32,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 09:06:32,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:32,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 09:06:32,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-21 09:06:32,970 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:33,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:33,096 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-11-21 09:06:33,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 09:06:33,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-21 09:06:33,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:33,099 INFO L225 Difference]: With dead ends: 79 [2022-11-21 09:06:33,100 INFO L226 Difference]: Without dead ends: 45 [2022-11-21 09:06:33,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-11-21 09:06:33,102 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:33,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 58 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:06:33,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-21 09:06:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-11-21 09:06:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-11-21 09:06:33,118 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2022-11-21 09:06:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:33,119 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-11-21 09:06:33,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-11-21 09:06:33,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-21 09:06:33,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:33,120 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:33,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:33,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:33,337 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:33,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:33,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1539792518, now seen corresponding path program 6 times [2022-11-21 09:06:33,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:33,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408984250] [2022-11-21 09:06:33,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:33,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:33,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:33,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408984250] [2022-11-21 09:06:33,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408984250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:33,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937434734] [2022-11-21 09:06:33,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 09:06:33,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:33,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:33,871 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:33,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 09:06:33,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-21 09:06:33,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:33,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 09:06:33,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:34,222 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 15 treesize of output 11 [2022-11-21 09:06:34,886 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-21 09:06:34,887 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 44 treesize of output 23 [2022-11-21 09:06:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:34,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:35,379 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 18 treesize of output 16 [2022-11-21 09:06:35,384 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 26 treesize of output 20 [2022-11-21 09:06:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:35,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937434734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:35,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:35,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 14] total 37 [2022-11-21 09:06:35,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910850764] [2022-11-21 09:06:35,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:35,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-21 09:06:35,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:35,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-21 09:06:35,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 09:06:35,610 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:40,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:40,389 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2022-11-21 09:06:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-21 09:06:40,390 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-21 09:06:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:40,390 INFO L225 Difference]: With dead ends: 117 [2022-11-21 09:06:40,390 INFO L226 Difference]: Without dead ends: 54 [2022-11-21 09:06:40,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1309, Invalid=6001, Unknown=0, NotChecked=0, Total=7310 [2022-11-21 09:06:40,394 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 489 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:40,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 154 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 09:06:40,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-21 09:06:40,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2022-11-21 09:06:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-11-21 09:06:40,406 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 34 [2022-11-21 09:06:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:40,406 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-11-21 09:06:40,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:40,407 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-11-21 09:06:40,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-21 09:06:40,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:40,408 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:40,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:40,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:40,613 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:40,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:40,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1393226030, now seen corresponding path program 1 times [2022-11-21 09:06:40,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:40,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180179097] [2022-11-21 09:06:40,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:40,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-21 09:06:40,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:40,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180179097] [2022-11-21 09:06:40,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180179097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:40,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571404670] [2022-11-21 09:06:40,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:40,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:40,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:40,763 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:40,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 09:06:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:40,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 09:06:40,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-21 09:06:40,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-21 09:06:40,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571404670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:40,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:40,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-11-21 09:06:40,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916484249] [2022-11-21 09:06:40,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:40,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 09:06:40,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:40,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 09:06:40,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-11-21 09:06:40,985 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:41,126 INFO L93 Difference]: Finished difference Result 145 states and 162 transitions. [2022-11-21 09:06:41,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:06:41,127 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-21 09:06:41,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:41,129 INFO L225 Difference]: With dead ends: 145 [2022-11-21 09:06:41,129 INFO L226 Difference]: Without dead ends: 121 [2022-11-21 09:06:41,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-11-21 09:06:41,130 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 131 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:41,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 64 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 09:06:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-21 09:06:41,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 64. [2022-11-21 09:06:41,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:41,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-11-21 09:06:41,143 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 44 [2022-11-21 09:06:41,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:41,143 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-11-21 09:06:41,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:41,144 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-11-21 09:06:41,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-21 09:06:41,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:41,145 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:41,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:41,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 09:06:41,351 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:41,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:41,351 INFO L85 PathProgramCache]: Analyzing trace with hash -412212304, now seen corresponding path program 7 times [2022-11-21 09:06:41,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:41,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277478740] [2022-11-21 09:06:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:41,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:41,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:41,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277478740] [2022-11-21 09:06:41,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277478740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:41,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746276626] [2022-11-21 09:06:41,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 09:06:41,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:41,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:41,989 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:42,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 09:06:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:42,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-21 09:06:42,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:42,242 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 15 treesize of output 11 [2022-11-21 09:06:42,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:06:42,320 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 25 treesize of output 24 [2022-11-21 09:06:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:42,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:42,768 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 16 treesize of output 14 [2022-11-21 09:06:42,771 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 20 treesize of output 16 [2022-11-21 09:06:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:42,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746276626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:42,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:42,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2022-11-21 09:06:42,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742098755] [2022-11-21 09:06:42,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:42,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-21 09:06:42,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:42,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-21 09:06:42,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-11-21 09:06:42,828 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:43,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:43,377 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2022-11-21 09:06:43,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 09:06:43,377 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-21 09:06:43,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:43,378 INFO L225 Difference]: With dead ends: 74 [2022-11-21 09:06:43,378 INFO L226 Difference]: Without dead ends: 72 [2022-11-21 09:06:43,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1669, Unknown=0, NotChecked=0, Total=1892 [2022-11-21 09:06:43,379 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 106 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:43,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 217 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 09:06:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-21 09:06:43,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-11-21 09:06:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-11-21 09:06:43,393 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 44 [2022-11-21 09:06:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:43,394 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-11-21 09:06:43,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 31 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-11-21 09:06:43,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-21 09:06:43,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:43,395 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:43,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:43,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 09:06:43,604 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:43,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:43,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2143538330, now seen corresponding path program 8 times [2022-11-21 09:06:43,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:43,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453740724] [2022-11-21 09:06:43,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:43,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:44,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:44,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453740724] [2022-11-21 09:06:44,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453740724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:44,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020760830] [2022-11-21 09:06:44,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:06:44,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:44,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:44,189 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:44,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 09:06:44,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:06:44,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:44,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-21 09:06:44,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:44,523 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 [2022-11-21 09:06:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:44,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:45,011 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 16 treesize of output 14 [2022-11-21 09:06:45,015 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 20 treesize of output 16 [2022-11-21 09:06:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:45,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020760830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:45,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:45,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 33 [2022-11-21 09:06:45,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332113022] [2022-11-21 09:06:45,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:45,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:06:45,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:45,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:06:45,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:06:45,081 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 33 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:46,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:46,046 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-11-21 09:06:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-21 09:06:46,047 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 33 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-21 09:06:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:46,047 INFO L225 Difference]: With dead ends: 78 [2022-11-21 09:06:46,047 INFO L226 Difference]: Without dead ends: 76 [2022-11-21 09:06:46,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=377, Invalid=3283, Unknown=0, NotChecked=0, Total=3660 [2022-11-21 09:06:46,049 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 164 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:46,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 247 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 09:06:46,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-21 09:06:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-11-21 09:06:46,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2022-11-21 09:06:46,072 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 48 [2022-11-21 09:06:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:46,072 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2022-11-21 09:06:46,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 33 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2022-11-21 09:06:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 09:06:46,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:46,076 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:46,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:46,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 09:06:46,282 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:46,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:46,282 INFO L85 PathProgramCache]: Analyzing trace with hash -546342884, now seen corresponding path program 9 times [2022-11-21 09:06:46,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:46,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112189272] [2022-11-21 09:06:46,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:46,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 51 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:46,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:46,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112189272] [2022-11-21 09:06:46,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112189272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:46,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061303484] [2022-11-21 09:06:46,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:06:46,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:46,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:46,569 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:46,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 09:06:46,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-21 09:06:46,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:46,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 09:06:46,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:47,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:47,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061303484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:47,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:47,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-11-21 09:06:47,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45361596] [2022-11-21 09:06:47,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:47,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 09:06:47,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:47,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 09:06:47,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-11-21 09:06:47,262 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:47,537 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2022-11-21 09:06:47,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 09:06:47,537 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-21 09:06:47,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:47,538 INFO L225 Difference]: With dead ends: 112 [2022-11-21 09:06:47,538 INFO L226 Difference]: Without dead ends: 80 [2022-11-21 09:06:47,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:06:47,540 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 117 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:47,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 140 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 09:06:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-21 09:06:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2022-11-21 09:06:47,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-11-21 09:06:47,555 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 52 [2022-11-21 09:06:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:47,555 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-11-21 09:06:47,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:47,556 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-11-21 09:06:47,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-21 09:06:47,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:47,557 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:47,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:47,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 09:06:47,763 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:47,764 INFO L85 PathProgramCache]: Analyzing trace with hash 969527472, now seen corresponding path program 10 times [2022-11-21 09:06:47,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:47,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815491070] [2022-11-21 09:06:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:47,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:48,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:48,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815491070] [2022-11-21 09:06:48,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815491070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:48,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015330285] [2022-11-21 09:06:48,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 09:06:48,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:48,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:48,502 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:48,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 09:06:48,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 09:06:48,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:48,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-21 09:06:48,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:48,743 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 15 treesize of output 11 [2022-11-21 09:06:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:49,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:49,243 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 16 treesize of output 14 [2022-11-21 09:06:49,245 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 20 treesize of output 16 [2022-11-21 09:06:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:49,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015330285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:49,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:49,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 28 [2022-11-21 09:06:49,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037772922] [2022-11-21 09:06:49,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:49,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 09:06:49,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:49,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 09:06:49,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-11-21 09:06:49,332 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:50,244 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-11-21 09:06:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-21 09:06:50,244 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-21 09:06:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:50,245 INFO L225 Difference]: With dead ends: 82 [2022-11-21 09:06:50,245 INFO L226 Difference]: Without dead ends: 80 [2022-11-21 09:06:50,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 09:06:50,247 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 78 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:50,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 282 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 09:06:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-21 09:06:50,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-11-21 09:06:50,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 75 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:50,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2022-11-21 09:06:50,262 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 55 [2022-11-21 09:06:50,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:50,262 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2022-11-21 09:06:50,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:50,263 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2022-11-21 09:06:50,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 09:06:50,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:50,264 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:50,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:50,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 09:06:50,469 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:50,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:50,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1292279706, now seen corresponding path program 11 times [2022-11-21 09:06:50,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:50,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776069952] [2022-11-21 09:06:50,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:50,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 73 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:50,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:50,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776069952] [2022-11-21 09:06:50,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776069952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:50,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180274079] [2022-11-21 09:06:50,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 09:06:50,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:50,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:50,903 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:50,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 09:06:51,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-21 09:06:51,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:51,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 09:06:51,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 98 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:51,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 98 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:51,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180274079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:51,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:51,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-11-21 09:06:51,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431715728] [2022-11-21 09:06:51,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:51,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 09:06:51,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:51,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 09:06:51,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-11-21 09:06:51,702 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:51,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:06:51,982 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2022-11-21 09:06:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 09:06:51,983 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-21 09:06:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:06:51,984 INFO L225 Difference]: With dead ends: 120 [2022-11-21 09:06:51,984 INFO L226 Difference]: Without dead ends: 84 [2022-11-21 09:06:51,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 92 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 09:06:51,987 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 117 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:06:51,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 127 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 09:06:51,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-21 09:06:52,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-11-21 09:06:52,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 75 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:52,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2022-11-21 09:06:52,002 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 59 [2022-11-21 09:06:52,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:06:52,003 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2022-11-21 09:06:52,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:52,003 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-11-21 09:06:52,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-21 09:06:52,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:06:52,006 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:52,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:52,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:52,212 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:06:52,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:52,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1425668434, now seen corresponding path program 12 times [2022-11-21 09:06:52,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:52,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164228414] [2022-11-21 09:06:52,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:52,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:52,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:52,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164228414] [2022-11-21 09:06:52,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164228414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:52,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098825751] [2022-11-21 09:06:52,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 09:06:52,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:52,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:52,995 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:53,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 09:06:53,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-21 09:06:53,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:53,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-21 09:06:53,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:53,453 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 15 treesize of output 11 [2022-11-21 09:06:54,636 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-21 09:06:54,637 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 44 treesize of output 23 [2022-11-21 09:06:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 91 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:54,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:55,858 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 18 treesize of output 16 [2022-11-21 09:06:55,865 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 26 treesize of output 20 [2022-11-21 09:06:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:56,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098825751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:56,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:56,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2022-11-21 09:06:56,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961987996] [2022-11-21 09:06:56,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:56,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-21 09:06:56,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:56,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-21 09:06:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2323, Unknown=0, NotChecked=0, Total=2652 [2022-11-21 09:06:56,071 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:00,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:07:07,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:07:07,512 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2022-11-21 09:07:07,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-21 09:07:07,513 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-21 09:07:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:07:07,514 INFO L225 Difference]: With dead ends: 165 [2022-11-21 09:07:07,514 INFO L226 Difference]: Without dead ends: 88 [2022-11-21 09:07:07,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 85 SyntacticMatches, 8 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3409 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1655, Invalid=12147, Unknown=4, NotChecked=0, Total=13806 [2022-11-21 09:07:07,520 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 514 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 183 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-21 09:07:07,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 507 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1130 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-11-21 09:07:07,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-21 09:07:07,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2022-11-21 09:07:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:07,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-11-21 09:07:07,535 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 62 [2022-11-21 09:07:07,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:07:07,535 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-11-21 09:07:07,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-11-21 09:07:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-21 09:07:07,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:07:07,537 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:07,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 09:07:07,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 09:07:07,743 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:07:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:07,743 INFO L85 PathProgramCache]: Analyzing trace with hash -336356764, now seen corresponding path program 2 times [2022-11-21 09:07:07,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:07:07,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821868663] [2022-11-21 09:07:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:07,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:07:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-21 09:07:08,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:07:08,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821868663] [2022-11-21 09:07:08,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821868663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:07:08,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141780920] [2022-11-21 09:07:08,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:07:08,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:08,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:07:08,043 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:07:08,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 09:07:08,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:07:08,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:07:08,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 09:07:08,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-21 09:07:08,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-21 09:07:08,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141780920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:08,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:07:08,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2022-11-21 09:07:08,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729914486] [2022-11-21 09:07:08,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:08,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 09:07:08,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:07:08,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 09:07:08,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-11-21 09:07:08,546 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:07:08,881 INFO L93 Difference]: Finished difference Result 274 states and 293 transitions. [2022-11-21 09:07:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 09:07:08,882 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-21 09:07:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:07:08,883 INFO L225 Difference]: With dead ends: 274 [2022-11-21 09:07:08,883 INFO L226 Difference]: Without dead ends: 238 [2022-11-21 09:07:08,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-11-21 09:07:08,885 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 428 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 09:07:08,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 112 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 09:07:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-21 09:07:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 121. [2022-11-21 09:07:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-11-21 09:07:08,906 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 77 [2022-11-21 09:07:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:07:08,907 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-11-21 09:07:08,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:08,907 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-11-21 09:07:08,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-21 09:07:08,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:07:08,909 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:08,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 09:07:09,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 09:07:09,114 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:07:09,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:09,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1186343452, now seen corresponding path program 3 times [2022-11-21 09:07:09,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:07:09,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415829518] [2022-11-21 09:07:09,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:09,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:07:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-21 09:07:09,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:07:09,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415829518] [2022-11-21 09:07:09,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415829518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:07:09,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178326051] [2022-11-21 09:07:09,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:07:09,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:09,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:07:09,965 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:07:09,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 09:07:14,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-11-21 09:07:14,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:07:14,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 09:07:14,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-21 09:07:14,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-21 09:07:16,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178326051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:16,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:07:16,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2022-11-21 09:07:16,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778005906] [2022-11-21 09:07:16,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:16,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-21 09:07:16,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:07:16,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-21 09:07:16,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2022-11-21 09:07:16,134 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 57 states, 57 states have (on average 3.1403508771929824) internal successors, (179), 57 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:17,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:07:17,009 INFO L93 Difference]: Finished difference Result 526 states and 559 transitions. [2022-11-21 09:07:17,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-21 09:07:17,015 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.1403508771929824) internal successors, (179), 57 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-11-21 09:07:17,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:07:17,017 INFO L225 Difference]: With dead ends: 526 [2022-11-21 09:07:17,017 INFO L226 Difference]: Without dead ends: 490 [2022-11-21 09:07:17,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2022-11-21 09:07:17,019 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 959 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 09:07:17,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 228 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 09:07:17,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-11-21 09:07:17,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 205. [2022-11-21 09:07:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2022-11-21 09:07:17,053 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 119 [2022-11-21 09:07:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:07:17,054 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2022-11-21 09:07:17,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.1403508771929824) internal successors, (179), 57 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2022-11-21 09:07:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-21 09:07:17,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:07:17,057 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 54, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:17,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-21 09:07:17,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 09:07:17,270 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:07:17,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:17,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1171837724, now seen corresponding path program 4 times [2022-11-21 09:07:17,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:07:17,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995772877] [2022-11-21 09:07:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:17,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:07:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 109 proven. 4401 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-21 09:07:20,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:07:20,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995772877] [2022-11-21 09:07:20,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995772877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:07:20,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992773491] [2022-11-21 09:07:20,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 09:07:20,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:20,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:07:20,237 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:07:20,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 09:07:20,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 09:07:20,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:07:20,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-21 09:07:20,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 109 proven. 4401 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-21 09:07:20,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 109 proven. 4401 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-21 09:07:24,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992773491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:24,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:07:24,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 113 [2022-11-21 09:07:24,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685843326] [2022-11-21 09:07:24,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:24,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-11-21 09:07:24,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:07:24,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-11-21 09:07:24,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2022-11-21 09:07:24,901 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 113 states, 113 states have (on average 3.0707964601769913) internal successors, (347), 113 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 09:07:28,665 INFO L93 Difference]: Finished difference Result 1030 states and 1091 transitions. [2022-11-21 09:07:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-21 09:07:28,666 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 3.0707964601769913) internal successors, (347), 113 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2022-11-21 09:07:28,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 09:07:28,672 INFO L225 Difference]: With dead ends: 1030 [2022-11-21 09:07:28,672 INFO L226 Difference]: Without dead ends: 994 [2022-11-21 09:07:28,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2022-11-21 09:07:28,675 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2078 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2078 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-21 09:07:28,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2078 Valid, 457 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-21 09:07:28,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-11-21 09:07:28,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 373. [2022-11-21 09:07:28,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.010752688172043) internal successors, (376), 372 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:28,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 376 transitions. [2022-11-21 09:07:28,754 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 376 transitions. Word has length 203 [2022-11-21 09:07:28,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 09:07:28,755 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 376 transitions. [2022-11-21 09:07:28,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 3.0707964601769913) internal successors, (347), 113 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:28,755 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 376 transitions. [2022-11-21 09:07:28,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-11-21 09:07:28,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 09:07:28,761 INFO L195 NwaCegarLoop]: trace histogram [111, 111, 110, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:28,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-21 09:07:28,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:28,967 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 09:07:28,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:28,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1841650404, now seen corresponding path program 5 times [2022-11-21 09:07:28,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:07:28,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375661984] [2022-11-21 09:07:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:28,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:07:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18524 backedges. 221 proven. 18205 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-21 09:07:39,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:07:39,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375661984] [2022-11-21 09:07:39,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375661984] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:07:39,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460220269] [2022-11-21 09:07:39,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 09:07:39,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:39,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:07:39,499 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:07:39,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ebc38-4431-4540-aa5c-6572ac605e94/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process