./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 981e3791b3b9e818d7e8a5acebc5383a1ff1697fc3109e1899a4ce1c6a11f286 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:35:11,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:35:11,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:35:11,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:35:11,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:35:11,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:35:11,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:35:11,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:35:11,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:35:11,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:35:11,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:35:11,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:35:11,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:35:11,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:35:11,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:35:11,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:35:11,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:35:11,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:35:11,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:35:11,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:35:11,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:35:11,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:35:11,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:35:11,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:35:11,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:35:11,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:35:11,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:35:11,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:35:11,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:35:11,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:35:11,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:35:11,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:35:11,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:35:11,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:35:11,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:35:11,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:35:11,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:35:11,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:35:11,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:35:11,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:35:11,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:35:11,295 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:35:11,319 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:35:11,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:35:11,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:35:11,320 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:35:11,321 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:35:11,321 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:35:11,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:35:11,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:35:11,322 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:35:11,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:35:11,323 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:35:11,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:35:11,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:35:11,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:35:11,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:35:11,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:35:11,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:35:11,325 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:35:11,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:35:11,325 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:35:11,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:35:11,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:35:11,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:35:11,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:35:11,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:35:11,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:35:11,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:35:11,327 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:35:11,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:35:11,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:35:11,328 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:35:11,328 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:35:11,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:35:11,328 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_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 981e3791b3b9e818d7e8a5acebc5383a1ff1697fc3109e1899a4ce1c6a11f286 [2022-11-18 19:35:11,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:35:11,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:35:11,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:35:11,620 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:35:11,621 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:35:11,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/eca-rers2012/Problem19_label20.c [2022-11-18 19:35:11,699 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/data/3d88b0b9b/b86d8787832649b0a1e73fc3b6bd805e/FLAG51af90a7d [2022-11-18 19:35:12,743 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:35:12,744 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/sv-benchmarks/c/eca-rers2012/Problem19_label20.c [2022-11-18 19:35:12,816 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/data/3d88b0b9b/b86d8787832649b0a1e73fc3b6bd805e/FLAG51af90a7d [2022-11-18 19:35:13,052 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/data/3d88b0b9b/b86d8787832649b0a1e73fc3b6bd805e [2022-11-18 19:35:13,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:35:13,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:35:13,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:35:13,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:35:13,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:35:13,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:35:13" (1/1) ... [2022-11-18 19:35:13,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dd2d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:13, skipping insertion in model container [2022-11-18 19:35:13,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:35:13" (1/1) ... [2022-11-18 19:35:13,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:35:13,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:35:13,837 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/sv-benchmarks/c/eca-rers2012/Problem19_label20.c[5771,5784] [2022-11-18 19:35:15,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:35:15,733 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:35:15,770 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/sv-benchmarks/c/eca-rers2012/Problem19_label20.c[5771,5784] [2022-11-18 19:35:16,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:35:16,844 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:35:16,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:16 WrapperNode [2022-11-18 19:35:16,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:35:16,846 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:35:16,846 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:35:16,846 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:35:16,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:16" (1/1) ... [2022-11-18 19:35:16,958 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:16" (1/1) ... [2022-11-18 19:35:17,863 INFO L138 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2022-11-18 19:35:17,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:35:17,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:35:17,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:35:17,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:35:17,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:16" (1/1) ... [2022-11-18 19:35:17,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:16" (1/1) ... [2022-11-18 19:35:18,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:16" (1/1) ... [2022-11-18 19:35:18,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:16" (1/1) ... [2022-11-18 19:35:18,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:16" (1/1) ... [2022-11-18 19:35:18,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:16" (1/1) ... [2022-11-18 19:35:18,909 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:16" (1/1) ... [2022-11-18 19:35:18,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:16" (1/1) ... [2022-11-18 19:35:19,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:35:19,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:35:19,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:35:19,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:35:19,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:16" (1/1) ... [2022-11-18 19:35:19,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:35:19,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:35:19,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:35:19,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:35:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:35:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:35:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:35:19,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:35:19,389 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:35:19,391 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:35:29,859 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:35:29,896 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:35:29,896 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 19:35:29,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:35:29 BoogieIcfgContainer [2022-11-18 19:35:29,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:35:29,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:35:29,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:35:29,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:35:29,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:35:13" (1/3) ... [2022-11-18 19:35:29,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659a9f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:35:29, skipping insertion in model container [2022-11-18 19:35:29,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:16" (2/3) ... [2022-11-18 19:35:29,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659a9f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:35:29, skipping insertion in model container [2022-11-18 19:35:29,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:35:29" (3/3) ... [2022-11-18 19:35:29,910 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label20.c [2022-11-18 19:35:29,934 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:35:29,934 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:35:30,051 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:35:30,061 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;@69b3dc21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:35:30,061 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 19:35:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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) [2022-11-18 19:35:30,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 19:35:30,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:35:30,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:35:30,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:35:30,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:30,095 INFO L85 PathProgramCache]: Analyzing trace with hash 712930081, now seen corresponding path program 1 times [2022-11-18 19:35:30,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:30,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964835965] [2022-11-18 19:35:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:30,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:35:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:30,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:30,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964835965] [2022-11-18 19:35:30,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964835965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:35:30,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:35:30,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:35:30,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635468731] [2022-11-18 19:35:30,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:35:30,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:35:30,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:30,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:35:30,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:35:30,658 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 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) [2022-11-18 19:35:40,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:35:40,464 INFO L93 Difference]: Finished difference Result 4919 states and 9313 transitions. [2022-11-18 19:35:40,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:35:40,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 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 43 [2022-11-18 19:35:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:35:40,512 INFO L225 Difference]: With dead ends: 4919 [2022-11-18 19:35:40,512 INFO L226 Difference]: Without dead ends: 3107 [2022-11-18 19:35:40,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:35:40,523 INFO L413 NwaCegarLoop]: 1276 mSDtfsCounter, 1510 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4638 mSolverCounterSat, 1110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1510 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 5748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1110 IncrementalHoareTripleChecker+Valid, 4638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:35:40,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1510 Valid, 1457 Invalid, 5748 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1110 Valid, 4638 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2022-11-18 19:35:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2022-11-18 19:35:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3106. [2022-11-18 19:35:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 1.652818035426731) internal successors, (5132), 3105 states have internal predecessors, (5132), 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) [2022-11-18 19:35:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 5132 transitions. [2022-11-18 19:35:40,685 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 5132 transitions. Word has length 43 [2022-11-18 19:35:40,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:35:40,685 INFO L495 AbstractCegarLoop]: Abstraction has 3106 states and 5132 transitions. [2022-11-18 19:35:40,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 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) [2022-11-18 19:35:40,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 5132 transitions. [2022-11-18 19:35:40,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 19:35:40,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:35:40,693 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:35:40,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:35:40,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:35:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:40,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1181766134, now seen corresponding path program 1 times [2022-11-18 19:35:40,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:40,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199313730] [2022-11-18 19:35:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:40,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:35:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:41,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:41,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199313730] [2022-11-18 19:35:41,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199313730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:35:41,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:35:41,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:35:41,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974375076] [2022-11-18 19:35:41,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:35:41,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:35:41,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:41,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:35:41,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:35:41,304 INFO L87 Difference]: Start difference. First operand 3106 states and 5132 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 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) [2022-11-18 19:35:58,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:35:58,859 INFO L93 Difference]: Finished difference Result 10391 states and 16943 transitions. [2022-11-18 19:35:58,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:35:58,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 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 112 [2022-11-18 19:35:58,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:35:58,886 INFO L225 Difference]: With dead ends: 10391 [2022-11-18 19:35:58,886 INFO L226 Difference]: Without dead ends: 7287 [2022-11-18 19:35:58,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:35:58,892 INFO L413 NwaCegarLoop]: 1842 mSDtfsCounter, 4208 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 11122 mSolverCounterSat, 1405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4208 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 12527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1405 IncrementalHoareTripleChecker+Valid, 11122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:35:58,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4208 Valid, 2104 Invalid, 12527 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1405 Valid, 11122 Invalid, 0 Unknown, 0 Unchecked, 17.1s Time] [2022-11-18 19:35:58,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7287 states. [2022-11-18 19:35:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7287 to 7236. [2022-11-18 19:35:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 1.5214927436074637) internal successors, (11008), 7235 states have internal predecessors, (11008), 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) [2022-11-18 19:35:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 11008 transitions. [2022-11-18 19:35:59,046 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 11008 transitions. Word has length 112 [2022-11-18 19:35:59,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:35:59,051 INFO L495 AbstractCegarLoop]: Abstraction has 7236 states and 11008 transitions. [2022-11-18 19:35:59,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 3 states have internal predecessors, (112), 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) [2022-11-18 19:35:59,052 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 11008 transitions. [2022-11-18 19:35:59,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-18 19:35:59,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:35:59,059 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:35:59,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:35:59,059 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:35:59,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:59,060 INFO L85 PathProgramCache]: Analyzing trace with hash -886359095, now seen corresponding path program 1 times [2022-11-18 19:35:59,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:59,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476093170] [2022-11-18 19:35:59,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:59,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:35:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:59,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:59,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476093170] [2022-11-18 19:35:59,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476093170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:35:59,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:35:59,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:35:59,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132315996] [2022-11-18 19:35:59,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:35:59,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:35:59,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:59,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:35:59,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:35:59,947 INFO L87 Difference]: Start difference. First operand 7236 states and 11008 transitions. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 3 states have internal predecessors, (278), 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) [2022-11-18 19:36:09,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:36:09,399 INFO L93 Difference]: Finished difference Result 13136 states and 20668 transitions. [2022-11-18 19:36:09,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:36:09,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 3 states have internal predecessors, (278), 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 278 [2022-11-18 19:36:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:36:09,424 INFO L225 Difference]: With dead ends: 13136 [2022-11-18 19:36:09,424 INFO L226 Difference]: Without dead ends: 7236 [2022-11-18 19:36:09,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:36:09,433 INFO L413 NwaCegarLoop]: 1767 mSDtfsCounter, 1140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7319 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2109 SdHoareTripleChecker+Invalid, 7327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:36:09,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 2109 Invalid, 7327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7319 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-11-18 19:36:09,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7236 states. [2022-11-18 19:36:09,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7236 to 7236. [2022-11-18 19:36:09,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 1.5202487906012438) internal successors, (10999), 7235 states have internal predecessors, (10999), 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) [2022-11-18 19:36:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 10999 transitions. [2022-11-18 19:36:09,598 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 10999 transitions. Word has length 278 [2022-11-18 19:36:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:36:09,601 INFO L495 AbstractCegarLoop]: Abstraction has 7236 states and 10999 transitions. [2022-11-18 19:36:09,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 3 states have internal predecessors, (278), 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) [2022-11-18 19:36:09,602 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 10999 transitions. [2022-11-18 19:36:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2022-11-18 19:36:09,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:36:09,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:36:09,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 19:36:09,623 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:36:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:09,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2115485552, now seen corresponding path program 1 times [2022-11-18 19:36:09,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:09,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636190985] [2022-11-18 19:36:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:09,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:36:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-18 19:36:10,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:36:10,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636190985] [2022-11-18 19:36:10,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636190985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:36:10,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:36:10,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:36:10,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980145217] [2022-11-18 19:36:10,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:36:10,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:36:10,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:36:10,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:36:10,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:36:10,504 INFO L87 Difference]: Start difference. First operand 7236 states and 10999 transitions. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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) [2022-11-18 19:36:18,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:36:18,203 INFO L93 Difference]: Finished difference Result 15842 states and 24472 transitions. [2022-11-18 19:36:18,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:36:18,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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 595 [2022-11-18 19:36:18,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:36:18,238 INFO L225 Difference]: With dead ends: 15842 [2022-11-18 19:36:18,238 INFO L226 Difference]: Without dead ends: 9973 [2022-11-18 19:36:18,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:36:18,246 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 1396 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3927 mSolverCounterSat, 1671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 5598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1671 IncrementalHoareTripleChecker+Valid, 3927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:36:18,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1396 Valid, 754 Invalid, 5598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1671 Valid, 3927 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-18 19:36:18,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9973 states. [2022-11-18 19:36:18,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9973 to 9969. [2022-11-18 19:36:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9969 states, 9968 states have (on average 1.3901484751203852) internal successors, (13857), 9968 states have internal predecessors, (13857), 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) [2022-11-18 19:36:18,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9969 states to 9969 states and 13857 transitions. [2022-11-18 19:36:18,446 INFO L78 Accepts]: Start accepts. Automaton has 9969 states and 13857 transitions. Word has length 595 [2022-11-18 19:36:18,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:36:18,448 INFO L495 AbstractCegarLoop]: Abstraction has 9969 states and 13857 transitions. [2022-11-18 19:36:18,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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) [2022-11-18 19:36:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 9969 states and 13857 transitions. [2022-11-18 19:36:18,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2022-11-18 19:36:18,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:36:18,464 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:36:18,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 19:36:18,466 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:36:18,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:18,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1960420425, now seen corresponding path program 1 times [2022-11-18 19:36:18,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:18,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156907198] [2022-11-18 19:36:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:18,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:36:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-18 19:36:19,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:36:19,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156907198] [2022-11-18 19:36:19,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156907198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:36:19,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:36:19,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:36:19,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522383936] [2022-11-18 19:36:19,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:36:19,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:36:19,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:36:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:36:19,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:36:19,144 INFO L87 Difference]: Start difference. First operand 9969 states and 13857 transitions. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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) [2022-11-18 19:36:28,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:36:28,986 INFO L93 Difference]: Finished difference Result 26933 states and 38507 transitions. [2022-11-18 19:36:28,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:36:28,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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 598 [2022-11-18 19:36:28,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:36:29,025 INFO L225 Difference]: With dead ends: 26933 [2022-11-18 19:36:29,026 INFO L226 Difference]: Without dead ends: 18331 [2022-11-18 19:36:29,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:36:29,037 INFO L413 NwaCegarLoop]: 713 mSDtfsCounter, 2119 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 5113 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 5547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:36:29,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2119 Valid, 982 Invalid, 5547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5113 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-11-18 19:36:29,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18331 states. [2022-11-18 19:36:29,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18331 to 18329. [2022-11-18 19:36:29,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18329 states, 18328 states have (on average 1.378601047577477) internal successors, (25267), 18328 states have internal predecessors, (25267), 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) [2022-11-18 19:36:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18329 states to 18329 states and 25267 transitions. [2022-11-18 19:36:29,381 INFO L78 Accepts]: Start accepts. Automaton has 18329 states and 25267 transitions. Word has length 598 [2022-11-18 19:36:29,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:36:29,383 INFO L495 AbstractCegarLoop]: Abstraction has 18329 states and 25267 transitions. [2022-11-18 19:36:29,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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) [2022-11-18 19:36:29,387 INFO L276 IsEmpty]: Start isEmpty. Operand 18329 states and 25267 transitions. [2022-11-18 19:36:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2022-11-18 19:36:29,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:36:29,405 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:36:29,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:36:29,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:36:29,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:29,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1121237306, now seen corresponding path program 1 times [2022-11-18 19:36:29,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:29,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123720051] [2022-11-18 19:36:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:29,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:36:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 81 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:32,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:36:32,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123720051] [2022-11-18 19:36:32,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123720051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:36:32,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311220550] [2022-11-18 19:36:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:32,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:36:32,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:36:32,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:36:32,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:36:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:36:32,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 19:36:32,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:36:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-18 19:36:32,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:36:32,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311220550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:36:32,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:36:32,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-18 19:36:32,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680795120] [2022-11-18 19:36:32,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:36:32,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:36:32,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:36:32,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:36:32,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:36:32,875 INFO L87 Difference]: Start difference. First operand 18329 states and 25267 transitions. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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) [2022-11-18 19:36:41,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:36:41,978 INFO L93 Difference]: Finished difference Result 51713 states and 72347 transitions. [2022-11-18 19:36:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:36:41,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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 612 [2022-11-18 19:36:41,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:36:42,045 INFO L225 Difference]: With dead ends: 51713 [2022-11-18 19:36:42,046 INFO L226 Difference]: Without dead ends: 34751 [2022-11-18 19:36:42,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:36:42,065 INFO L413 NwaCegarLoop]: 1958 mSDtfsCounter, 1678 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 4894 mSolverCounterSat, 1117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 6011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1117 IncrementalHoareTripleChecker+Valid, 4894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:36:42,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1678 Valid, 2065 Invalid, 6011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1117 Valid, 4894 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-11-18 19:36:42,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34751 states. [2022-11-18 19:36:42,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34751 to 34728. [2022-11-18 19:36:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34728 states, 34727 states have (on average 1.3551415325251246) internal successors, (47060), 34727 states have internal predecessors, (47060), 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) [2022-11-18 19:36:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34728 states to 34728 states and 47060 transitions. [2022-11-18 19:36:42,646 INFO L78 Accepts]: Start accepts. Automaton has 34728 states and 47060 transitions. Word has length 612 [2022-11-18 19:36:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:36:42,647 INFO L495 AbstractCegarLoop]: Abstraction has 34728 states and 47060 transitions. [2022-11-18 19:36:42,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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) [2022-11-18 19:36:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 34728 states and 47060 transitions. [2022-11-18 19:36:42,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2022-11-18 19:36:42,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:36:42,653 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:36:42,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:36:42,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:36:42,859 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:36:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:42,860 INFO L85 PathProgramCache]: Analyzing trace with hash -879143974, now seen corresponding path program 1 times [2022-11-18 19:36:42,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:42,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149069263] [2022-11-18 19:36:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:42,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:36:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 19:36:43,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:36:43,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149069263] [2022-11-18 19:36:43,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149069263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:36:43,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:36:43,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:36:43,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359327545] [2022-11-18 19:36:43,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:36:43,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:36:43,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:36:43,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:36:43,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:36:43,516 INFO L87 Difference]: Start difference. First operand 34728 states and 47060 transitions. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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) [2022-11-18 19:36:52,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:36:52,940 INFO L93 Difference]: Finished difference Result 98323 states and 134131 transitions. [2022-11-18 19:36:52,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:36:52,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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 619 [2022-11-18 19:36:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:36:53,058 INFO L225 Difference]: With dead ends: 98323 [2022-11-18 19:36:53,059 INFO L226 Difference]: Without dead ends: 64962 [2022-11-18 19:36:53,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:36:53,085 INFO L413 NwaCegarLoop]: 1429 mSDtfsCounter, 1356 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 4206 mSolverCounterSat, 1424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 5630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1424 IncrementalHoareTripleChecker+Valid, 4206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:36:53,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 1695 Invalid, 5630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1424 Valid, 4206 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-11-18 19:36:53,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64962 states. [2022-11-18 19:36:53,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64962 to 62214. [2022-11-18 19:36:53,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62214 states, 62213 states have (on average 1.2403516949833635) internal successors, (77166), 62213 states have internal predecessors, (77166), 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) [2022-11-18 19:36:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62214 states to 62214 states and 77166 transitions. [2022-11-18 19:36:54,003 INFO L78 Accepts]: Start accepts. Automaton has 62214 states and 77166 transitions. Word has length 619 [2022-11-18 19:36:54,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:36:54,005 INFO L495 AbstractCegarLoop]: Abstraction has 62214 states and 77166 transitions. [2022-11-18 19:36:54,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 2 states have internal predecessors, (523), 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) [2022-11-18 19:36:54,005 INFO L276 IsEmpty]: Start isEmpty. Operand 62214 states and 77166 transitions. [2022-11-18 19:36:54,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2022-11-18 19:36:54,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:36:54,011 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:36:54,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 19:36:54,012 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:36:54,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:54,013 INFO L85 PathProgramCache]: Analyzing trace with hash 309181723, now seen corresponding path program 1 times [2022-11-18 19:36:54,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:54,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108622990] [2022-11-18 19:36:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:54,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:36:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 154 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:55,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:36:55,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108622990] [2022-11-18 19:36:55,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108622990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:36:55,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642820498] [2022-11-18 19:36:55,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:55,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:36:55,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:36:55,152 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:36:55,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:36:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:36:55,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 19:36:55,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:36:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-18 19:36:55,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:36:55,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642820498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:36:55,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:36:55,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-18 19:36:55,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065969642] [2022-11-18 19:36:55,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:36:55,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:36:55,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:36:55,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:36:55,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:36:55,726 INFO L87 Difference]: Start difference. First operand 62214 states and 77166 transitions. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 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) [2022-11-18 19:37:06,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:37:06,354 INFO L93 Difference]: Finished difference Result 123167 states and 153151 transitions. [2022-11-18 19:37:06,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:37:06,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 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 634 [2022-11-18 19:37:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:37:06,623 INFO L225 Difference]: With dead ends: 123167 [2022-11-18 19:37:06,624 INFO L226 Difference]: Without dead ends: 62320 [2022-11-18 19:37:06,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 633 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:37:06,694 INFO L413 NwaCegarLoop]: 2770 mSDtfsCounter, 1425 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4069 mSolverCounterSat, 1722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1425 SdHoareTripleChecker+Valid, 2942 SdHoareTripleChecker+Invalid, 5791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1722 IncrementalHoareTripleChecker+Valid, 4069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:37:06,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1425 Valid, 2942 Invalid, 5791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1722 Valid, 4069 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2022-11-18 19:37:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62320 states. [2022-11-18 19:37:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62320 to 59507. [2022-11-18 19:37:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59507 states, 59506 states have (on average 1.1772090209390649) internal successors, (70051), 59506 states have internal predecessors, (70051), 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) [2022-11-18 19:37:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59507 states to 59507 states and 70051 transitions. [2022-11-18 19:37:07,832 INFO L78 Accepts]: Start accepts. Automaton has 59507 states and 70051 transitions. Word has length 634 [2022-11-18 19:37:07,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:37:07,840 INFO L495 AbstractCegarLoop]: Abstraction has 59507 states and 70051 transitions. [2022-11-18 19:37:07,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 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) [2022-11-18 19:37:07,841 INFO L276 IsEmpty]: Start isEmpty. Operand 59507 states and 70051 transitions. [2022-11-18 19:37:07,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 741 [2022-11-18 19:37:07,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:37:07,850 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:37:07,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:37:08,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 19:37:08,057 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:37:08,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:37:08,058 INFO L85 PathProgramCache]: Analyzing trace with hash -596367484, now seen corresponding path program 1 times [2022-11-18 19:37:08,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:37:08,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013375404] [2022-11-18 19:37:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:37:08,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:37:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:37:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 81 proven. 37 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-18 19:37:10,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:37:10,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013375404] [2022-11-18 19:37:10,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013375404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:37:10,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133641537] [2022-11-18 19:37:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:37:10,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:37:10,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:37:10,441 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:37:10,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:37:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:37:10,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 19:37:10,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:37:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-11-18 19:37:10,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:37:10,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133641537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:37:10,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:37:10,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-18 19:37:10,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739401494] [2022-11-18 19:37:10,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:37:10,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:37:10,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:37:10,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:37:10,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:37:10,997 INFO L87 Difference]: Start difference. First operand 59507 states and 70051 transitions. Second operand has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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) [2022-11-18 19:37:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:37:21,473 INFO L93 Difference]: Finished difference Result 138144 states and 164585 transitions. [2022-11-18 19:37:21,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:37:21,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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 740 [2022-11-18 19:37:21,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:37:21,586 INFO L225 Difference]: With dead ends: 138144 [2022-11-18 19:37:21,587 INFO L226 Difference]: Without dead ends: 80004 [2022-11-18 19:37:21,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 739 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:37:21,622 INFO L413 NwaCegarLoop]: 1257 mSDtfsCounter, 1562 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4849 mSolverCounterSat, 979 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 5828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 979 IncrementalHoareTripleChecker+Valid, 4849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:37:21,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1562 Valid, 1379 Invalid, 5828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [979 Valid, 4849 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-18 19:37:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80004 states. [2022-11-18 19:37:22,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80004 to 75896. [2022-11-18 19:37:22,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75896 states, 75895 states have (on average 1.1777587456354173) internal successors, (89386), 75895 states have internal predecessors, (89386), 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) [2022-11-18 19:37:22,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75896 states to 75896 states and 89386 transitions. [2022-11-18 19:37:22,884 INFO L78 Accepts]: Start accepts. Automaton has 75896 states and 89386 transitions. Word has length 740 [2022-11-18 19:37:22,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:37:22,885 INFO L495 AbstractCegarLoop]: Abstraction has 75896 states and 89386 transitions. [2022-11-18 19:37:22,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 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) [2022-11-18 19:37:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 75896 states and 89386 transitions. [2022-11-18 19:37:22,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 837 [2022-11-18 19:37:22,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:37:22,897 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:37:22,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:37:23,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:37:23,104 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:37:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:37:23,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1315598967, now seen corresponding path program 1 times [2022-11-18 19:37:23,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:37:23,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826171674] [2022-11-18 19:37:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:37:23,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:37:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:37:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 113 proven. 9 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-11-18 19:37:24,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:37:24,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826171674] [2022-11-18 19:37:24,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826171674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:37:24,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165169828] [2022-11-18 19:37:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:37:24,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:37:24,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:37:24,967 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:37:24,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:37:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:37:25,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 19:37:25,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:37:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-11-18 19:37:25,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:37:25,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165169828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:37:25,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:37:25,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-18 19:37:25,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034923312] [2022-11-18 19:37:25,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:37:25,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:37:25,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:37:25,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:37:25,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:37:25,581 INFO L87 Difference]: Start difference. First operand 75896 states and 89386 transitions. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 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) [2022-11-18 19:37:35,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:37:35,858 INFO L93 Difference]: Finished difference Result 170913 states and 203244 transitions. [2022-11-18 19:37:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:37:35,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 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 836 [2022-11-18 19:37:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:37:35,981 INFO L225 Difference]: With dead ends: 170913 [2022-11-18 19:37:35,981 INFO L226 Difference]: Without dead ends: 96384 [2022-11-18 19:37:36,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 835 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:37:36,007 INFO L413 NwaCegarLoop]: 2973 mSDtfsCounter, 1512 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 3694 mSolverCounterSat, 1636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 3159 SdHoareTripleChecker+Invalid, 5330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1636 IncrementalHoareTripleChecker+Valid, 3694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:37:36,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1512 Valid, 3159 Invalid, 5330 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1636 Valid, 3694 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-18 19:37:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96384 states. [2022-11-18 19:37:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96384 to 92280. [2022-11-18 19:37:37,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92280 states, 92279 states have (on average 1.1593536991081395) internal successors, (106984), 92279 states have internal predecessors, (106984), 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) [2022-11-18 19:37:37,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92280 states to 92280 states and 106984 transitions. [2022-11-18 19:37:37,412 INFO L78 Accepts]: Start accepts. Automaton has 92280 states and 106984 transitions. Word has length 836 [2022-11-18 19:37:37,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:37:37,413 INFO L495 AbstractCegarLoop]: Abstraction has 92280 states and 106984 transitions. [2022-11-18 19:37:37,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 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) [2022-11-18 19:37:37,413 INFO L276 IsEmpty]: Start isEmpty. Operand 92280 states and 106984 transitions. [2022-11-18 19:37:37,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2022-11-18 19:37:37,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:37:37,436 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:37:37,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:37:37,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 19:37:37,643 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:37:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:37:37,644 INFO L85 PathProgramCache]: Analyzing trace with hash 481049972, now seen corresponding path program 1 times [2022-11-18 19:37:37,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:37:37,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135214655] [2022-11-18 19:37:37,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:37:37,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:37:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:37:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-18 19:37:38,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:37:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135214655] [2022-11-18 19:37:38,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135214655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:37:38,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:37:38,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:37:38,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017409327] [2022-11-18 19:37:38,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:37:38,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:37:38,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:37:38,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:37:38,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:37:38,956 INFO L87 Difference]: Start difference. First operand 92280 states and 106984 transitions. Second operand has 4 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 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) [2022-11-18 19:37:57,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:37:57,169 INFO L93 Difference]: Finished difference Result 274688 states and 325395 transitions. [2022-11-18 19:37:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:37:57,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 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 903 [2022-11-18 19:37:57,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:37:57,496 INFO L225 Difference]: With dead ends: 274688 [2022-11-18 19:37:57,496 INFO L226 Difference]: Without dead ends: 183775 [2022-11-18 19:37:57,552 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 [2022-11-18 19:37:57,553 INFO L413 NwaCegarLoop]: 2610 mSDtfsCounter, 4345 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 7303 mSolverCounterSat, 1850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4345 SdHoareTripleChecker+Valid, 2854 SdHoareTripleChecker+Invalid, 9153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1850 IncrementalHoareTripleChecker+Valid, 7303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:37:57,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4345 Valid, 2854 Invalid, 9153 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1850 Valid, 7303 Invalid, 0 Unknown, 0 Unchecked, 16.7s Time] [2022-11-18 19:37:57,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183775 states. [2022-11-18 19:38:00,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183775 to 183764. [2022-11-18 19:38:00,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183764 states, 183763 states have (on average 1.1541877309360427) internal successors, (212097), 183763 states have internal predecessors, (212097), 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) [2022-11-18 19:38:00,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183764 states to 183764 states and 212097 transitions. [2022-11-18 19:38:00,616 INFO L78 Accepts]: Start accepts. Automaton has 183764 states and 212097 transitions. Word has length 903 [2022-11-18 19:38:00,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:00,617 INFO L495 AbstractCegarLoop]: Abstraction has 183764 states and 212097 transitions. [2022-11-18 19:38:00,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 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) [2022-11-18 19:38:00,617 INFO L276 IsEmpty]: Start isEmpty. Operand 183764 states and 212097 transitions. [2022-11-18 19:38:00,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2022-11-18 19:38:00,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:00,636 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:00,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 19:38:00,636 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:38:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:00,637 INFO L85 PathProgramCache]: Analyzing trace with hash -482988306, now seen corresponding path program 1 times [2022-11-18 19:38:00,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:00,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103596272] [2022-11-18 19:38:00,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:00,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 82 proven. 481 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-18 19:38:03,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:03,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103596272] [2022-11-18 19:38:03,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103596272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:38:03,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521689870] [2022-11-18 19:38:03,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:03,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:03,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:03,510 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:38:03,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:38:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:04,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 19:38:04,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-11-18 19:38:04,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:38:04,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521689870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:38:04,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:38:04,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-18 19:38:04,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211893038] [2022-11-18 19:38:04,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:38:04,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:38:04,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:04,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:38:04,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:38:04,188 INFO L87 Difference]: Start difference. First operand 183764 states and 212097 transitions. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 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) [2022-11-18 19:38:16,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:16,599 INFO L93 Difference]: Finished difference Result 450915 states and 523564 transitions. [2022-11-18 19:38:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:38:16,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 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 975 [2022-11-18 19:38:16,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:16,955 INFO L225 Difference]: With dead ends: 450915 [2022-11-18 19:38:16,955 INFO L226 Difference]: Without dead ends: 268518 [2022-11-18 19:38:17,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 976 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:38:17,032 INFO L413 NwaCegarLoop]: 3099 mSDtfsCounter, 1439 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 5026 mSolverCounterSat, 907 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 3270 SdHoareTripleChecker+Invalid, 5933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 907 IncrementalHoareTripleChecker+Valid, 5026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:17,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1439 Valid, 3270 Invalid, 5933 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [907 Valid, 5026 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2022-11-18 19:38:17,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268518 states. [2022-11-18 19:38:20,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268518 to 262949. [2022-11-18 19:38:20,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262949 states, 262948 states have (on average 1.1350837427932519) internal successors, (298468), 262948 states have internal predecessors, (298468), 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) [2022-11-18 19:38:21,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262949 states to 262949 states and 298468 transitions. [2022-11-18 19:38:21,136 INFO L78 Accepts]: Start accepts. Automaton has 262949 states and 298468 transitions. Word has length 975 [2022-11-18 19:38:21,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:21,136 INFO L495 AbstractCegarLoop]: Abstraction has 262949 states and 298468 transitions. [2022-11-18 19:38:21,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 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) [2022-11-18 19:38:21,137 INFO L276 IsEmpty]: Start isEmpty. Operand 262949 states and 298468 transitions. [2022-11-18 19:38:21,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1057 [2022-11-18 19:38:21,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:21,155 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:21,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:21,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a9564cd-9c30-4730-b279-1825b6467807/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 19:38:21,363 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:38:21,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:21,363 INFO L85 PathProgramCache]: Analyzing trace with hash 669034572, now seen corresponding path program 1 times [2022-11-18 19:38:21,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:21,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551957809] [2022-11-18 19:38:21,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:21,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 574 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-18 19:38:22,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:22,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551957809] [2022-11-18 19:38:22,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551957809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:38:22,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:38:22,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:38:22,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814760523] [2022-11-18 19:38:22,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:38:22,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:38:22,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:22,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:38:22,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:38:22,988 INFO L87 Difference]: Start difference. First operand 262949 states and 298468 transitions. Second operand has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 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) [2022-11-18 19:38:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:33,808 INFO L93 Difference]: Finished difference Result 524541 states and 595582 transitions. [2022-11-18 19:38:33,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:38:33,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 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 1056 [2022-11-18 19:38:33,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:34,193 INFO L225 Difference]: With dead ends: 524541 [2022-11-18 19:38:34,193 INFO L226 Difference]: Without dead ends: 262959 [2022-11-18 19:38:34,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:38:34,302 INFO L413 NwaCegarLoop]: 2875 mSDtfsCounter, 1218 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 4424 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 3070 SdHoareTripleChecker+Invalid, 4822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 4424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:34,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1218 Valid, 3070 Invalid, 4822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 4424 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2022-11-18 19:38:35,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262959 states. [2022-11-18 19:38:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262959 to 262947. [2022-11-18 19:38:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262947 states, 262946 states have (on average 1.1209297726529401) internal successors, (294744), 262946 states have internal predecessors, (294744), 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) [2022-11-18 19:38:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262947 states to 262947 states and 294744 transitions. [2022-11-18 19:38:38,881 INFO L78 Accepts]: Start accepts. Automaton has 262947 states and 294744 transitions. Word has length 1056 [2022-11-18 19:38:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:38,882 INFO L495 AbstractCegarLoop]: Abstraction has 262947 states and 294744 transitions. [2022-11-18 19:38:38,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 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) [2022-11-18 19:38:38,882 INFO L276 IsEmpty]: Start isEmpty. Operand 262947 states and 294744 transitions. [2022-11-18 19:38:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2022-11-18 19:38:38,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:38,904 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:38,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 19:38:38,905 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 19:38:38,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:38,906 INFO L85 PathProgramCache]: Analyzing trace with hash -894592006, now seen corresponding path program 1 times [2022-11-18 19:38:38,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:38,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828277502] [2022-11-18 19:38:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:38,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 798 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-11-18 19:38:40,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:40,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828277502] [2022-11-18 19:38:40,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828277502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:38:40,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:38:40,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:38:40,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966037881] [2022-11-18 19:38:40,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:38:40,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:38:40,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:40,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:38:40,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:38:40,299 INFO L87 Difference]: Start difference. First operand 262947 states and 294744 transitions. Second operand has 4 states, 4 states have (on average 191.5) internal successors, (766), 4 states have internal predecessors, (766), 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)