./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label41.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_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/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_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label41.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/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_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/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 ee947e38812a78047df5e0d4c922466fc041cf3c45dbdc3424cead9945ce22c5 --- 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 18:32:31,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:32:31,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:32:31,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:32:31,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:32:31,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:32:31,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:32:31,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:32:31,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:32:31,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:32:31,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:32:31,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:32:31,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:32:31,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:32:31,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:32:31,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:32:31,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:32:31,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:32:31,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:32:31,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:32:31,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:32:31,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:32:31,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:32:31,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:32:31,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:32:31,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:32:31,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:32:31,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:32:31,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:32:31,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:32:31,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:32:31,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:32:31,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:32:31,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:32:31,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:32:31,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:32:31,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:32:31,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:32:31,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:32:31,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:32:31,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:32:31,353 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:32:31,395 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:32:31,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:32:31,396 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:32:31,397 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:32:31,397 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:32:31,398 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:32:31,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:32:31,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:32:31,399 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:32:31,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:32:31,400 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:32:31,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:32:31,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:32:31,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:32:31,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:32:31,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:32:31,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:32:31,401 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:32:31,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:32:31,401 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:32:31,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:32:31,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:32:31,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:32:31,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:32:31,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:32:31,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:32:31,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:32:31,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:32:31,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:32:31,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:32:31,405 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:32:31,405 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:32:31,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:32:31,406 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_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee947e38812a78047df5e0d4c922466fc041cf3c45dbdc3424cead9945ce22c5 [2022-11-18 18:32:31,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:32:31,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:32:31,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:32:31,783 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:32:31,784 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:32:31,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/eca-rers2012/Problem03_label41.c [2022-11-18 18:32:31,888 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/data/ba2d36267/3b0204dd52b642718e752dfb64475820/FLAGb18e89421 [2022-11-18 18:32:32,648 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:32:32,649 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/sv-benchmarks/c/eca-rers2012/Problem03_label41.c [2022-11-18 18:32:32,668 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/data/ba2d36267/3b0204dd52b642718e752dfb64475820/FLAGb18e89421 [2022-11-18 18:32:32,835 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/data/ba2d36267/3b0204dd52b642718e752dfb64475820 [2022-11-18 18:32:32,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:32:32,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:32:32,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:32:32,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:32:32,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:32:32,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:32:32" (1/1) ... [2022-11-18 18:32:32,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fdb90c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:32:32, skipping insertion in model container [2022-11-18 18:32:32,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:32:32" (1/1) ... [2022-11-18 18:32:32,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:32:32,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:32:33,577 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_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/sv-benchmarks/c/eca-rers2012/Problem03_label41.c[58800,58813] [2022-11-18 18:32:33,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:32:33,609 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:32:33,935 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_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/sv-benchmarks/c/eca-rers2012/Problem03_label41.c[58800,58813] [2022-11-18 18:32:33,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:32:33,968 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:32:33,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:32:33 WrapperNode [2022-11-18 18:32:33,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:32:33,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:32:33,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:32:33,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:32:33,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:32:33" (1/1) ... [2022-11-18 18:32:34,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:32:33" (1/1) ... [2022-11-18 18:32:34,124 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-18 18:32:34,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:32:34,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:32:34,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:32:34,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:32:34,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:32:33" (1/1) ... [2022-11-18 18:32:34,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:32:33" (1/1) ... [2022-11-18 18:32:34,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:32:33" (1/1) ... [2022-11-18 18:32:34,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:32:33" (1/1) ... [2022-11-18 18:32:34,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:32:33" (1/1) ... [2022-11-18 18:32:34,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:32:33" (1/1) ... [2022-11-18 18:32:34,212 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:32:33" (1/1) ... [2022-11-18 18:32:34,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:32:33" (1/1) ... [2022-11-18 18:32:34,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:32:34,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:32:34,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:32:34,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:32:34,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:32:33" (1/1) ... [2022-11-18 18:32:34,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:32:34,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:34,318 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:32:34,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:32:34,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:32:34,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:32:34,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:32:34,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:32:34,536 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:32:34,539 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:32:36,587 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:32:36,598 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:32:36,599 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 18:32:36,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:32:36 BoogieIcfgContainer [2022-11-18 18:32:36,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:32:36,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:32:36,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:32:36,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:32:36,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:32:32" (1/3) ... [2022-11-18 18:32:36,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172a51df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:32:36, skipping insertion in model container [2022-11-18 18:32:36,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:32:33" (2/3) ... [2022-11-18 18:32:36,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172a51df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:32:36, skipping insertion in model container [2022-11-18 18:32:36,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:32:36" (3/3) ... [2022-11-18 18:32:36,611 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label41.c [2022-11-18 18:32:36,632 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:32:36,633 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:32:36,695 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:32:36,702 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;@bdc301a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:32:36,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 18:32:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 18:32:36,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-18 18:32:36,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:32:36,724 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:36,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:32:36,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:36,731 INFO L85 PathProgramCache]: Analyzing trace with hash 666295290, now seen corresponding path program 1 times [2022-11-18 18:32:36,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:36,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848745214] [2022-11-18 18:32:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:36,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:37,456 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 18:32:37,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:37,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848745214] [2022-11-18 18:32:37,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848745214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:37,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:32:37,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:32:37,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800550831] [2022-11-18 18:32:37,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:37,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:32:37,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:37,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:32:37,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:32:37,500 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 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 18:32:38,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:32:38,942 INFO L93 Difference]: Finished difference Result 829 states and 1478 transitions. [2022-11-18 18:32:38,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:32:38,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 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 182 [2022-11-18 18:32:38,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:32:38,962 INFO L225 Difference]: With dead ends: 829 [2022-11-18 18:32:38,966 INFO L226 Difference]: Without dead ends: 463 [2022-11-18 18:32:38,975 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 18:32:38,981 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 109 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:32:38,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 127 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-18 18:32:39,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-18 18:32:39,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 449. [2022-11-18 18:32:39,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.6183035714285714) internal successors, (725), 448 states have internal predecessors, (725), 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 18:32:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 725 transitions. [2022-11-18 18:32:39,068 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 725 transitions. Word has length 182 [2022-11-18 18:32:39,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:32:39,069 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 725 transitions. [2022-11-18 18:32:39,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 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 18:32:39,070 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 725 transitions. [2022-11-18 18:32:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-11-18 18:32:39,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:32:39,075 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 18:32:39,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:32:39,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:32:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1747605302, now seen corresponding path program 1 times [2022-11-18 18:32:39,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:39,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251803316] [2022-11-18 18:32:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:39,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:39,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:39,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251803316] [2022-11-18 18:32:39,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251803316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:39,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:32:39,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:32:39,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944423011] [2022-11-18 18:32:39,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:39,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:32:39,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:39,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:32:39,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:32:39,584 INFO L87 Difference]: Start difference. First operand 449 states and 725 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 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 18:32:40,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:32:40,645 INFO L93 Difference]: Finished difference Result 1321 states and 2139 transitions. [2022-11-18 18:32:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:32:40,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 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 187 [2022-11-18 18:32:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:32:40,651 INFO L225 Difference]: With dead ends: 1321 [2022-11-18 18:32:40,651 INFO L226 Difference]: Without dead ends: 874 [2022-11-18 18:32:40,653 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 18:32:40,654 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:32:40,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 149 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 18:32:40,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-11-18 18:32:40,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 870. [2022-11-18 18:32:40,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5132336018411967) internal successors, (1315), 869 states have internal predecessors, (1315), 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 18:32:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1315 transitions. [2022-11-18 18:32:40,710 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1315 transitions. Word has length 187 [2022-11-18 18:32:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:32:40,710 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1315 transitions. [2022-11-18 18:32:40,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 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 18:32:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1315 transitions. [2022-11-18 18:32:40,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-11-18 18:32:40,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:32:40,726 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:40,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:32:40,727 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:32:40,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:40,728 INFO L85 PathProgramCache]: Analyzing trace with hash -744971163, now seen corresponding path program 1 times [2022-11-18 18:32:40,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:40,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632868733] [2022-11-18 18:32:40,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:40,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:41,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:41,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632868733] [2022-11-18 18:32:41,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632868733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:32:41,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433571089] [2022-11-18 18:32:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:41,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:41,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:41,354 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:32:41,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:32:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 18:32:41,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 18:32:41,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:32:41,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433571089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:41,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:32:41,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-18 18:32:41,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642769960] [2022-11-18 18:32:41,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:41,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:32:41,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:41,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:32:41,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:32:41,955 INFO L87 Difference]: Start difference. First operand 870 states and 1315 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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 18:32:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:32:42,888 INFO L93 Difference]: Finished difference Result 2575 states and 3906 transitions. [2022-11-18 18:32:42,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:32:42,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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 189 [2022-11-18 18:32:42,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:32:42,897 INFO L225 Difference]: With dead ends: 2575 [2022-11-18 18:32:42,897 INFO L226 Difference]: Without dead ends: 1707 [2022-11-18 18:32:42,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 188 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 18:32:42,902 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 88 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:32:42,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 176 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 18:32:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2022-11-18 18:32:42,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1700. [2022-11-18 18:32:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 1.4484991171277222) internal successors, (2461), 1699 states have internal predecessors, (2461), 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 18:32:42,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2461 transitions. [2022-11-18 18:32:42,950 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2461 transitions. Word has length 189 [2022-11-18 18:32:42,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:32:42,951 INFO L495 AbstractCegarLoop]: Abstraction has 1700 states and 2461 transitions. [2022-11-18 18:32:42,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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 18:32:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2461 transitions. [2022-11-18 18:32:42,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-18 18:32:42,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:32:42,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:42,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 18:32:43,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:43,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:32:43,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:43,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1680874293, now seen corresponding path program 1 times [2022-11-18 18:32:43,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:43,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259098757] [2022-11-18 18:32:43,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:43,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 18:32:43,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:43,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259098757] [2022-11-18 18:32:43,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259098757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:43,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:32:43,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:32:43,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872070833] [2022-11-18 18:32:43,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:43,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:32:43,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:43,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:32:43,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:32:43,668 INFO L87 Difference]: Start difference. First operand 1700 states and 2461 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 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 18:32:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:32:44,748 INFO L93 Difference]: Finished difference Result 4226 states and 6097 transitions. [2022-11-18 18:32:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:32:44,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 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 199 [2022-11-18 18:32:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:32:44,760 INFO L225 Difference]: With dead ends: 4226 [2022-11-18 18:32:44,761 INFO L226 Difference]: Without dead ends: 2528 [2022-11-18 18:32:44,764 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 18:32:44,773 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 234 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:32:44,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 115 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 18:32:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2022-11-18 18:32:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2527. [2022-11-18 18:32:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2527 states, 2526 states have (on average 1.4180522565320666) internal successors, (3582), 2526 states have internal predecessors, (3582), 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 18:32:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2527 states to 2527 states and 3582 transitions. [2022-11-18 18:32:44,844 INFO L78 Accepts]: Start accepts. Automaton has 2527 states and 3582 transitions. Word has length 199 [2022-11-18 18:32:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:32:44,845 INFO L495 AbstractCegarLoop]: Abstraction has 2527 states and 3582 transitions. [2022-11-18 18:32:44,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 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 18:32:44,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2527 states and 3582 transitions. [2022-11-18 18:32:44,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-18 18:32:44,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:32:44,851 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:44,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:32:44,852 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:32:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:44,853 INFO L85 PathProgramCache]: Analyzing trace with hash 80970048, now seen corresponding path program 1 times [2022-11-18 18:32:44,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:44,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223070913] [2022-11-18 18:32:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:44,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 18:32:45,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:45,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223070913] [2022-11-18 18:32:45,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223070913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:45,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:32:45,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:32:45,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094341631] [2022-11-18 18:32:45,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:45,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:32:45,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:45,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:32:45,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:32:45,155 INFO L87 Difference]: Start difference. First operand 2527 states and 3582 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 18:32:46,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:32:46,237 INFO L93 Difference]: Finished difference Result 7492 states and 10627 transitions. [2022-11-18 18:32:46,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:32:46,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 202 [2022-11-18 18:32:46,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:32:46,254 INFO L225 Difference]: With dead ends: 7492 [2022-11-18 18:32:46,254 INFO L226 Difference]: Without dead ends: 4967 [2022-11-18 18:32:46,258 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 18:32:46,258 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 227 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:32:46,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 422 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 18:32:46,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4967 states. [2022-11-18 18:32:46,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4967 to 4965. [2022-11-18 18:32:46,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4965 states, 4964 states have (on average 1.266921837228042) internal successors, (6289), 4964 states have internal predecessors, (6289), 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 18:32:46,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 6289 transitions. [2022-11-18 18:32:46,373 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 6289 transitions. Word has length 202 [2022-11-18 18:32:46,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:32:46,374 INFO L495 AbstractCegarLoop]: Abstraction has 4965 states and 6289 transitions. [2022-11-18 18:32:46,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 18:32:46,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 6289 transitions. [2022-11-18 18:32:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-18 18:32:46,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:32:46,383 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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] [2022-11-18 18:32:46,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 18:32:46,384 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:32:46,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:46,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1985224, now seen corresponding path program 1 times [2022-11-18 18:32:46,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:46,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101218651] [2022-11-18 18:32:46,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:46,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 18:32:47,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:47,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101218651] [2022-11-18 18:32:47,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101218651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:32:47,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666733295] [2022-11-18 18:32:47,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:47,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:47,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:47,099 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:32:47,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:32:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:47,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 18:32:47,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 18:32:47,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:32:47,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666733295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:47,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:32:47,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-18 18:32:47,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501115368] [2022-11-18 18:32:47,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:47,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:32:47,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:47,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:32:47,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:32:47,433 INFO L87 Difference]: Start difference. First operand 4965 states and 6289 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 18:32:48,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:32:48,548 INFO L93 Difference]: Finished difference Result 14626 states and 18562 transitions. [2022-11-18 18:32:48,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:32:48,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 216 [2022-11-18 18:32:48,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:32:48,578 INFO L225 Difference]: With dead ends: 14626 [2022-11-18 18:32:48,579 INFO L226 Difference]: Without dead ends: 9663 [2022-11-18 18:32:48,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 215 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 18:32:48,586 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 242 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:32:48,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 178 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 18:32:48,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9663 states. [2022-11-18 18:32:48,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9663 to 9662. [2022-11-18 18:32:48,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9662 states, 9661 states have (on average 1.231239002173688) internal successors, (11895), 9661 states have internal predecessors, (11895), 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 18:32:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9662 states to 9662 states and 11895 transitions. [2022-11-18 18:32:48,804 INFO L78 Accepts]: Start accepts. Automaton has 9662 states and 11895 transitions. Word has length 216 [2022-11-18 18:32:48,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:32:48,804 INFO L495 AbstractCegarLoop]: Abstraction has 9662 states and 11895 transitions. [2022-11-18 18:32:48,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 18:32:48,805 INFO L276 IsEmpty]: Start isEmpty. Operand 9662 states and 11895 transitions. [2022-11-18 18:32:48,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-18 18:32:48,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:32:48,821 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:48,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 18:32:49,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 18:32:49,031 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:32:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:49,032 INFO L85 PathProgramCache]: Analyzing trace with hash 266733374, now seen corresponding path program 1 times [2022-11-18 18:32:49,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:49,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801234756] [2022-11-18 18:32:49,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:49,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:49,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:49,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801234756] [2022-11-18 18:32:49,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801234756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:32:49,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396628700] [2022-11-18 18:32:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:49,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:49,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:49,780 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:32:49,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:32:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:50,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 18:32:50,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 18:32:50,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:32:50,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396628700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:50,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:32:50,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-18 18:32:50,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020876399] [2022-11-18 18:32:50,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:50,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:32:50,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:50,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:32:50,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:32:50,321 INFO L87 Difference]: Start difference. First operand 9662 states and 11895 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 18:32:51,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:32:51,441 INFO L93 Difference]: Finished difference Result 27895 states and 34477 transitions. [2022-11-18 18:32:51,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:32:51,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 230 [2022-11-18 18:32:51,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:32:51,518 INFO L225 Difference]: With dead ends: 27895 [2022-11-18 18:32:51,518 INFO L226 Difference]: Without dead ends: 18235 [2022-11-18 18:32:51,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 229 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 18:32:51,533 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 63 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:32:51,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 172 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 18:32:51,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18235 states. [2022-11-18 18:32:51,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18235 to 15155. [2022-11-18 18:32:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15155 states, 15154 states have (on average 1.2605912630328626) internal successors, (19103), 15154 states have internal predecessors, (19103), 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 18:32:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15155 states to 15155 states and 19103 transitions. [2022-11-18 18:32:51,891 INFO L78 Accepts]: Start accepts. Automaton has 15155 states and 19103 transitions. Word has length 230 [2022-11-18 18:32:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:32:51,892 INFO L495 AbstractCegarLoop]: Abstraction has 15155 states and 19103 transitions. [2022-11-18 18:32:51,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 18:32:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 15155 states and 19103 transitions. [2022-11-18 18:32:51,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-11-18 18:32:51,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:32:51,918 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:51,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:32:52,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:52,124 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:32:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:52,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1875026290, now seen corresponding path program 1 times [2022-11-18 18:32:52,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:52,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290901094] [2022-11-18 18:32:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:52,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-18 18:32:52,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:52,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290901094] [2022-11-18 18:32:52,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290901094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:52,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:32:52,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:32:52,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923374000] [2022-11-18 18:32:52,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:52,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:32:52,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:52,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:32:52,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:32:52,409 INFO L87 Difference]: Start difference. First operand 15155 states and 19103 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 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 18:32:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:32:52,927 INFO L93 Difference]: Finished difference Result 45005 states and 56784 transitions. [2022-11-18 18:32:52,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:32:52,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 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 244 [2022-11-18 18:32:52,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:32:52,989 INFO L225 Difference]: With dead ends: 45005 [2022-11-18 18:32:52,989 INFO L226 Difference]: Without dead ends: 29852 [2022-11-18 18:32:53,007 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 18:32:53,008 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 323 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:32:53,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 541 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:32:53,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29852 states. [2022-11-18 18:32:53,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29852 to 29850. [2022-11-18 18:32:53,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29850 states, 29849 states have (on average 1.261616804583068) internal successors, (37658), 29849 states have internal predecessors, (37658), 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 18:32:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29850 states to 29850 states and 37658 transitions. [2022-11-18 18:32:53,571 INFO L78 Accepts]: Start accepts. Automaton has 29850 states and 37658 transitions. Word has length 244 [2022-11-18 18:32:53,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:32:53,575 INFO L495 AbstractCegarLoop]: Abstraction has 29850 states and 37658 transitions. [2022-11-18 18:32:53,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 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 18:32:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 29850 states and 37658 transitions. [2022-11-18 18:32:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-11-18 18:32:53,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:32:53,613 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:53,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 18:32:53,613 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:32:53,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:53,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1827544513, now seen corresponding path program 1 times [2022-11-18 18:32:53,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:53,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986199158] [2022-11-18 18:32:53,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:53,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 18:32:54,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:54,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986199158] [2022-11-18 18:32:54,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986199158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:32:54,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437476965] [2022-11-18 18:32:54,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:54,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:54,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:54,405 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:32:54,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:32:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:54,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 18:32:54,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-18 18:32:54,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:32:54,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437476965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:54,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:32:54,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-18 18:32:54,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695277936] [2022-11-18 18:32:54,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:54,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:32:54,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:54,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:32:54,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:32:54,687 INFO L87 Difference]: Start difference. First operand 29850 states and 37658 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 18:32:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:32:56,115 INFO L93 Difference]: Finished difference Result 77568 states and 99450 transitions. [2022-11-18 18:32:56,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:32:56,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 247 [2022-11-18 18:32:56,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:32:56,222 INFO L225 Difference]: With dead ends: 77568 [2022-11-18 18:32:56,223 INFO L226 Difference]: Without dead ends: 47720 [2022-11-18 18:32:56,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 246 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 18:32:56,443 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 233 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:32:56,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 419 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 18:32:56,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47720 states. [2022-11-18 18:32:57,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47720 to 44466. [2022-11-18 18:32:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44466 states, 44465 states have (on average 1.2759698639379287) internal successors, (56736), 44465 states have internal predecessors, (56736), 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 18:32:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44466 states to 44466 states and 56736 transitions. [2022-11-18 18:32:57,410 INFO L78 Accepts]: Start accepts. Automaton has 44466 states and 56736 transitions. Word has length 247 [2022-11-18 18:32:57,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:32:57,410 INFO L495 AbstractCegarLoop]: Abstraction has 44466 states and 56736 transitions. [2022-11-18 18:32:57,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 18:32:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 44466 states and 56736 transitions. [2022-11-18 18:32:57,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-11-18 18:32:57,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:32:57,494 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:32:57,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 18:32:57,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:57,700 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:32:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:57,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1218108711, now seen corresponding path program 1 times [2022-11-18 18:32:57,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:57,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961948539] [2022-11-18 18:32:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:57,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 76 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 18:32:58,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:58,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961948539] [2022-11-18 18:32:58,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961948539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:32:58,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073004826] [2022-11-18 18:32:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:58,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:58,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:58,601 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:32:58,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:32:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:58,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 18:32:58,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 18:32:58,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:32:58,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073004826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:58,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:32:58,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-18 18:32:58,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180396726] [2022-11-18 18:32:58,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:58,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:32:58,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:58,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:32:58,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:32:58,937 INFO L87 Difference]: Start difference. First operand 44466 states and 56736 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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 18:33:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:00,479 INFO L93 Difference]: Finished difference Result 88733 states and 113226 transitions. [2022-11-18 18:33:00,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:00,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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 253 [2022-11-18 18:33:00,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:00,585 INFO L225 Difference]: With dead ends: 88733 [2022-11-18 18:33:00,585 INFO L226 Difference]: Without dead ends: 44269 [2022-11-18 18:33:00,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 252 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 18:33:00,619 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 224 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:00,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 166 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 18:33:00,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44269 states. [2022-11-18 18:33:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44269 to 44263. [2022-11-18 18:33:01,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44263 states, 44262 states have (on average 1.187067913786092) internal successors, (52542), 44262 states have internal predecessors, (52542), 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 18:33:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44263 states to 44263 states and 52542 transitions. [2022-11-18 18:33:01,649 INFO L78 Accepts]: Start accepts. Automaton has 44263 states and 52542 transitions. Word has length 253 [2022-11-18 18:33:01,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:01,649 INFO L495 AbstractCegarLoop]: Abstraction has 44263 states and 52542 transitions. [2022-11-18 18:33:01,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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 18:33:01,650 INFO L276 IsEmpty]: Start isEmpty. Operand 44263 states and 52542 transitions. [2022-11-18 18:33:01,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-11-18 18:33:01,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:01,700 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-11-18 18:33:01,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:01,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 18:33:01,907 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:01,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:01,908 INFO L85 PathProgramCache]: Analyzing trace with hash 152110199, now seen corresponding path program 1 times [2022-11-18 18:33:01,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:01,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700565574] [2022-11-18 18:33:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:01,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:02,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 90 proven. 6 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-18 18:33:02,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:02,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700565574] [2022-11-18 18:33:02,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700565574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:02,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906514400] [2022-11-18 18:33:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:02,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:02,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:02,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:02,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:33:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:02,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:33:02,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-18 18:33:02,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:33:02,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906514400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:02,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:33:02,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-18 18:33:02,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081799967] [2022-11-18 18:33:02,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:02,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:33:02,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:02,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:33:02,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:33:02,906 INFO L87 Difference]: Start difference. First operand 44263 states and 52542 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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 18:33:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:03,656 INFO L93 Difference]: Finished difference Result 87644 states and 103952 transitions. [2022-11-18 18:33:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:03,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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 263 [2022-11-18 18:33:03,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:03,721 INFO L225 Difference]: With dead ends: 87644 [2022-11-18 18:33:03,721 INFO L226 Difference]: Without dead ends: 43383 [2022-11-18 18:33:03,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 262 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 18:33:03,747 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 308 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:03,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 18:33:03,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43383 states. [2022-11-18 18:33:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43383 to 43383. [2022-11-18 18:33:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43383 states, 43382 states have (on average 1.1720529251763405) internal successors, (50846), 43382 states have internal predecessors, (50846), 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 18:33:04,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43383 states to 43383 states and 50846 transitions. [2022-11-18 18:33:04,707 INFO L78 Accepts]: Start accepts. Automaton has 43383 states and 50846 transitions. Word has length 263 [2022-11-18 18:33:04,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:04,708 INFO L495 AbstractCegarLoop]: Abstraction has 43383 states and 50846 transitions. [2022-11-18 18:33:04,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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 18:33:04,708 INFO L276 IsEmpty]: Start isEmpty. Operand 43383 states and 50846 transitions. [2022-11-18 18:33:04,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-11-18 18:33:04,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:04,747 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:33:04,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:04,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 18:33:04,954 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:04,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:04,954 INFO L85 PathProgramCache]: Analyzing trace with hash 110153896, now seen corresponding path program 1 times [2022-11-18 18:33:04,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:04,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678384481] [2022-11-18 18:33:04,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:04,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:05,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:05,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678384481] [2022-11-18 18:33:05,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678384481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:05,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:05,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:33:05,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648368562] [2022-11-18 18:33:05,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:05,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:33:05,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:05,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:33:05,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:33:05,398 INFO L87 Difference]: Start difference. First operand 43383 states and 50846 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 18:33:06,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:06,584 INFO L93 Difference]: Finished difference Result 83906 states and 98204 transitions. [2022-11-18 18:33:06,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:06,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 301 [2022-11-18 18:33:06,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:06,628 INFO L225 Difference]: With dead ends: 83906 [2022-11-18 18:33:06,628 INFO L226 Difference]: Without dead ends: 40525 [2022-11-18 18:33:06,651 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 18:33:06,652 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 226 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:06,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 320 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 18:33:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40525 states. [2022-11-18 18:33:07,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40525 to 33812. [2022-11-18 18:33:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33812 states, 33811 states have (on average 1.1363461595338795) internal successors, (38421), 33811 states have internal predecessors, (38421), 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 18:33:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33812 states to 33812 states and 38421 transitions. [2022-11-18 18:33:07,313 INFO L78 Accepts]: Start accepts. Automaton has 33812 states and 38421 transitions. Word has length 301 [2022-11-18 18:33:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:07,313 INFO L495 AbstractCegarLoop]: Abstraction has 33812 states and 38421 transitions. [2022-11-18 18:33:07,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 18:33:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 33812 states and 38421 transitions. [2022-11-18 18:33:07,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-11-18 18:33:07,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:07,355 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:33:07,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 18:33:07,356 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:07,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2088840202, now seen corresponding path program 1 times [2022-11-18 18:33:07,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:07,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619757090] [2022-11-18 18:33:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:07,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 148 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 18:33:08,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:08,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619757090] [2022-11-18 18:33:08,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619757090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:08,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365024612] [2022-11-18 18:33:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:08,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:08,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:08,390 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:08,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:33:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:08,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:33:08,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-18 18:33:08,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:33:08,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365024612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:08,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:33:08,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-18 18:33:08,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851548417] [2022-11-18 18:33:08,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:08,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:33:08,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:08,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:33:08,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:33:08,922 INFO L87 Difference]: Start difference. First operand 33812 states and 38421 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 2 states have internal predecessors, (321), 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 18:33:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:09,549 INFO L93 Difference]: Finished difference Result 87163 states and 98992 transitions. [2022-11-18 18:33:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:09,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 2 states have internal predecessors, (321), 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 333 [2022-11-18 18:33:09,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:09,602 INFO L225 Difference]: With dead ends: 87163 [2022-11-18 18:33:09,602 INFO L226 Difference]: Without dead ends: 53353 [2022-11-18 18:33:09,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 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 18:33:09,627 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 192 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:09,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 439 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 18:33:09,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53353 states. [2022-11-18 18:33:10,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53353 to 53351. [2022-11-18 18:33:10,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53351 states, 53350 states have (on average 1.1349015932521087) internal successors, (60547), 53350 states have internal predecessors, (60547), 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 18:33:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53351 states to 53351 states and 60547 transitions. [2022-11-18 18:33:10,451 INFO L78 Accepts]: Start accepts. Automaton has 53351 states and 60547 transitions. Word has length 333 [2022-11-18 18:33:10,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:10,452 INFO L495 AbstractCegarLoop]: Abstraction has 53351 states and 60547 transitions. [2022-11-18 18:33:10,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 2 states have internal predecessors, (321), 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 18:33:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 53351 states and 60547 transitions. [2022-11-18 18:33:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-11-18 18:33:10,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:10,492 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:33:10,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:10,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 18:33:10,694 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:10,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1021410080, now seen corresponding path program 1 times [2022-11-18 18:33:10,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:10,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631078414] [2022-11-18 18:33:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:10,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-18 18:33:11,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:11,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631078414] [2022-11-18 18:33:11,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631078414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:11,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:11,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:33:11,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843464086] [2022-11-18 18:33:11,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:11,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:33:11,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:11,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:33:11,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:33:11,030 INFO L87 Difference]: Start difference. First operand 53351 states and 60547 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 18:33:12,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:12,471 INFO L93 Difference]: Finished difference Result 100554 states and 113942 transitions. [2022-11-18 18:33:12,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:12,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 342 [2022-11-18 18:33:12,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:12,517 INFO L225 Difference]: With dead ends: 100554 [2022-11-18 18:33:12,517 INFO L226 Difference]: Without dead ends: 47205 [2022-11-18 18:33:12,545 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 18:33:12,547 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 245 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:12,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 333 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 18:33:12,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47205 states. [2022-11-18 18:33:13,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47205 to 44564. [2022-11-18 18:33:13,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44564 states, 44563 states have (on average 1.1080717186903934) internal successors, (49379), 44563 states have internal predecessors, (49379), 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 18:33:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44564 states to 44564 states and 49379 transitions. [2022-11-18 18:33:13,248 INFO L78 Accepts]: Start accepts. Automaton has 44564 states and 49379 transitions. Word has length 342 [2022-11-18 18:33:13,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:13,248 INFO L495 AbstractCegarLoop]: Abstraction has 44564 states and 49379 transitions. [2022-11-18 18:33:13,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 18:33:13,249 INFO L276 IsEmpty]: Start isEmpty. Operand 44564 states and 49379 transitions. [2022-11-18 18:33:13,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-11-18 18:33:13,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:13,277 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:33:13,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 18:33:13,277 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:13,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:13,278 INFO L85 PathProgramCache]: Analyzing trace with hash -215360594, now seen corresponding path program 1 times [2022-11-18 18:33:13,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:13,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290479840] [2022-11-18 18:33:13,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:13,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 249 proven. 12 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-18 18:33:14,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:14,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290479840] [2022-11-18 18:33:14,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290479840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:14,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418052148] [2022-11-18 18:33:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:14,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:14,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:14,211 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:14,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:33:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:14,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 18:33:14,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 291 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-18 18:33:14,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:33:14,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418052148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:14,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:33:14,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-18 18:33:14,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106001928] [2022-11-18 18:33:14,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:14,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:33:14,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:14,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:33:14,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:33:14,607 INFO L87 Difference]: Start difference. First operand 44564 states and 49379 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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 18:33:15,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:15,518 INFO L93 Difference]: Finished difference Result 116976 states and 129439 transitions. [2022-11-18 18:33:15,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:15,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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 437 [2022-11-18 18:33:15,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:15,601 INFO L225 Difference]: With dead ends: 116976 [2022-11-18 18:33:15,601 INFO L226 Difference]: Without dead ends: 72414 [2022-11-18 18:33:15,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:33:15,629 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 273 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:15,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 798 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 18:33:15,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72414 states. [2022-11-18 18:33:16,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72414 to 72412. [2022-11-18 18:33:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72412 states, 72411 states have (on average 1.096767065777299) internal successors, (79418), 72411 states have internal predecessors, (79418), 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 18:33:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72412 states to 72412 states and 79418 transitions. [2022-11-18 18:33:16,629 INFO L78 Accepts]: Start accepts. Automaton has 72412 states and 79418 transitions. Word has length 437 [2022-11-18 18:33:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:16,630 INFO L495 AbstractCegarLoop]: Abstraction has 72412 states and 79418 transitions. [2022-11-18 18:33:16,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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 18:33:16,630 INFO L276 IsEmpty]: Start isEmpty. Operand 72412 states and 79418 transitions. [2022-11-18 18:33:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-11-18 18:33:16,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:16,677 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:33:16,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:16,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:33:16,879 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:16,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1173208189, now seen corresponding path program 1 times [2022-11-18 18:33:16,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:16,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914139189] [2022-11-18 18:33:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:16,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 262 proven. 12 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-11-18 18:33:17,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:17,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914139189] [2022-11-18 18:33:17,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914139189] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:17,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596687938] [2022-11-18 18:33:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:17,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:17,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:17,795 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:17,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:33:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:18,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 18:33:18,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-11-18 18:33:18,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:33:18,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596687938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:18,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:33:18,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-18 18:33:18,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707765096] [2022-11-18 18:33:18,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:18,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:33:18,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:18,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:33:18,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:33:18,133 INFO L87 Difference]: Start difference. First operand 72412 states and 79418 transitions. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 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 18:33:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:19,568 INFO L93 Difference]: Finished difference Result 149111 states and 163491 transitions. [2022-11-18 18:33:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:19,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 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 446 [2022-11-18 18:33:19,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:19,636 INFO L225 Difference]: With dead ends: 149111 [2022-11-18 18:33:19,636 INFO L226 Difference]: Without dead ends: 76701 [2022-11-18 18:33:19,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:33:19,665 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 208 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:19,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 354 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 18:33:19,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76701 states. [2022-11-18 18:33:20,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76701 to 74239. [2022-11-18 18:33:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74239 states, 74238 states have (on average 1.0920552816616826) internal successors, (81072), 74238 states have internal predecessors, (81072), 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 18:33:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74239 states to 74239 states and 81072 transitions. [2022-11-18 18:33:20,740 INFO L78 Accepts]: Start accepts. Automaton has 74239 states and 81072 transitions. Word has length 446 [2022-11-18 18:33:20,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:20,741 INFO L495 AbstractCegarLoop]: Abstraction has 74239 states and 81072 transitions. [2022-11-18 18:33:20,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 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 18:33:20,741 INFO L276 IsEmpty]: Start isEmpty. Operand 74239 states and 81072 transitions. [2022-11-18 18:33:20,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2022-11-18 18:33:20,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:20,854 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-18 18:33:20,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:21,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 18:33:21,060 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:21,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:21,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1475759949, now seen corresponding path program 1 times [2022-11-18 18:33:21,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:21,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469056181] [2022-11-18 18:33:21,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:21,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 253 proven. 12 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-11-18 18:33:22,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:22,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469056181] [2022-11-18 18:33:22,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469056181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:22,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873497299] [2022-11-18 18:33:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:22,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:22,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:22,474 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:22,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:33:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:22,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 18:33:22,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 414 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-18 18:33:23,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:33:23,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873497299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:23,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:33:23,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-18 18:33:23,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425033681] [2022-11-18 18:33:23,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:23,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:33:23,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:23,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:33:23,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:33:23,016 INFO L87 Difference]: Start difference. First operand 74239 states and 81072 transitions. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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 18:33:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:24,304 INFO L93 Difference]: Finished difference Result 148484 states and 162154 transitions. [2022-11-18 18:33:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:24,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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 459 [2022-11-18 18:33:24,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:24,367 INFO L225 Difference]: With dead ends: 148484 [2022-11-18 18:33:24,367 INFO L226 Difference]: Without dead ends: 74247 [2022-11-18 18:33:24,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 458 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 18:33:24,395 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 135 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:24,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 48 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 18:33:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74247 states. [2022-11-18 18:33:25,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74247 to 74239. [2022-11-18 18:33:25,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74239 states, 74238 states have (on average 1.0917724076618442) internal successors, (81051), 74238 states have internal predecessors, (81051), 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 18:33:25,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74239 states to 74239 states and 81051 transitions. [2022-11-18 18:33:25,249 INFO L78 Accepts]: Start accepts. Automaton has 74239 states and 81051 transitions. Word has length 459 [2022-11-18 18:33:25,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:25,250 INFO L495 AbstractCegarLoop]: Abstraction has 74239 states and 81051 transitions. [2022-11-18 18:33:25,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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 18:33:25,250 INFO L276 IsEmpty]: Start isEmpty. Operand 74239 states and 81051 transitions. [2022-11-18 18:33:25,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2022-11-18 18:33:25,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:25,304 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:33:25,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:25,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162f9aa7-dee6-4863-ae83-cc6b8e3ae7d3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:25,508 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:25,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1145734080, now seen corresponding path program 1 times [2022-11-18 18:33:25,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:25,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089267005] [2022-11-18 18:33:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:25,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-11-18 18:33:25,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:25,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089267005] [2022-11-18 18:33:25,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089267005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:25,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:25,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:33:25,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218072577] [2022-11-18 18:33:25,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:25,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:33:25,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:25,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:33:25,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:33:25,873 INFO L87 Difference]: Start difference. First operand 74239 states and 81051 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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 18:33:27,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:27,295 INFO L93 Difference]: Finished difference Result 212515 states and 232094 transitions. [2022-11-18 18:33:27,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:27,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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 465 [2022-11-18 18:33:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:27,464 INFO L225 Difference]: With dead ends: 212515 [2022-11-18 18:33:27,465 INFO L226 Difference]: Without dead ends: 138278 [2022-11-18 18:33:27,516 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 18:33:27,516 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 299 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:27,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 848 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:33:27,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138278 states. [2022-11-18 18:33:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138278 to 138067. [2022-11-18 18:33:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138067 states, 138066 states have (on average 1.0840974606347689) internal successors, (149677), 138066 states have internal predecessors, (149677), 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 18:33:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138067 states to 138067 states and 149677 transitions. [2022-11-18 18:33:29,818 INFO L78 Accepts]: Start accepts. Automaton has 138067 states and 149677 transitions. Word has length 465 [2022-11-18 18:33:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:29,818 INFO L495 AbstractCegarLoop]: Abstraction has 138067 states and 149677 transitions. [2022-11-18 18:33:29,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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 18:33:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 138067 states and 149677 transitions. [2022-11-18 18:33:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-11-18 18:33:29,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:29,943 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 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, 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] [2022-11-18 18:33:29,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 18:33:29,943 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:29,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:29,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1932792748, now seen corresponding path program 1 times [2022-11-18 18:33:29,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:29,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868576927] [2022-11-18 18:33:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:29,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-11-18 18:33:30,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:30,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868576927] [2022-11-18 18:33:30,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868576927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:30,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:30,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:33:30,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787118791] [2022-11-18 18:33:30,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:30,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:33:30,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:30,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:33:30,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:33:30,314 INFO L87 Difference]: Start difference. First operand 138067 states and 149677 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 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 18:33:32,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:32,517 INFO L93 Difference]: Finished difference Result 408099 states and 442589 transitions. [2022-11-18 18:33:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:33:32,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 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 478 [2022-11-18 18:33:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:32,864 INFO L225 Difference]: With dead ends: 408099 [2022-11-18 18:33:32,864 INFO L226 Difference]: Without dead ends: 270034 [2022-11-18 18:33:32,932 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 18:33:32,933 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 220 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:32,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 738 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:33:33,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270034 states. [2022-11-18 18:33:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270034 to 270028. [2022-11-18 18:33:36,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270028 states, 270027 states have (on average 1.0847248608472486) internal successors, (292905), 270027 states have internal predecessors, (292905), 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 18:33:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270028 states to 270028 states and 292905 transitions. [2022-11-18 18:33:37,184 INFO L78 Accepts]: Start accepts. Automaton has 270028 states and 292905 transitions. Word has length 478 [2022-11-18 18:33:37,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:37,184 INFO L495 AbstractCegarLoop]: Abstraction has 270028 states and 292905 transitions. [2022-11-18 18:33:37,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 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 18:33:37,185 INFO L276 IsEmpty]: Start isEmpty. Operand 270028 states and 292905 transitions. [2022-11-18 18:33:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2022-11-18 18:33:37,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:37,406 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:33:37,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-18 18:33:37,406 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:37,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:37,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1594211824, now seen corresponding path program 1 times [2022-11-18 18:33:37,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:37,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865603938] [2022-11-18 18:33:37,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:37,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat