./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 927c21c2096a228a934a41e2a18844ff0d670b1b365a7d276a4e36116ab9babc --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:06:46,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:06:46,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:06:46,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:06:46,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:06:46,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:06:46,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:06:46,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:06:46,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:06:46,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:06:46,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:06:46,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:06:46,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:06:46,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:06:46,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:06:46,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:06:46,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:06:46,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:06:46,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:06:46,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:06:46,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:06:46,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:06:46,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:06:46,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:06:46,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:06:46,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:06:46,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:06:46,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:06:46,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:06:46,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:06:46,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:06:46,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:06:46,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:06:46,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:06:46,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:06:46,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:06:46,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:06:46,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:06:46,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:06:46,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:06:46,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:06:46,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:06:46,308 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:06:46,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:06:46,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:06:46,310 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:06:46,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:06:46,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:06:46,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:06:46,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:06:46,312 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:06:46,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:06:46,313 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:06:46,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:06:46,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:06:46,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:06:46,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:06:46,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:06:46,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:06:46,315 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:06:46,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:06:46,315 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:06:46,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:06:46,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:06:46,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:06:46,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:06:46,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:06:46,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:06:46,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:06:46,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:06:46,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:06:46,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:06:46,318 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:06:46,318 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:06:46,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:06:46,319 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_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 927c21c2096a228a934a41e2a18844ff0d670b1b365a7d276a4e36116ab9babc [2022-11-16 12:06:46,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:06:46,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:06:46,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:06:46,634 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:06:46,635 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:06:46,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c [2022-11-16 12:06:46,707 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/data/f769aa775/a3e49147878a482ab3a07b4ae3a7d7cc/FLAGdca96e9dc [2022-11-16 12:06:47,315 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:06:47,316 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c [2022-11-16 12:06:47,324 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/data/f769aa775/a3e49147878a482ab3a07b4ae3a7d7cc/FLAGdca96e9dc [2022-11-16 12:06:47,719 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/data/f769aa775/a3e49147878a482ab3a07b4ae3a7d7cc [2022-11-16 12:06:47,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:06:47,724 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:06:47,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:06:47,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:06:47,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:06:47,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:06:47" (1/1) ... [2022-11-16 12:06:47,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@603a1839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:47, skipping insertion in model container [2022-11-16 12:06:47,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:06:47" (1/1) ... [2022-11-16 12:06:47,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:06:47,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:06:48,056 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c[9376,9389] [2022-11-16 12:06:48,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:06:48,072 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:06:48,121 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c[9376,9389] [2022-11-16 12:06:48,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:06:48,136 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:06:48,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:48 WrapperNode [2022-11-16 12:06:48,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:06:48,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:06:48,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:06:48,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:06:48,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:48" (1/1) ... [2022-11-16 12:06:48,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:48" (1/1) ... [2022-11-16 12:06:48,196 INFO L138 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 285 [2022-11-16 12:06:48,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:06:48,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:06:48,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:06:48,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:06:48,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:48" (1/1) ... [2022-11-16 12:06:48,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:48" (1/1) ... [2022-11-16 12:06:48,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:48" (1/1) ... [2022-11-16 12:06:48,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:48" (1/1) ... [2022-11-16 12:06:48,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:48" (1/1) ... [2022-11-16 12:06:48,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:48" (1/1) ... [2022-11-16 12:06:48,223 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:48" (1/1) ... [2022-11-16 12:06:48,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:48" (1/1) ... [2022-11-16 12:06:48,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:06:48,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:06:48,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:06:48,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:06:48,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:48" (1/1) ... [2022-11-16 12:06:48,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:06:48,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:48,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:06:48,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:06:48,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:06:48,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:06:48,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:06:48,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:06:48,454 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:06:48,456 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:06:48,946 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:06:48,957 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:06:48,959 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 12:06:48,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:06:48 BoogieIcfgContainer [2022-11-16 12:06:48,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:06:48,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:06:48,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:06:48,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:06:48,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:06:47" (1/3) ... [2022-11-16 12:06:48,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@457ef61a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:06:48, skipping insertion in model container [2022-11-16 12:06:48,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:48" (2/3) ... [2022-11-16 12:06:48,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@457ef61a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:06:48, skipping insertion in model container [2022-11-16 12:06:48,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:06:48" (3/3) ... [2022-11-16 12:06:48,979 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c [2022-11-16 12:06:49,001 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:06:49,001 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:06:49,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:06:49,097 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;@253eebb3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:06:49,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:06:49,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.7228915662650603) internal successors, (143), 84 states have internal predecessors, (143), 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) [2022-11-16 12:06:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 12:06:49,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:49,113 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] [2022-11-16 12:06:49,114 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:49,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:49,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1338703135, now seen corresponding path program 1 times [2022-11-16 12:06:49,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:49,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896634973] [2022-11-16 12:06:49,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:49,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:49,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:49,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896634973] [2022-11-16 12:06:49,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896634973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:49,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:49,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:49,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543776355] [2022-11-16 12:06:49,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:49,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:06:49,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:49,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:06:49,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:06:49,468 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.7228915662650603) internal successors, (143), 84 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2022-11-16 12:06:49,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:49,506 INFO L93 Difference]: Finished difference Result 137 states and 229 transitions. [2022-11-16 12:06:49,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:06:49,511 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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 29 [2022-11-16 12:06:49,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:49,522 INFO L225 Difference]: With dead ends: 137 [2022-11-16 12:06:49,523 INFO L226 Difference]: Without dead ends: 81 [2022-11-16 12:06:49,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:06:49,531 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:49,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:06:49,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-16 12:06:49,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-16 12:06:49,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.7) internal successors, (136), 80 states have internal predecessors, (136), 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) [2022-11-16 12:06:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 136 transitions. [2022-11-16 12:06:49,589 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 136 transitions. Word has length 29 [2022-11-16 12:06:49,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:49,590 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 136 transitions. [2022-11-16 12:06:49,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2022-11-16 12:06:49,591 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 136 transitions. [2022-11-16 12:06:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 12:06:49,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:49,592 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] [2022-11-16 12:06:49,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:06:49,593 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1472716641, now seen corresponding path program 1 times [2022-11-16 12:06:49,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:49,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137486334] [2022-11-16 12:06:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:49,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:49,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:49,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137486334] [2022-11-16 12:06:49,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137486334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:49,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:49,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:06:49,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034121723] [2022-11-16 12:06:49,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:49,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:06:49,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:49,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:06:49,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:49,885 INFO L87 Difference]: Start difference. First operand 81 states and 136 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-11-16 12:06:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:49,997 INFO L93 Difference]: Finished difference Result 136 states and 222 transitions. [2022-11-16 12:06:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:49,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 29 [2022-11-16 12:06:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:50,000 INFO L225 Difference]: With dead ends: 136 [2022-11-16 12:06:50,000 INFO L226 Difference]: Without dead ends: 81 [2022-11-16 12:06:50,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:06:50,002 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 3 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:50,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 509 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:50,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-16 12:06:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-16 12:06:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.4) internal successors, (112), 80 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:50,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 112 transitions. [2022-11-16 12:06:50,011 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 112 transitions. Word has length 29 [2022-11-16 12:06:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:50,012 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 112 transitions. [2022-11-16 12:06:50,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-11-16 12:06:50,012 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 112 transitions. [2022-11-16 12:06:50,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 12:06:50,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:50,014 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] [2022-11-16 12:06:50,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:06:50,015 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:50,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:50,015 INFO L85 PathProgramCache]: Analyzing trace with hash -483680104, now seen corresponding path program 1 times [2022-11-16 12:06:50,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:50,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469886963] [2022-11-16 12:06:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:50,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:50,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:50,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469886963] [2022-11-16 12:06:50,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469886963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:50,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:50,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:50,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027418687] [2022-11-16 12:06:50,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:50,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:50,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:50,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:50,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:50,122 INFO L87 Difference]: Start difference. First operand 81 states and 112 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-11-16 12:06:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:50,163 INFO L93 Difference]: Finished difference Result 175 states and 262 transitions. [2022-11-16 12:06:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:50,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-16 12:06:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:50,165 INFO L225 Difference]: With dead ends: 175 [2022-11-16 12:06:50,166 INFO L226 Difference]: Without dead ends: 124 [2022-11-16 12:06:50,166 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 [2022-11-16 12:06:50,168 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 62 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:50,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 228 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:06:50,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-16 12:06:50,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-11-16 12:06:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.4710743801652892) internal successors, (178), 121 states have internal predecessors, (178), 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) [2022-11-16 12:06:50,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 178 transitions. [2022-11-16 12:06:50,181 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 178 transitions. Word has length 52 [2022-11-16 12:06:50,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:50,182 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 178 transitions. [2022-11-16 12:06:50,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-11-16 12:06:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 178 transitions. [2022-11-16 12:06:50,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 12:06:50,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:50,184 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] [2022-11-16 12:06:50,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:06:50,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:50,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:50,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1993840089, now seen corresponding path program 1 times [2022-11-16 12:06:50,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:50,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516997810] [2022-11-16 12:06:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:50,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:50,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:50,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516997810] [2022-11-16 12:06:50,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516997810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:50,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:50,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:06:50,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598774800] [2022-11-16 12:06:50,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:50,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:06:50,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:50,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:06:50,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:50,400 INFO L87 Difference]: Start difference. First operand 122 states and 178 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2022-11-16 12:06:50,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:50,588 INFO L93 Difference]: Finished difference Result 582 states and 918 transitions. [2022-11-16 12:06:50,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:06:50,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-16 12:06:50,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:50,596 INFO L225 Difference]: With dead ends: 582 [2022-11-16 12:06:50,596 INFO L226 Difference]: Without dead ends: 490 [2022-11-16 12:06:50,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:06:50,607 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 721 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:50,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 586 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-11-16 12:06:50,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 212. [2022-11-16 12:06:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.5213270142180095) internal successors, (321), 211 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) [2022-11-16 12:06:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 321 transitions. [2022-11-16 12:06:50,635 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 321 transitions. Word has length 52 [2022-11-16 12:06:50,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:50,636 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 321 transitions. [2022-11-16 12:06:50,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2022-11-16 12:06:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 321 transitions. [2022-11-16 12:06:50,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 12:06:50,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:50,638 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] [2022-11-16 12:06:50,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:06:50,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:50,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:50,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1296177241, now seen corresponding path program 1 times [2022-11-16 12:06:50,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:50,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476022117] [2022-11-16 12:06:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:50,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:51,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:51,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476022117] [2022-11-16 12:06:51,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476022117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:51,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:51,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:06:51,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987302798] [2022-11-16 12:06:51,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:51,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:51,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:51,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:51,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:51,095 INFO L87 Difference]: Start difference. First operand 212 states and 321 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:51,294 INFO L93 Difference]: Finished difference Result 410 states and 628 transitions. [2022-11-16 12:06:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:06:51,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-16 12:06:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:51,298 INFO L225 Difference]: With dead ends: 410 [2022-11-16 12:06:51,298 INFO L226 Difference]: Without dead ends: 408 [2022-11-16 12:06:51,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:06:51,304 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 522 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:51,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 570 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:06:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-16 12:06:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 224. [2022-11-16 12:06:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.493273542600897) internal successors, (333), 223 states have internal predecessors, (333), 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) [2022-11-16 12:06:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 333 transitions. [2022-11-16 12:06:51,356 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 333 transitions. Word has length 53 [2022-11-16 12:06:51,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:51,358 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 333 transitions. [2022-11-16 12:06:51,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:51,361 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 333 transitions. [2022-11-16 12:06:51,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 12:06:51,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:51,370 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] [2022-11-16 12:06:51,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:06:51,371 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:51,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1579367345, now seen corresponding path program 1 times [2022-11-16 12:06:51,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:51,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075132574] [2022-11-16 12:06:51,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:51,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:51,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:51,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075132574] [2022-11-16 12:06:51,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075132574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:51,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:51,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:51,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991933820] [2022-11-16 12:06:51,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:51,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:51,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:51,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:51,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:51,506 INFO L87 Difference]: Start difference. First operand 224 states and 333 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:51,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:51,564 INFO L93 Difference]: Finished difference Result 582 states and 889 transitions. [2022-11-16 12:06:51,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:51,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-11-16 12:06:51,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:51,568 INFO L225 Difference]: With dead ends: 582 [2022-11-16 12:06:51,569 INFO L226 Difference]: Without dead ends: 388 [2022-11-16 12:06:51,570 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 [2022-11-16 12:06:51,573 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 50 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:51,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 186 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:06:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-16 12:06:51,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 382. [2022-11-16 12:06:51,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.5039370078740157) internal successors, (573), 381 states have internal predecessors, (573), 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) [2022-11-16 12:06:51,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 573 transitions. [2022-11-16 12:06:51,629 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 573 transitions. Word has length 54 [2022-11-16 12:06:51,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:51,629 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 573 transitions. [2022-11-16 12:06:51,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:51,629 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 573 transitions. [2022-11-16 12:06:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 12:06:51,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:51,633 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] [2022-11-16 12:06:51,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:06:51,633 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:51,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:51,635 INFO L85 PathProgramCache]: Analyzing trace with hash 681636818, now seen corresponding path program 1 times [2022-11-16 12:06:51,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:51,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652254730] [2022-11-16 12:06:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:51,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:51,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:51,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652254730] [2022-11-16 12:06:51,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652254730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:51,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:51,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:51,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918062591] [2022-11-16 12:06:51,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:51,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:51,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:51,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:51,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:51,727 INFO L87 Difference]: Start difference. First operand 382 states and 573 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2022-11-16 12:06:51,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:51,798 INFO L93 Difference]: Finished difference Result 1022 states and 1547 transitions. [2022-11-16 12:06:51,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:51,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-16 12:06:51,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:51,802 INFO L225 Difference]: With dead ends: 1022 [2022-11-16 12:06:51,802 INFO L226 Difference]: Without dead ends: 670 [2022-11-16 12:06:51,803 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 [2022-11-16 12:06:51,804 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 58 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:51,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 226 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:06:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-11-16 12:06:51,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 668. [2022-11-16 12:06:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 1.4917541229385307) internal successors, (995), 667 states have internal predecessors, (995), 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) [2022-11-16 12:06:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 995 transitions. [2022-11-16 12:06:51,874 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 995 transitions. Word has length 55 [2022-11-16 12:06:51,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:51,874 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 995 transitions. [2022-11-16 12:06:51,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2022-11-16 12:06:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 995 transitions. [2022-11-16 12:06:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 12:06:51,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:51,876 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] [2022-11-16 12:06:51,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:06:51,877 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:51,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:51,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1818745234, now seen corresponding path program 1 times [2022-11-16 12:06:51,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:51,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690498076] [2022-11-16 12:06:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:51,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:51,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:51,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690498076] [2022-11-16 12:06:51,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690498076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:51,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:51,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:51,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438891354] [2022-11-16 12:06:51,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:51,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:51,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:51,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:51,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:51,964 INFO L87 Difference]: Start difference. First operand 668 states and 995 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2022-11-16 12:06:52,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:52,131 INFO L93 Difference]: Finished difference Result 1816 states and 2701 transitions. [2022-11-16 12:06:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:52,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-16 12:06:52,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:52,136 INFO L225 Difference]: With dead ends: 1816 [2022-11-16 12:06:52,136 INFO L226 Difference]: Without dead ends: 1178 [2022-11-16 12:06:52,137 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 [2022-11-16 12:06:52,138 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 66 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:52,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 242 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:06:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-11-16 12:06:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1176. [2022-11-16 12:06:52,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 1.4629787234042553) internal successors, (1719), 1175 states have internal predecessors, (1719), 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) [2022-11-16 12:06:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1719 transitions. [2022-11-16 12:06:52,306 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1719 transitions. Word has length 55 [2022-11-16 12:06:52,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:52,307 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 1719 transitions. [2022-11-16 12:06:52,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2022-11-16 12:06:52,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1719 transitions. [2022-11-16 12:06:52,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 12:06:52,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:52,308 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] [2022-11-16 12:06:52,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:06:52,308 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:52,309 INFO L85 PathProgramCache]: Analyzing trace with hash -258348272, now seen corresponding path program 1 times [2022-11-16 12:06:52,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:52,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991693324] [2022-11-16 12:06:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:52,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:52,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:52,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991693324] [2022-11-16 12:06:52,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991693324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:52,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:52,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:52,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465255374] [2022-11-16 12:06:52,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:52,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:52,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:52,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:52,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:52,360 INFO L87 Difference]: Start difference. First operand 1176 states and 1719 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2022-11-16 12:06:52,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:52,587 INFO L93 Difference]: Finished difference Result 2319 states and 3421 transitions. [2022-11-16 12:06:52,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:52,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2022-11-16 12:06:52,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:52,594 INFO L225 Difference]: With dead ends: 2319 [2022-11-16 12:06:52,594 INFO L226 Difference]: Without dead ends: 1676 [2022-11-16 12:06:52,595 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 [2022-11-16 12:06:52,596 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 67 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:52,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 253 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:06:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2022-11-16 12:06:52,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1674. [2022-11-16 12:06:52,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 1.4542737597130904) internal successors, (2433), 1673 states have internal predecessors, (2433), 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) [2022-11-16 12:06:52,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2433 transitions. [2022-11-16 12:06:52,831 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2433 transitions. Word has length 56 [2022-11-16 12:06:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:52,831 INFO L495 AbstractCegarLoop]: Abstraction has 1674 states and 2433 transitions. [2022-11-16 12:06:52,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2022-11-16 12:06:52,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2433 transitions. [2022-11-16 12:06:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 12:06:52,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:52,833 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:06:52,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:06:52,834 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:52,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:52,839 INFO L85 PathProgramCache]: Analyzing trace with hash -320122492, now seen corresponding path program 1 times [2022-11-16 12:06:52,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:52,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932773239] [2022-11-16 12:06:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:52,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:06:53,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:53,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932773239] [2022-11-16 12:06:53,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932773239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:53,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:53,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:06:53,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651689700] [2022-11-16 12:06:53,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:53,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:06:53,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:53,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:06:53,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:53,038 INFO L87 Difference]: Start difference. First operand 1674 states and 2433 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2022-11-16 12:06:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:53,620 INFO L93 Difference]: Finished difference Result 4724 states and 6970 transitions. [2022-11-16 12:06:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:06:53,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 78 [2022-11-16 12:06:53,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:53,633 INFO L225 Difference]: With dead ends: 4724 [2022-11-16 12:06:53,634 INFO L226 Difference]: Without dead ends: 3890 [2022-11-16 12:06:53,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:06:53,636 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 518 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:53,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 608 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:53,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2022-11-16 12:06:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 2482. [2022-11-16 12:06:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2481 states have (on average 1.456267634018541) internal successors, (3613), 2481 states have internal predecessors, (3613), 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) [2022-11-16 12:06:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3613 transitions. [2022-11-16 12:06:54,020 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3613 transitions. Word has length 78 [2022-11-16 12:06:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:54,020 INFO L495 AbstractCegarLoop]: Abstraction has 2482 states and 3613 transitions. [2022-11-16 12:06:54,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2022-11-16 12:06:54,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3613 transitions. [2022-11-16 12:06:54,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 12:06:54,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:54,029 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:06:54,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:06:54,029 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:54,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1605488763, now seen corresponding path program 1 times [2022-11-16 12:06:54,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:54,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057270875] [2022-11-16 12:06:54,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:54,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:06:54,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:54,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057270875] [2022-11-16 12:06:54,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057270875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:54,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:54,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:06:54,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062324957] [2022-11-16 12:06:54,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:54,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:06:54,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:54,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:06:54,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:54,236 INFO L87 Difference]: Start difference. First operand 2482 states and 3613 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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) [2022-11-16 12:06:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:54,857 INFO L93 Difference]: Finished difference Result 5532 states and 8150 transitions. [2022-11-16 12:06:54,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:06:54,858 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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 78 [2022-11-16 12:06:54,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:54,873 INFO L225 Difference]: With dead ends: 5532 [2022-11-16 12:06:54,873 INFO L226 Difference]: Without dead ends: 4698 [2022-11-16 12:06:54,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:06:54,878 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 509 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:54,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 617 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2022-11-16 12:06:55,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 3290. [2022-11-16 12:06:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 1.4572818485861965) internal successors, (4793), 3289 states have internal predecessors, (4793), 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) [2022-11-16 12:06:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 4793 transitions. [2022-11-16 12:06:55,302 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 4793 transitions. Word has length 78 [2022-11-16 12:06:55,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:55,303 INFO L495 AbstractCegarLoop]: Abstraction has 3290 states and 4793 transitions. [2022-11-16 12:06:55,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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) [2022-11-16 12:06:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 4793 transitions. [2022-11-16 12:06:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-16 12:06:55,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:55,305 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:06:55,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:06:55,306 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:55,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:55,306 INFO L85 PathProgramCache]: Analyzing trace with hash 140154659, now seen corresponding path program 1 times [2022-11-16 12:06:55,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:55,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839080829] [2022-11-16 12:06:55,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:55,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:06:55,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:55,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839080829] [2022-11-16 12:06:55,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839080829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:55,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:55,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:06:55,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521138115] [2022-11-16 12:06:55,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:55,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:06:55,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:06:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:55,463 INFO L87 Difference]: Start difference. First operand 3290 states and 4793 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2022-11-16 12:06:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:56,253 INFO L93 Difference]: Finished difference Result 6340 states and 9330 transitions. [2022-11-16 12:06:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:06:56,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 78 [2022-11-16 12:06:56,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:56,271 INFO L225 Difference]: With dead ends: 6340 [2022-11-16 12:06:56,271 INFO L226 Difference]: Without dead ends: 5506 [2022-11-16 12:06:56,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:06:56,275 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 474 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:56,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 681 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:56,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5506 states. [2022-11-16 12:06:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5506 to 4098. [2022-11-16 12:06:56,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 1.457896021479131) internal successors, (5973), 4097 states have internal predecessors, (5973), 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) [2022-11-16 12:06:56,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 5973 transitions. [2022-11-16 12:06:56,788 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 5973 transitions. Word has length 78 [2022-11-16 12:06:56,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:56,788 INFO L495 AbstractCegarLoop]: Abstraction has 4098 states and 5973 transitions. [2022-11-16 12:06:56,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2022-11-16 12:06:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 5973 transitions. [2022-11-16 12:06:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 12:06:56,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:56,791 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:06:56,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:06:56,792 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:56,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:56,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1548609917, now seen corresponding path program 1 times [2022-11-16 12:06:56,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:56,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192089972] [2022-11-16 12:06:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:56,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:56,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:56,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192089972] [2022-11-16 12:06:56,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192089972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:56,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:56,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:56,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146711426] [2022-11-16 12:06:56,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:56,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:56,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:56,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:56,934 INFO L87 Difference]: Start difference. First operand 4098 states and 5973 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:57,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:57,454 INFO L93 Difference]: Finished difference Result 8166 states and 11915 transitions. [2022-11-16 12:06:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:57,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-16 12:06:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:57,467 INFO L225 Difference]: With dead ends: 8166 [2022-11-16 12:06:57,468 INFO L226 Difference]: Without dead ends: 4100 [2022-11-16 12:06:57,471 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 [2022-11-16 12:06:57,472 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 53 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:57,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 240 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:06:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2022-11-16 12:06:57,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 4098. [2022-11-16 12:06:57,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4097 states have (on average 1.4432511593849158) internal successors, (5913), 4097 states have internal predecessors, (5913), 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) [2022-11-16 12:06:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 5913 transitions. [2022-11-16 12:06:57,955 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 5913 transitions. Word has length 79 [2022-11-16 12:06:57,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:57,955 INFO L495 AbstractCegarLoop]: Abstraction has 4098 states and 5913 transitions. [2022-11-16 12:06:57,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 5913 transitions. [2022-11-16 12:06:57,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 12:06:57,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:57,958 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:06:57,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:06:57,958 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:57,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:57,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1346852612, now seen corresponding path program 1 times [2022-11-16 12:06:57,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:57,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825515511] [2022-11-16 12:06:57,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:57,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:58,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:58,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825515511] [2022-11-16 12:06:58,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825515511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:58,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:58,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:58,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344993189] [2022-11-16 12:06:58,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:58,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:58,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:58,096 INFO L87 Difference]: Start difference. First operand 4098 states and 5913 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:58,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:58,431 INFO L93 Difference]: Finished difference Result 6134 states and 8855 transitions. [2022-11-16 12:06:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:58,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-16 12:06:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:58,443 INFO L225 Difference]: With dead ends: 6134 [2022-11-16 12:06:58,443 INFO L226 Difference]: Without dead ends: 2068 [2022-11-16 12:06:58,448 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 [2022-11-16 12:06:58,449 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 47 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:58,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 218 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:06:58,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2022-11-16 12:06:58,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 2066. [2022-11-16 12:06:58,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 1.425181598062954) internal successors, (2943), 2065 states have internal predecessors, (2943), 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) [2022-11-16 12:06:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 2943 transitions. [2022-11-16 12:06:58,724 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 2943 transitions. Word has length 79 [2022-11-16 12:06:58,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:58,724 INFO L495 AbstractCegarLoop]: Abstraction has 2066 states and 2943 transitions. [2022-11-16 12:06:58,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 2943 transitions. [2022-11-16 12:06:58,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 12:06:58,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:58,726 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:06:58,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:06:58,727 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:06:58,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:58,727 INFO L85 PathProgramCache]: Analyzing trace with hash -960604293, now seen corresponding path program 1 times [2022-11-16 12:06:58,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:58,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418740343] [2022-11-16 12:06:58,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:58,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:59,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:59,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418740343] [2022-11-16 12:06:59,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418740343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:59,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577002182] [2022-11-16 12:06:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:59,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:59,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:59,430 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:59,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:06:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:59,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:06:59,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:07:00,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:07:00,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577002182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:00,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:07:00,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 16 [2022-11-16 12:07:00,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403923602] [2022-11-16 12:07:00,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:00,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:07:00,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:00,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:07:00,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:07:00,307 INFO L87 Difference]: Start difference. First operand 2066 states and 2943 transitions. Second operand has 16 states, 16 states have (on average 13.9375) internal successors, (223), 16 states have internal predecessors, (223), 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) [2022-11-16 12:07:08,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:08,555 INFO L93 Difference]: Finished difference Result 21164 states and 29897 transitions. [2022-11-16 12:07:08,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-16 12:07:08,556 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.9375) internal successors, (223), 16 states have internal predecessors, (223), 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 79 [2022-11-16 12:07:08,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:08,611 INFO L225 Difference]: With dead ends: 21164 [2022-11-16 12:07:08,611 INFO L226 Difference]: Without dead ends: 19742 [2022-11-16 12:07:08,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1266, Invalid=4896, Unknown=0, NotChecked=0, Total=6162 [2022-11-16 12:07:08,619 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 5637 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5637 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:08,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5637 Valid, 1824 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 12:07:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19742 states. [2022-11-16 12:07:10,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19742 to 12442. [2022-11-16 12:07:10,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12442 states, 12441 states have (on average 1.3985210192106743) internal successors, (17399), 12441 states have internal predecessors, (17399), 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) [2022-11-16 12:07:10,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12442 states to 12442 states and 17399 transitions. [2022-11-16 12:07:10,469 INFO L78 Accepts]: Start accepts. Automaton has 12442 states and 17399 transitions. Word has length 79 [2022-11-16 12:07:10,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:10,470 INFO L495 AbstractCegarLoop]: Abstraction has 12442 states and 17399 transitions. [2022-11-16 12:07:10,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.9375) internal successors, (223), 16 states have internal predecessors, (223), 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) [2022-11-16 12:07:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 12442 states and 17399 transitions. [2022-11-16 12:07:10,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 12:07:10,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:10,472 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:07:10,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:07:10,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:07:10,677 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:10,678 INFO L85 PathProgramCache]: Analyzing trace with hash -226962490, now seen corresponding path program 1 times [2022-11-16 12:07:10,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:10,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737574002] [2022-11-16 12:07:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:10,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:07:10,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:10,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737574002] [2022-11-16 12:07:10,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737574002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:10,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:10,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:07:10,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394183471] [2022-11-16 12:07:10,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:10,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:07:10,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:10,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:07:10,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:07:10,808 INFO L87 Difference]: Start difference. First operand 12442 states and 17399 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:12,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:12,905 INFO L93 Difference]: Finished difference Result 21666 states and 30490 transitions. [2022-11-16 12:07:12,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:07:12,905 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-16 12:07:12,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:12,943 INFO L225 Difference]: With dead ends: 21666 [2022-11-16 12:07:12,943 INFO L226 Difference]: Without dead ends: 19554 [2022-11-16 12:07:12,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:07:12,949 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 461 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:12,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 762 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:07:12,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19554 states. [2022-11-16 12:07:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19554 to 14590. [2022-11-16 12:07:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14590 states, 14589 states have (on average 1.3974227157447392) internal successors, (20387), 14589 states have internal predecessors, (20387), 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) [2022-11-16 12:07:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14590 states to 14590 states and 20387 transitions. [2022-11-16 12:07:14,941 INFO L78 Accepts]: Start accepts. Automaton has 14590 states and 20387 transitions. Word has length 80 [2022-11-16 12:07:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:14,941 INFO L495 AbstractCegarLoop]: Abstraction has 14590 states and 20387 transitions. [2022-11-16 12:07:14,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:14,942 INFO L276 IsEmpty]: Start isEmpty. Operand 14590 states and 20387 transitions. [2022-11-16 12:07:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-16 12:07:14,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:14,944 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:07:14,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 12:07:14,944 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:14,945 INFO L85 PathProgramCache]: Analyzing trace with hash 113138310, now seen corresponding path program 1 times [2022-11-16 12:07:14,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:14,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268674684] [2022-11-16 12:07:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:14,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:15,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:15,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268674684] [2022-11-16 12:07:15,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268674684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:15,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:15,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:07:15,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694907389] [2022-11-16 12:07:15,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:15,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:07:15,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:15,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:07:15,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:07:15,045 INFO L87 Difference]: Start difference. First operand 14590 states and 20387 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2022-11-16 12:07:15,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:15,833 INFO L93 Difference]: Finished difference Result 20928 states and 29094 transitions. [2022-11-16 12:07:15,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:07:15,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 81 [2022-11-16 12:07:15,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:15,845 INFO L225 Difference]: With dead ends: 20928 [2022-11-16 12:07:15,846 INFO L226 Difference]: Without dead ends: 6370 [2022-11-16 12:07:15,858 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 [2022-11-16 12:07:15,858 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 37 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:15,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 210 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:07:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6370 states. [2022-11-16 12:07:16,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6370 to 6368. [2022-11-16 12:07:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6368 states, 6367 states have (on average 1.3497722632322915) internal successors, (8594), 6367 states have internal predecessors, (8594), 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) [2022-11-16 12:07:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6368 states to 6368 states and 8594 transitions. [2022-11-16 12:07:16,637 INFO L78 Accepts]: Start accepts. Automaton has 6368 states and 8594 transitions. Word has length 81 [2022-11-16 12:07:16,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:16,637 INFO L495 AbstractCegarLoop]: Abstraction has 6368 states and 8594 transitions. [2022-11-16 12:07:16,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2022-11-16 12:07:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 6368 states and 8594 transitions. [2022-11-16 12:07:16,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-16 12:07:16,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:16,639 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:07:16,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 12:07:16,639 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:16,640 INFO L85 PathProgramCache]: Analyzing trace with hash -750605600, now seen corresponding path program 1 times [2022-11-16 12:07:16,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:16,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326042022] [2022-11-16 12:07:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:16,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:17,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:17,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326042022] [2022-11-16 12:07:17,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326042022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:17,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363414587] [2022-11-16 12:07:17,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:17,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:17,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:17,232 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:17,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:07:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:17,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:07:17,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:18,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:19,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363414587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:19,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:07:19,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 28 [2022-11-16 12:07:19,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304176711] [2022-11-16 12:07:19,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:19,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:07:19,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:19,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:07:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:07:19,968 INFO L87 Difference]: Start difference. First operand 6368 states and 8594 transitions. Second operand has 28 states, 28 states have (on average 7.928571428571429) internal successors, (222), 28 states have internal predecessors, (222), 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) [2022-11-16 12:07:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:32,760 INFO L93 Difference]: Finished difference Result 59027 states and 79069 transitions. [2022-11-16 12:07:32,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-16 12:07:32,760 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 7.928571428571429) internal successors, (222), 28 states have internal predecessors, (222), 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 83 [2022-11-16 12:07:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:32,854 INFO L225 Difference]: With dead ends: 59027 [2022-11-16 12:07:32,854 INFO L226 Difference]: Without dead ends: 52697 [2022-11-16 12:07:32,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1341, Invalid=4979, Unknown=0, NotChecked=0, Total=6320 [2022-11-16 12:07:32,871 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 2589 mSDsluCounter, 3203 mSDsCounter, 0 mSdLazyCounter, 2360 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2589 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 2416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:32,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2589 Valid, 3380 Invalid, 2416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2360 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 12:07:32,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52697 states. [2022-11-16 12:07:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52697 to 26461. [2022-11-16 12:07:36,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26461 states, 26460 states have (on average 1.3438019652305366) internal successors, (35557), 26460 states have internal predecessors, (35557), 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) [2022-11-16 12:07:36,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26461 states to 26461 states and 35557 transitions. [2022-11-16 12:07:36,711 INFO L78 Accepts]: Start accepts. Automaton has 26461 states and 35557 transitions. Word has length 83 [2022-11-16 12:07:36,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:36,711 INFO L495 AbstractCegarLoop]: Abstraction has 26461 states and 35557 transitions. [2022-11-16 12:07:36,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.928571428571429) internal successors, (222), 28 states have internal predecessors, (222), 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) [2022-11-16 12:07:36,712 INFO L276 IsEmpty]: Start isEmpty. Operand 26461 states and 35557 transitions. [2022-11-16 12:07:36,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-16 12:07:36,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:36,714 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:07:36,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:36,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:07:36,921 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:36,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:36,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1726914593, now seen corresponding path program 1 times [2022-11-16 12:07:36,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:36,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826364817] [2022-11-16 12:07:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:36,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:37,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:37,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826364817] [2022-11-16 12:07:37,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826364817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:37,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:37,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:07:37,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189718403] [2022-11-16 12:07:37,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:37,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:07:37,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:37,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:07:37,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:07:37,101 INFO L87 Difference]: Start difference. First operand 26461 states and 35557 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:39,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:39,157 INFO L93 Difference]: Finished difference Result 40285 states and 54092 transitions. [2022-11-16 12:07:39,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:07:39,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-11-16 12:07:39,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:39,178 INFO L225 Difference]: With dead ends: 40285 [2022-11-16 12:07:39,179 INFO L226 Difference]: Without dead ends: 14986 [2022-11-16 12:07:39,206 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 [2022-11-16 12:07:39,206 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 27 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:39,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 188 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:07:39,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14986 states. [2022-11-16 12:07:41,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14986 to 14984. [2022-11-16 12:07:41,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14984 states, 14983 states have (on average 1.3217646666221718) internal successors, (19804), 14983 states have internal predecessors, (19804), 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) [2022-11-16 12:07:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14984 states to 14984 states and 19804 transitions. [2022-11-16 12:07:41,418 INFO L78 Accepts]: Start accepts. Automaton has 14984 states and 19804 transitions. Word has length 83 [2022-11-16 12:07:41,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:41,419 INFO L495 AbstractCegarLoop]: Abstraction has 14984 states and 19804 transitions. [2022-11-16 12:07:41,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:41,419 INFO L276 IsEmpty]: Start isEmpty. Operand 14984 states and 19804 transitions. [2022-11-16 12:07:41,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-16 12:07:41,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:41,420 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:07:41,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 12:07:41,421 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:07:41,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:41,421 INFO L85 PathProgramCache]: Analyzing trace with hash -775907934, now seen corresponding path program 1 times [2022-11-16 12:07:41,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:41,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534807326] [2022-11-16 12:07:41,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:41,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:42,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:42,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534807326] [2022-11-16 12:07:42,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534807326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:42,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343511530] [2022-11-16 12:07:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:42,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:42,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:42,429 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:42,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e434a92b-2331-4e1f-bcb0-0cf770dbaf69/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:07:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:42,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:07:42,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:43,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:44,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343511530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:44,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:07:44,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2022-11-16 12:07:44,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352713885] [2022-11-16 12:07:44,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:44,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 12:07:44,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:44,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 12:07:44,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:07:44,693 INFO L87 Difference]: Start difference. First operand 14984 states and 19804 transitions. Second operand has 33 states, 33 states have (on average 6.787878787878788) internal successors, (224), 33 states have internal predecessors, (224), 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) [2022-11-16 12:08:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:26,119 INFO L93 Difference]: Finished difference Result 208031 states and 267623 transitions. [2022-11-16 12:08:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-16 12:08:26,120 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.787878787878788) internal successors, (224), 33 states have internal predecessors, (224), 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 83 [2022-11-16 12:08:26,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:26,468 INFO L225 Difference]: With dead ends: 208031 [2022-11-16 12:08:26,469 INFO L226 Difference]: Without dead ends: 193948 [2022-11-16 12:08:26,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6109 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3055, Invalid=15305, Unknown=0, NotChecked=0, Total=18360 [2022-11-16 12:08:26,525 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 3408 mSDsluCounter, 4106 mSDsCounter, 0 mSdLazyCounter, 4019 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3408 SdHoareTripleChecker+Valid, 4468 SdHoareTripleChecker+Invalid, 4083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 4019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:26,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3408 Valid, 4468 Invalid, 4083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 4019 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-16 12:08:26,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193948 states.