./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc --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 a5deaf1c7eecf4d76182f6b98ab14efecb2cf3c3c2e7d8162af75087f90c331b --- 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-5e519f3 [2022-11-02 20:28:48,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:28:48,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:28:48,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:28:48,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:28:48,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:28:48,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:28:48,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:28:48,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:28:48,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:28:48,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:28:48,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:28:48,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:28:48,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:28:48,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:28:48,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:28:48,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:28:48,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:28:48,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:28:48,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:28:48,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:28:48,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:28:48,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:28:48,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:28:48,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:28:48,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:28:48,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:28:48,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:28:48,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:28:48,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:28:48,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:28:48,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:28:48,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:28:48,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:28:48,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:28:48,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:28:48,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:28:48,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:28:48,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:28:48,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:28:48,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:28:48,232 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:28:48,285 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:28:48,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:28:48,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:28:48,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:28:48,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:28:48,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:28:48,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:28:48,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:28:48,290 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:28:48,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:28:48,292 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:28:48,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:28:48,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:28:48,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:28:48,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:28:48,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:28:48,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:28:48,294 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:28:48,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:28:48,294 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:28:48,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:28:48,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:28:48,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:28:48,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:28:48,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:28:48,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:28:48,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:28:48,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:28:48,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:28:48,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:28:48,298 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:28:48,298 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:28:48,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:28:48,299 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_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5deaf1c7eecf4d76182f6b98ab14efecb2cf3c3c2e7d8162af75087f90c331b [2022-11-02 20:28:48,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:28:48,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:28:48,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:28:48,723 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:28:48,724 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:28:48,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c [2022-11-02 20:28:48,857 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/data/5f567e35a/ba68a3a29b39469d931472f09e820168/FLAGd3183a349 [2022-11-02 20:28:49,477 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:28:49,478 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c [2022-11-02 20:28:49,492 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/data/5f567e35a/ba68a3a29b39469d931472f09e820168/FLAGd3183a349 [2022-11-02 20:28:49,750 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/data/5f567e35a/ba68a3a29b39469d931472f09e820168 [2022-11-02 20:28:49,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:28:49,754 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:28:49,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:28:49,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:28:49,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:28:49,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:28:49" (1/1) ... [2022-11-02 20:28:49,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@633d6ee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:49, skipping insertion in model container [2022-11-02 20:28:49,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:28:49" (1/1) ... [2022-11-02 20:28:49,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:28:49,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:28:50,103 WARN L230 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_551030ac-eeb2-470f-b8a3-2ed207004206/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c[6844,6857] [2022-11-02 20:28:50,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:28:50,119 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:28:50,169 WARN L230 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_551030ac-eeb2-470f-b8a3-2ed207004206/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c[6844,6857] [2022-11-02 20:28:50,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:28:50,188 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:28:50,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:50 WrapperNode [2022-11-02 20:28:50,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:28:50,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:28:50,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:28:50,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:28:50,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:50" (1/1) ... [2022-11-02 20:28:50,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:50" (1/1) ... [2022-11-02 20:28:50,281 INFO L138 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 253 [2022-11-02 20:28:50,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:28:50,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:28:50,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:28:50,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:28:50,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:50" (1/1) ... [2022-11-02 20:28:50,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:50" (1/1) ... [2022-11-02 20:28:50,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:50" (1/1) ... [2022-11-02 20:28:50,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:50" (1/1) ... [2022-11-02 20:28:50,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:50" (1/1) ... [2022-11-02 20:28:50,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:50" (1/1) ... [2022-11-02 20:28:50,350 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:50" (1/1) ... [2022-11-02 20:28:50,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:50" (1/1) ... [2022-11-02 20:28:50,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:28:50,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:28:50,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:28:50,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:28:50,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:50" (1/1) ... [2022-11-02 20:28:50,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:28:50,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:50,420 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:28:50,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:28:50,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:28:50,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:28:50,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:28:50,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:28:50,621 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:28:50,624 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:28:51,188 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:28:51,196 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:28:51,197 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:28:51,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:28:51 BoogieIcfgContainer [2022-11-02 20:28:51,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:28:51,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:28:51,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:28:51,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:28:51,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:28:49" (1/3) ... [2022-11-02 20:28:51,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7b2013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:28:51, skipping insertion in model container [2022-11-02 20:28:51,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:28:50" (2/3) ... [2022-11-02 20:28:51,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7b2013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:28:51, skipping insertion in model container [2022-11-02 20:28:51,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:28:51" (3/3) ... [2022-11-02 20:28:51,217 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c [2022-11-02 20:28:51,247 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:28:51,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:28:51,353 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:28:51,370 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;@614e700a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:28:51,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:28:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 78 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:28:51,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:51,398 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] [2022-11-02 20:28:51,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:51,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:51,409 INFO L85 PathProgramCache]: Analyzing trace with hash 233700331, now seen corresponding path program 1 times [2022-11-02 20:28:51,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:51,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583000286] [2022-11-02 20:28:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:51,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:51,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:51,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583000286] [2022-11-02 20:28:51,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583000286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:51,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:51,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:28:51,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461339854] [2022-11-02 20:28:51,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:51,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:28:51,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:52,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:28:52,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:28:52,021 INFO L87 Difference]: Start difference. First operand has 79 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 78 states have internal predecessors, (129), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:52,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:52,183 INFO L93 Difference]: Finished difference Result 191 states and 307 transitions. [2022-11-02 20:28:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:28:52,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2022-11-02 20:28:52,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:52,200 INFO L225 Difference]: With dead ends: 191 [2022-11-02 20:28:52,200 INFO L226 Difference]: Without dead ends: 127 [2022-11-02 20:28:52,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:28:52,209 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 84 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:52,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 465 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:28:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-02 20:28:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 75. [2022-11-02 20:28:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.4189189189189189) internal successors, (105), 74 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 105 transitions. [2022-11-02 20:28:52,262 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 105 transitions. Word has length 25 [2022-11-02 20:28:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:52,263 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 105 transitions. [2022-11-02 20:28:52,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 105 transitions. [2022-11-02 20:28:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:28:52,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:52,266 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] [2022-11-02 20:28:52,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:28:52,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:52,268 INFO L85 PathProgramCache]: Analyzing trace with hash 182027041, now seen corresponding path program 1 times [2022-11-02 20:28:52,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:52,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222848505] [2022-11-02 20:28:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:52,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:52,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:52,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222848505] [2022-11-02 20:28:52,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222848505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:52,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:52,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:28:52,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116471754] [2022-11-02 20:28:52,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:52,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:28:52,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:52,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:28:52,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:28:52,422 INFO L87 Difference]: Start difference. First operand 75 states and 105 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:52,463 INFO L93 Difference]: Finished difference Result 167 states and 249 transitions. [2022-11-02 20:28:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:28:52,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2022-11-02 20:28:52,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:52,466 INFO L225 Difference]: With dead ends: 167 [2022-11-02 20:28:52,467 INFO L226 Difference]: Without dead ends: 115 [2022-11-02 20:28:52,468 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 [2022-11-02 20:28:52,469 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 70 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 236 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 [2022-11-02 20:28:52,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 236 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:28:52,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-02 20:28:52,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2022-11-02 20:28:52,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2022-11-02 20:28:52,489 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 165 transitions. Word has length 41 [2022-11-02 20:28:52,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:52,490 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 165 transitions. [2022-11-02 20:28:52,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:52,490 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 165 transitions. [2022-11-02 20:28:52,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 20:28:52,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:52,492 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] [2022-11-02 20:28:52,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:28:52,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:52,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:52,494 INFO L85 PathProgramCache]: Analyzing trace with hash 54990345, now seen corresponding path program 1 times [2022-11-02 20:28:52,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:52,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052589580] [2022-11-02 20:28:52,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:52,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:52,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:52,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052589580] [2022-11-02 20:28:52,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052589580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:52,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:52,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:28:52,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347698834] [2022-11-02 20:28:52,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:52,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:28:52,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:52,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:28:52,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:28:52,610 INFO L87 Difference]: Start difference. First operand 113 states and 165 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:52,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:52,656 INFO L93 Difference]: Finished difference Result 269 states and 409 transitions. [2022-11-02 20:28:52,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:28:52,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2022-11-02 20:28:52,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:52,660 INFO L225 Difference]: With dead ends: 269 [2022-11-02 20:28:52,660 INFO L226 Difference]: Without dead ends: 179 [2022-11-02 20:28:52,661 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 [2022-11-02 20:28:52,663 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 65 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 227 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 [2022-11-02 20:28:52,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 227 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:28:52,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-02 20:28:52,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2022-11-02 20:28:52,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.5) internal successors, (264), 176 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 264 transitions. [2022-11-02 20:28:52,736 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 264 transitions. Word has length 42 [2022-11-02 20:28:52,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:52,737 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 264 transitions. [2022-11-02 20:28:52,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:52,737 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 264 transitions. [2022-11-02 20:28:52,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-02 20:28:52,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:52,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:52,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:28:52,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:52,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1508061361, now seen corresponding path program 1 times [2022-11-02 20:28:52,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:52,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894828442] [2022-11-02 20:28:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:52,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:52,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:52,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894828442] [2022-11-02 20:28:52,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894828442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:52,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:52,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:28:52,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459019231] [2022-11-02 20:28:52,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:52,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:28:52,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:52,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:28:52,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:28:52,942 INFO L87 Difference]: Start difference. First operand 177 states and 264 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:53,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:53,040 INFO L93 Difference]: Finished difference Result 437 states and 666 transitions. [2022-11-02 20:28:53,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:28:53,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-02 20:28:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:53,054 INFO L225 Difference]: With dead ends: 437 [2022-11-02 20:28:53,062 INFO L226 Difference]: Without dead ends: 283 [2022-11-02 20:28:53,064 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 [2022-11-02 20:28:53,065 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 60 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 218 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 [2022-11-02 20:28:53,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 218 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:28:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-02 20:28:53,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2022-11-02 20:28:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.5) internal successors, (420), 280 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 420 transitions. [2022-11-02 20:28:53,180 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 420 transitions. Word has length 43 [2022-11-02 20:28:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:53,181 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 420 transitions. [2022-11-02 20:28:53,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:53,181 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 420 transitions. [2022-11-02 20:28:53,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 20:28:53,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:53,183 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] [2022-11-02 20:28:53,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:28:53,184 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:53,184 INFO L85 PathProgramCache]: Analyzing trace with hash -922713191, now seen corresponding path program 1 times [2022-11-02 20:28:53,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:53,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711818985] [2022-11-02 20:28:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:53,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:53,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:53,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711818985] [2022-11-02 20:28:53,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711818985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:53,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:53,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:28:53,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520010565] [2022-11-02 20:28:53,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:53,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:28:53,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:53,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:28:53,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:28:53,433 INFO L87 Difference]: Start difference. First operand 281 states and 420 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:53,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:53,692 INFO L93 Difference]: Finished difference Result 1313 states and 2008 transitions. [2022-11-02 20:28:53,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:28:53,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-02 20:28:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:53,703 INFO L225 Difference]: With dead ends: 1313 [2022-11-02 20:28:53,704 INFO L226 Difference]: Without dead ends: 1055 [2022-11-02 20:28:53,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:28:53,720 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 412 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:53,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 551 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:28:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-11-02 20:28:53,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 537. [2022-11-02 20:28:53,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.492537313432836) internal successors, (800), 536 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 800 transitions. [2022-11-02 20:28:53,837 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 800 transitions. Word has length 44 [2022-11-02 20:28:53,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:53,840 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 800 transitions. [2022-11-02 20:28:53,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:53,846 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 800 transitions. [2022-11-02 20:28:53,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:28:53,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:53,852 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] [2022-11-02 20:28:53,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:28:53,853 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:53,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:53,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1077338731, now seen corresponding path program 1 times [2022-11-02 20:28:53,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:53,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745165041] [2022-11-02 20:28:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:53,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:54,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:54,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745165041] [2022-11-02 20:28:54,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745165041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:54,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:54,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:28:54,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514196470] [2022-11-02 20:28:54,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:54,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:28:54,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:54,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:28:54,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:28:54,039 INFO L87 Difference]: Start difference. First operand 537 states and 800 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:54,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:54,303 INFO L93 Difference]: Finished difference Result 1911 states and 2843 transitions. [2022-11-02 20:28:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:28:54,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2022-11-02 20:28:54,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:54,312 INFO L225 Difference]: With dead ends: 1911 [2022-11-02 20:28:54,312 INFO L226 Difference]: Without dead ends: 1397 [2022-11-02 20:28:54,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:28:54,321 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 209 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:54,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 294 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:28:54,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2022-11-02 20:28:54,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1393. [2022-11-02 20:28:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 1.471264367816092) internal successors, (2048), 1392 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:54,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2048 transitions. [2022-11-02 20:28:54,605 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2048 transitions. Word has length 45 [2022-11-02 20:28:54,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:54,608 INFO L495 AbstractCegarLoop]: Abstraction has 1393 states and 2048 transitions. [2022-11-02 20:28:54,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2048 transitions. [2022-11-02 20:28:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:28:54,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:54,612 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] [2022-11-02 20:28:54,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:28:54,612 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:54,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:54,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1270898830, now seen corresponding path program 1 times [2022-11-02 20:28:54,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:54,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039231007] [2022-11-02 20:28:54,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:54,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:54,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:54,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039231007] [2022-11-02 20:28:54,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039231007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:54,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:54,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:28:54,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997084962] [2022-11-02 20:28:54,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:54,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:28:54,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:54,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:28:54,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:28:54,997 INFO L87 Difference]: Start difference. First operand 1393 states and 2048 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:55,514 INFO L93 Difference]: Finished difference Result 2955 states and 4265 transitions. [2022-11-02 20:28:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:28:55,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2022-11-02 20:28:55,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:55,527 INFO L225 Difference]: With dead ends: 2955 [2022-11-02 20:28:55,527 INFO L226 Difference]: Without dead ends: 2953 [2022-11-02 20:28:55,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:28:55,530 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 225 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:55,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 455 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:28:55,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2022-11-02 20:28:55,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 1537. [2022-11-02 20:28:55,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 1.4270833333333333) internal successors, (2192), 1536 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:55,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 2192 transitions. [2022-11-02 20:28:55,871 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 2192 transitions. Word has length 46 [2022-11-02 20:28:55,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:55,871 INFO L495 AbstractCegarLoop]: Abstraction has 1537 states and 2192 transitions. [2022-11-02 20:28:55,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:55,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 2192 transitions. [2022-11-02 20:28:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 20:28:55,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:55,875 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] [2022-11-02 20:28:55,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:28:55,876 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:55,877 INFO L85 PathProgramCache]: Analyzing trace with hash 795736558, now seen corresponding path program 1 times [2022-11-02 20:28:55,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:55,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753602643] [2022-11-02 20:28:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:55,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:55,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:55,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753602643] [2022-11-02 20:28:55,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753602643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:55,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:55,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:28:55,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246133496] [2022-11-02 20:28:55,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:55,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:28:55,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:55,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:28:55,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:28:55,962 INFO L87 Difference]: Start difference. First operand 1537 states and 2192 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:56,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:56,360 INFO L93 Difference]: Finished difference Result 3651 states and 5220 transitions. [2022-11-02 20:28:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:28:56,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-02 20:28:56,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:56,376 INFO L225 Difference]: With dead ends: 3651 [2022-11-02 20:28:56,376 INFO L226 Difference]: Without dead ends: 2137 [2022-11-02 20:28:56,378 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 [2022-11-02 20:28:56,379 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 51 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:56,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 205 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:28:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2022-11-02 20:28:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2135. [2022-11-02 20:28:56,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 1.4198687910028116) internal successors, (3030), 2134 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3030 transitions. [2022-11-02 20:28:56,769 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3030 transitions. Word has length 47 [2022-11-02 20:28:56,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:56,770 INFO L495 AbstractCegarLoop]: Abstraction has 2135 states and 3030 transitions. [2022-11-02 20:28:56,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:56,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3030 transitions. [2022-11-02 20:28:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 20:28:56,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:56,774 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] [2022-11-02 20:28:56,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:28:56,774 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:56,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1282796535, now seen corresponding path program 1 times [2022-11-02 20:28:56,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:56,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181645801] [2022-11-02 20:28:56,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:56,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:28:57,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:57,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181645801] [2022-11-02 20:28:57,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181645801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:57,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524235172] [2022-11-02 20:28:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:57,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:57,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:57,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:57,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:28:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:57,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:28:57,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:28:57,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:28:57,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524235172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:57,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:57,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2022-11-02 20:28:57,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321489618] [2022-11-02 20:28:57,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:57,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:28:57,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:57,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:28:57,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:28:57,832 INFO L87 Difference]: Start difference. First operand 2135 states and 3030 transitions. Second operand has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:58,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:58,735 INFO L93 Difference]: Finished difference Result 6595 states and 9454 transitions. [2022-11-02 20:28:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:28:58,736 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 0 states have call successors, (0), 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 66 [2022-11-02 20:28:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:58,758 INFO L225 Difference]: With dead ends: 6595 [2022-11-02 20:28:58,758 INFO L226 Difference]: Without dead ends: 5081 [2022-11-02 20:28:58,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:28:58,762 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 413 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:58,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 909 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:28:58,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2022-11-02 20:28:59,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 4831. [2022-11-02 20:28:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4831 states, 4830 states have (on average 1.4140786749482401) internal successors, (6830), 4830 states have internal predecessors, (6830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:59,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4831 states to 4831 states and 6830 transitions. [2022-11-02 20:28:59,472 INFO L78 Accepts]: Start accepts. Automaton has 4831 states and 6830 transitions. Word has length 66 [2022-11-02 20:28:59,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:59,473 INFO L495 AbstractCegarLoop]: Abstraction has 4831 states and 6830 transitions. [2022-11-02 20:28:59,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4831 states and 6830 transitions. [2022-11-02 20:28:59,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:28:59,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:59,481 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:28:59,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:28:59,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:59,709 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:28:59,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:59,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1183086589, now seen corresponding path program 1 times [2022-11-02 20:28:59,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:59,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244548297] [2022-11-02 20:28:59,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:59,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:59,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:59,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244548297] [2022-11-02 20:28:59,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244548297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:28:59,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:28:59,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:28:59,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514547135] [2022-11-02 20:28:59,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:28:59,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:28:59,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:59,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:28:59,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:28:59,803 INFO L87 Difference]: Start difference. First operand 4831 states and 6830 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:00,878 INFO L93 Difference]: Finished difference Result 11235 states and 15832 transitions. [2022-11-02 20:29:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:29:00,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2022-11-02 20:29:00,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:00,913 INFO L225 Difference]: With dead ends: 11235 [2022-11-02 20:29:00,913 INFO L226 Difference]: Without dead ends: 7825 [2022-11-02 20:29:00,919 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 [2022-11-02 20:29:00,920 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 49 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:00,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 199 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:29:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7825 states. [2022-11-02 20:29:01,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7825 to 7823. [2022-11-02 20:29:01,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7823 states, 7822 states have (on average 1.3891587829199694) internal successors, (10866), 7822 states have internal predecessors, (10866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7823 states to 7823 states and 10866 transitions. [2022-11-02 20:29:01,949 INFO L78 Accepts]: Start accepts. Automaton has 7823 states and 10866 transitions. Word has length 67 [2022-11-02 20:29:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:01,949 INFO L495 AbstractCegarLoop]: Abstraction has 7823 states and 10866 transitions. [2022-11-02 20:29:01,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 7823 states and 10866 transitions. [2022-11-02 20:29:01,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:29:01,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:01,953 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:01,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:29:01,954 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:29:01,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:01,955 INFO L85 PathProgramCache]: Analyzing trace with hash -297371507, now seen corresponding path program 1 times [2022-11-02 20:29:01,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:01,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078888422] [2022-11-02 20:29:01,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:01,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:29:02,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:02,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078888422] [2022-11-02 20:29:02,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078888422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:29:02,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:29:02,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:29:02,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344692736] [2022-11-02 20:29:02,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:29:02,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:29:02,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:02,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:29:02,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:29:02,101 INFO L87 Difference]: Start difference. First operand 7823 states and 10866 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:03,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:03,744 INFO L93 Difference]: Finished difference Result 15327 states and 21392 transitions. [2022-11-02 20:29:03,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:29:03,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 67 [2022-11-02 20:29:03,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:03,792 INFO L225 Difference]: With dead ends: 15327 [2022-11-02 20:29:03,792 INFO L226 Difference]: Without dead ends: 11957 [2022-11-02 20:29:03,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:29:03,801 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 279 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:03,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 486 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:29:03,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11957 states. [2022-11-02 20:29:05,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11957 to 10593. [2022-11-02 20:29:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10593 states, 10592 states have (on average 1.3834969788519638) internal successors, (14654), 10592 states have internal predecessors, (14654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:05,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10593 states to 10593 states and 14654 transitions. [2022-11-02 20:29:05,163 INFO L78 Accepts]: Start accepts. Automaton has 10593 states and 14654 transitions. Word has length 67 [2022-11-02 20:29:05,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:05,163 INFO L495 AbstractCegarLoop]: Abstraction has 10593 states and 14654 transitions. [2022-11-02 20:29:05,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 10593 states and 14654 transitions. [2022-11-02 20:29:05,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:29:05,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:05,168 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:05,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:29:05,169 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:29:05,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:05,169 INFO L85 PathProgramCache]: Analyzing trace with hash 129974557, now seen corresponding path program 1 times [2022-11-02 20:29:05,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:05,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533523370] [2022-11-02 20:29:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:05,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:05,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:05,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533523370] [2022-11-02 20:29:05,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533523370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:29:05,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:29:05,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:29:05,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254270834] [2022-11-02 20:29:05,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:29:05,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:29:05,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:05,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:29:05,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:29:05,245 INFO L87 Difference]: Start difference. First operand 10593 states and 14654 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:06,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:06,846 INFO L93 Difference]: Finished difference Result 18149 states and 24986 transitions. [2022-11-02 20:29:06,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:29:06,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2022-11-02 20:29:06,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:06,891 INFO L225 Difference]: With dead ends: 18149 [2022-11-02 20:29:06,891 INFO L226 Difference]: Without dead ends: 11113 [2022-11-02 20:29:06,902 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 [2022-11-02 20:29:06,903 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 52 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:06,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 231 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:29:06,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11113 states. [2022-11-02 20:29:08,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11113 to 10664. [2022-11-02 20:29:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10664 states, 10663 states have (on average 1.3522460845915782) internal successors, (14419), 10663 states have internal predecessors, (14419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10664 states to 10664 states and 14419 transitions. [2022-11-02 20:29:08,498 INFO L78 Accepts]: Start accepts. Automaton has 10664 states and 14419 transitions. Word has length 67 [2022-11-02 20:29:08,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:08,498 INFO L495 AbstractCegarLoop]: Abstraction has 10664 states and 14419 transitions. [2022-11-02 20:29:08,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 10664 states and 14419 transitions. [2022-11-02 20:29:08,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:29:08,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:08,502 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:08,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:29:08,503 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:29:08,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:08,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1562240835, now seen corresponding path program 1 times [2022-11-02 20:29:08,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:08,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797887691] [2022-11-02 20:29:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:08,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:29:08,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:08,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797887691] [2022-11-02 20:29:08,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797887691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:29:08,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:29:08,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:29:08,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675076313] [2022-11-02 20:29:08,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:29:08,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:29:08,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:08,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:29:08,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:29:08,628 INFO L87 Difference]: Start difference. First operand 10664 states and 14419 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:09,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:09,850 INFO L93 Difference]: Finished difference Result 15411 states and 21048 transitions. [2022-11-02 20:29:09,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:29:09,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 67 [2022-11-02 20:29:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:09,888 INFO L225 Difference]: With dead ends: 15411 [2022-11-02 20:29:09,889 INFO L226 Difference]: Without dead ends: 13669 [2022-11-02 20:29:09,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:29:09,898 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 286 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:09,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 482 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:29:09,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13669 states. [2022-11-02 20:29:10,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13669 to 12284. [2022-11-02 20:29:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12284 states, 12283 states have (on average 1.3543108361149556) internal successors, (16635), 12283 states have internal predecessors, (16635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12284 states to 12284 states and 16635 transitions. [2022-11-02 20:29:10,900 INFO L78 Accepts]: Start accepts. Automaton has 12284 states and 16635 transitions. Word has length 67 [2022-11-02 20:29:10,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:10,901 INFO L495 AbstractCegarLoop]: Abstraction has 12284 states and 16635 transitions. [2022-11-02 20:29:10,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 12284 states and 16635 transitions. [2022-11-02 20:29:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:29:10,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:10,905 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:10,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:29:10,906 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:29:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:10,906 INFO L85 PathProgramCache]: Analyzing trace with hash -2062316443, now seen corresponding path program 1 times [2022-11-02 20:29:10,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:10,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540101796] [2022-11-02 20:29:10,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:10,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:29:11,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:11,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540101796] [2022-11-02 20:29:11,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540101796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:29:11,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:29:11,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:29:11,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676066557] [2022-11-02 20:29:11,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:29:11,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:29:11,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:11,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:29:11,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:29:11,023 INFO L87 Difference]: Start difference. First operand 12284 states and 16635 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:12,294 INFO L93 Difference]: Finished difference Result 19196 states and 26179 transitions. [2022-11-02 20:29:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:29:12,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 67 [2022-11-02 20:29:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:12,339 INFO L225 Difference]: With dead ends: 19196 [2022-11-02 20:29:12,339 INFO L226 Difference]: Without dead ends: 16092 [2022-11-02 20:29:12,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:29:12,349 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 281 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:12,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 500 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:29:12,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16092 states. [2022-11-02 20:29:13,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16092 to 14696. [2022-11-02 20:29:13,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14696 states, 14695 states have (on average 1.350187138482477) internal successors, (19841), 14695 states have internal predecessors, (19841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:14,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14696 states to 14696 states and 19841 transitions. [2022-11-02 20:29:14,009 INFO L78 Accepts]: Start accepts. Automaton has 14696 states and 19841 transitions. Word has length 67 [2022-11-02 20:29:14,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:14,009 INFO L495 AbstractCegarLoop]: Abstraction has 14696 states and 19841 transitions. [2022-11-02 20:29:14,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:14,010 INFO L276 IsEmpty]: Start isEmpty. Operand 14696 states and 19841 transitions. [2022-11-02 20:29:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-02 20:29:14,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:14,014 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:14,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:29:14,015 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:29:14,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:14,016 INFO L85 PathProgramCache]: Analyzing trace with hash -762122981, now seen corresponding path program 1 times [2022-11-02 20:29:14,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:14,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397637344] [2022-11-02 20:29:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:14,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:14,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:14,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397637344] [2022-11-02 20:29:14,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397637344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:29:14,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:29:14,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:29:14,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911570525] [2022-11-02 20:29:14,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:29:14,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:29:14,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:14,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:29:14,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:29:14,079 INFO L87 Difference]: Start difference. First operand 14696 states and 19841 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:15,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:15,801 INFO L93 Difference]: Finished difference Result 35614 states and 47892 transitions. [2022-11-02 20:29:15,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:29:15,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2022-11-02 20:29:15,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:15,850 INFO L225 Difference]: With dead ends: 35614 [2022-11-02 20:29:15,851 INFO L226 Difference]: Without dead ends: 21860 [2022-11-02 20:29:15,868 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 [2022-11-02 20:29:15,869 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 50 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:15,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 246 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:29:15,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21860 states. [2022-11-02 20:29:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21860 to 21198. [2022-11-02 20:29:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21198 states, 21197 states have (on average 1.3274519979242345) internal successors, (28138), 21197 states have internal predecessors, (28138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21198 states to 21198 states and 28138 transitions. [2022-11-02 20:29:17,702 INFO L78 Accepts]: Start accepts. Automaton has 21198 states and 28138 transitions. Word has length 70 [2022-11-02 20:29:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:17,703 INFO L495 AbstractCegarLoop]: Abstraction has 21198 states and 28138 transitions. [2022-11-02 20:29:17,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 21198 states and 28138 transitions. [2022-11-02 20:29:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 20:29:17,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:17,709 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:17,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:29:17,710 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:29:17,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:17,710 INFO L85 PathProgramCache]: Analyzing trace with hash -624325544, now seen corresponding path program 1 times [2022-11-02 20:29:17,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:17,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750115047] [2022-11-02 20:29:17,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:17,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:17,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:17,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750115047] [2022-11-02 20:29:17,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750115047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:29:17,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617601800] [2022-11-02 20:29:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:17,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:29:17,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:29:17,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:29:17,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:29:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:18,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:29:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:29:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:18,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:29:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:18,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617601800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:29:18,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:29:18,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-02 20:29:18,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527982198] [2022-11-02 20:29:18,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:29:18,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:29:18,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:18,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:29:18,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:29:18,485 INFO L87 Difference]: Start difference. First operand 21198 states and 28138 transitions. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:23,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:23,841 INFO L93 Difference]: Finished difference Result 64966 states and 86142 transitions. [2022-11-02 20:29:23,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:29:23,841 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 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 71 [2022-11-02 20:29:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:23,916 INFO L225 Difference]: With dead ends: 64966 [2022-11-02 20:29:23,917 INFO L226 Difference]: Without dead ends: 47852 [2022-11-02 20:29:23,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:29:23,941 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1393 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:23,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 369 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:29:23,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47852 states. [2022-11-02 20:29:26,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47852 to 24863. [2022-11-02 20:29:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24863 states, 24862 states have (on average 1.3303837181240448) internal successors, (33076), 24862 states have internal predecessors, (33076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24863 states to 24863 states and 33076 transitions. [2022-11-02 20:29:26,735 INFO L78 Accepts]: Start accepts. Automaton has 24863 states and 33076 transitions. Word has length 71 [2022-11-02 20:29:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:26,735 INFO L495 AbstractCegarLoop]: Abstraction has 24863 states and 33076 transitions. [2022-11-02 20:29:26,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 24863 states and 33076 transitions. [2022-11-02 20:29:26,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 20:29:26,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:26,741 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:26,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-02 20:29:26,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:29:26,966 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:29:26,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:26,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2058940762, now seen corresponding path program 1 times [2022-11-02 20:29:26,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:26,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934928199] [2022-11-02 20:29:26,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:26,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:29:27,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:27,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934928199] [2022-11-02 20:29:27,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934928199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:29:27,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:29:27,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:29:27,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360759387] [2022-11-02 20:29:27,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:29:27,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:29:27,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:27,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:29:27,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:29:27,120 INFO L87 Difference]: Start difference. First operand 24863 states and 33076 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:32,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:32,360 INFO L93 Difference]: Finished difference Result 72841 states and 97019 transitions. [2022-11-02 20:29:32,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:29:32,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 71 [2022-11-02 20:29:32,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:32,430 INFO L225 Difference]: With dead ends: 72841 [2022-11-02 20:29:32,430 INFO L226 Difference]: Without dead ends: 48017 [2022-11-02 20:29:32,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:29:32,455 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 535 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:32,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 206 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:29:32,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48017 states. [2022-11-02 20:29:36,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48017 to 43207. [2022-11-02 20:29:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43207 states, 43206 states have (on average 1.3185668657130953) internal successors, (56970), 43206 states have internal predecessors, (56970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:36,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43207 states to 43207 states and 56970 transitions. [2022-11-02 20:29:36,807 INFO L78 Accepts]: Start accepts. Automaton has 43207 states and 56970 transitions. Word has length 71 [2022-11-02 20:29:36,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:36,807 INFO L495 AbstractCegarLoop]: Abstraction has 43207 states and 56970 transitions. [2022-11-02 20:29:36,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:36,808 INFO L276 IsEmpty]: Start isEmpty. Operand 43207 states and 56970 transitions. [2022-11-02 20:29:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 20:29:36,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:36,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:36,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 20:29:36,816 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:29:36,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:36,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1342540196, now seen corresponding path program 1 times [2022-11-02 20:29:36,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:36,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395981802] [2022-11-02 20:29:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:36,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:36,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:36,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395981802] [2022-11-02 20:29:36,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395981802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:29:36,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404227092] [2022-11-02 20:29:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:36,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:29:36,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:29:36,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:29:37,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_551030ac-eeb2-470f-b8a3-2ed207004206/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:29:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:37,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:29:37,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:29:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:37,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:29:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:29:37,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404227092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:29:37,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:29:37,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-02 20:29:37,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136378424] [2022-11-02 20:29:37,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:29:37,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:29:37,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:37,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:29:37,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:29:37,649 INFO L87 Difference]: Start difference. First operand 43207 states and 56970 transitions. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:29:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:45,265 INFO L93 Difference]: Finished difference Result 94596 states and 123749 transitions. [2022-11-02 20:29:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:29:45,265 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 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 71 [2022-11-02 20:29:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:45,347 INFO L225 Difference]: With dead ends: 94596 [2022-11-02 20:29:45,347 INFO L226 Difference]: Without dead ends: 60750 [2022-11-02 20:29:45,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:29:45,371 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 1441 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:45,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1441 Valid, 281 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:29:45,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60750 states.