./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/gcd02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/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_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/gcd02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/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_d1960070-cdba-4820-a3d3-684a4c462ea6/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 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 --- 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 21:11:10,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:11:10,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:11:10,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:11:10,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:11:10,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:11:10,470 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:11:10,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:11:10,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:11:10,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:11:10,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:11:10,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:11:10,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:11:10,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:11:10,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:11:10,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:11:10,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:11:10,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:11:10,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:11:10,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:11:10,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:11:10,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:11:10,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:11:10,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:11:10,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:11:10,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:11:10,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:11:10,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:11:10,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:11:10,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:11:10,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:11:10,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:11:10,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:11:10,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:11:10,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:11:10,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:11:10,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:11:10,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:11:10,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:11:10,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:11:10,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:11:10,512 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:11:10,535 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:11:10,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:11:10,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:11:10,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:11:10,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:11:10,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:11:10,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:11:10,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:11:10,539 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:11:10,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:11:10,539 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:11:10,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:11:10,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:11:10,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:11:10,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:11:10,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:11:10,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:11:10,541 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:11:10,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:11:10,542 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:11:10,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:11:10,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:11:10,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:11:10,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:11:10,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:11:10,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:11:10,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:11:10,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:11:10,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:11:10,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:11:10,545 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:11:10,546 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:11:10,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:11:10,546 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_d1960070-cdba-4820-a3d3-684a4c462ea6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5840bf8cb045a250261e3957017079dce43a53700f7c91e31c16b36d5b980e00 [2022-11-02 21:11:10,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:11:10,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:11:10,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:11:10,803 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:11:10,804 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:11:10,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/recursive/gcd02.c [2022-11-02 21:11:10,889 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/data/4e8e5a66c/51b751fe525442e9bbd72f340d4dade2/FLAGe7928523d [2022-11-02 21:11:11,453 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:11:11,453 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/sv-benchmarks/c/recursive/gcd02.c [2022-11-02 21:11:11,459 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/data/4e8e5a66c/51b751fe525442e9bbd72f340d4dade2/FLAGe7928523d [2022-11-02 21:11:11,810 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/data/4e8e5a66c/51b751fe525442e9bbd72f340d4dade2 [2022-11-02 21:11:11,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:11:11,815 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:11:11,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:11:11,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:11:11,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:11:11,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:11:11" (1/1) ... [2022-11-02 21:11:11,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb810d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:11, skipping insertion in model container [2022-11-02 21:11:11,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:11:11" (1/1) ... [2022-11-02 21:11:11,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:11:11,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:11:12,081 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_d1960070-cdba-4820-a3d3-684a4c462ea6/sv-benchmarks/c/recursive/gcd02.c[623,636] [2022-11-02 21:11:12,131 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_d1960070-cdba-4820-a3d3-684a4c462ea6/sv-benchmarks/c/recursive/gcd02.c[1283,1296] [2022-11-02 21:11:12,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:11:12,157 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:11:12,168 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_d1960070-cdba-4820-a3d3-684a4c462ea6/sv-benchmarks/c/recursive/gcd02.c[623,636] [2022-11-02 21:11:12,173 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_d1960070-cdba-4820-a3d3-684a4c462ea6/sv-benchmarks/c/recursive/gcd02.c[1283,1296] [2022-11-02 21:11:12,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:11:12,188 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:11:12,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:12 WrapperNode [2022-11-02 21:11:12,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:11:12,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:11:12,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:11:12,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:11:12,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:12" (1/1) ... [2022-11-02 21:11:12,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:12" (1/1) ... [2022-11-02 21:11:12,228 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2022-11-02 21:11:12,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:11:12,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:11:12,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:11:12,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:11:12,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:12" (1/1) ... [2022-11-02 21:11:12,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:12" (1/1) ... [2022-11-02 21:11:12,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:12" (1/1) ... [2022-11-02 21:11:12,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:12" (1/1) ... [2022-11-02 21:11:12,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:12" (1/1) ... [2022-11-02 21:11:12,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:12" (1/1) ... [2022-11-02 21:11:12,260 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:12" (1/1) ... [2022-11-02 21:11:12,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:12" (1/1) ... [2022-11-02 21:11:12,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:11:12,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:11:12,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:11:12,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:11:12,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:12" (1/1) ... [2022-11-02 21:11:12,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:11:12,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:12,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:11:12,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:11:12,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:11:12,349 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2022-11-02 21:11:12,349 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2022-11-02 21:11:12,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:11:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2022-11-02 21:11:12,351 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2022-11-02 21:11:12,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:11:12,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:11:12,414 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:11:12,417 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:11:12,563 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:11:12,569 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:11:12,569 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-02 21:11:12,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:11:12 BoogieIcfgContainer [2022-11-02 21:11:12,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:11:12,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:11:12,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:11:12,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:11:12,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:11:11" (1/3) ... [2022-11-02 21:11:12,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fed93c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:11:12, skipping insertion in model container [2022-11-02 21:11:12,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:12" (2/3) ... [2022-11-02 21:11:12,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fed93c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:11:12, skipping insertion in model container [2022-11-02 21:11:12,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:11:12" (3/3) ... [2022-11-02 21:11:12,585 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd02.c [2022-11-02 21:11:12,605 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:11:12,606 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 21:11:12,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:11:12,674 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;@882dc83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:11:12,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 21:11:12,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 21:11:12,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 21:11:12,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:12,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:12,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:12,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:12,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1041004109, now seen corresponding path program 1 times [2022-11-02 21:11:12,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:12,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996787337] [2022-11-02 21:11:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:12,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:12,981 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 21:11:12,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:12,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996787337] [2022-11-02 21:11:12,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996787337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:12,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:12,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:11:12,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85239996] [2022-11-02 21:11:12,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:12,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:11:12,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:13,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:11:13,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:11:13,053 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 26 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:13,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:13,282 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2022-11-02 21:11:13,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:11:13,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-02 21:11:13,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:13,292 INFO L225 Difference]: With dead ends: 78 [2022-11-02 21:11:13,292 INFO L226 Difference]: Without dead ends: 41 [2022-11-02 21:11:13,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:11:13,299 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 36 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:13,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 133 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:11:13,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-02 21:11:13,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-02 21:11:13,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 21:11:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-11-02 21:11:13,364 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 9 [2022-11-02 21:11:13,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:13,365 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-11-02 21:11:13,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:13,366 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-11-02 21:11:13,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 21:11:13,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:13,369 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:13,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:11:13,370 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1602001293, now seen corresponding path program 1 times [2022-11-02 21:11:13,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:13,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7012931] [2022-11-02 21:11:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:13,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:11:13,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:13,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7012931] [2022-11-02 21:11:13,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7012931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:13,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:13,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:11:13,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632637997] [2022-11-02 21:11:13,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:13,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:11:13,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:13,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:11:13,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:11:13,641 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:13,772 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-11-02 21:11:13,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:11:13,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-02 21:11:13,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:13,776 INFO L225 Difference]: With dead ends: 59 [2022-11-02 21:11:13,779 INFO L226 Difference]: Without dead ends: 57 [2022-11-02 21:11:13,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:11:13,782 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 18 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:13,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 120 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:11:13,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-02 21:11:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2022-11-02 21:11:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 21:11:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-11-02 21:11:13,807 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 14 [2022-11-02 21:11:13,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:13,807 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-11-02 21:11:13,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:13,808 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-11-02 21:11:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 21:11:13,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:13,809 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:13,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:11:13,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting gcdErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:13,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:13,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1599171148, now seen corresponding path program 1 times [2022-11-02 21:11:13,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:13,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894434182] [2022-11-02 21:11:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:13,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:11:14,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:14,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894434182] [2022-11-02 21:11:14,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894434182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:14,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:14,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:11:14,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663732125] [2022-11-02 21:11:14,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:14,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:11:14,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:14,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:11:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:11:14,030 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:14,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:14,188 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2022-11-02 21:11:14,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:11:14,190 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-02 21:11:14,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:14,192 INFO L225 Difference]: With dead ends: 63 [2022-11-02 21:11:14,195 INFO L226 Difference]: Without dead ends: 61 [2022-11-02 21:11:14,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:11:14,199 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 23 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:14,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 147 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:11:14,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-02 21:11:14,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2022-11-02 21:11:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 21:11:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-11-02 21:11:14,231 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 14 [2022-11-02 21:11:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:14,232 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-11-02 21:11:14,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-11-02 21:11:14,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 21:11:14,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:14,237 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] [2022-11-02 21:11:14,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 21:11:14,238 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:14,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2110562560, now seen corresponding path program 1 times [2022-11-02 21:11:14,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:14,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268654787] [2022-11-02 21:11:14,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:14,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:14,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:14,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:11:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:14,383 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 21:11:14,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:14,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268654787] [2022-11-02 21:11:14,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268654787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:14,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:14,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:11:14,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718146644] [2022-11-02 21:11:14,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:14,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:11:14,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:14,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:11:14,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:11:14,386 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:11:14,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:14,415 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-11-02 21:11:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:11:14,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-11-02 21:11:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:14,417 INFO L225 Difference]: With dead ends: 55 [2022-11-02 21:11:14,417 INFO L226 Difference]: Without dead ends: 51 [2022-11-02 21:11:14,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:11:14,419 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:14,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:11:14,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-02 21:11:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-02 21:11:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-02 21:11:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-11-02 21:11:14,432 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 20 [2022-11-02 21:11:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:14,433 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-11-02 21:11:14,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 21:11:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-11-02 21:11:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 21:11:14,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:14,435 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] [2022-11-02 21:11:14,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 21:11:14,435 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:14,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:14,436 INFO L85 PathProgramCache]: Analyzing trace with hash -291106652, now seen corresponding path program 1 times [2022-11-02 21:11:14,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:14,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121967876] [2022-11-02 21:11:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:14,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:14,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:14,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:11:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:14,652 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 21:11:14,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:14,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121967876] [2022-11-02 21:11:14,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121967876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:14,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:14,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 21:11:14,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297133297] [2022-11-02 21:11:14,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:14,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:11:14,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:14,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:11:14,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:11:14,655 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:11:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:14,781 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-11-02 21:11:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:11:14,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-11-02 21:11:14,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:14,784 INFO L225 Difference]: With dead ends: 69 [2022-11-02 21:11:14,784 INFO L226 Difference]: Without dead ends: 65 [2022-11-02 21:11:14,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:11:14,785 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:14,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 100 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:11:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-02 21:11:14,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2022-11-02 21:11:14,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.205128205128205) internal successors, (47), 42 states have internal predecessors, (47), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-02 21:11:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-11-02 21:11:14,798 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 21 [2022-11-02 21:11:14,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:14,798 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-11-02 21:11:14,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:11:14,799 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-11-02 21:11:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 21:11:14,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:14,801 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 21:11:14,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 21:11:14,801 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:14,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:14,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1709846180, now seen corresponding path program 1 times [2022-11-02 21:11:14,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:14,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616269076] [2022-11-02 21:11:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:14,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:14,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:14,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:11:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:14,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:11:14,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:14,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616269076] [2022-11-02 21:11:14,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616269076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:14,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:14,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:11:14,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492300295] [2022-11-02 21:11:14,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:14,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:11:14,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:14,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:11:14,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:11:14,905 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:11:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:14,924 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2022-11-02 21:11:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:11:14,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-11-02 21:11:14,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:14,926 INFO L225 Difference]: With dead ends: 64 [2022-11-02 21:11:14,926 INFO L226 Difference]: Without dead ends: 55 [2022-11-02 21:11:14,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:11:14,928 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:14,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:11:14,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-02 21:11:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-02 21:11:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-02 21:11:14,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-11-02 21:11:14,943 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2022-11-02 21:11:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:14,944 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-11-02 21:11:14,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:11:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-11-02 21:11:14,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:11:14,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:14,946 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:14,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 21:11:14,946 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:14,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:14,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1148028586, now seen corresponding path program 1 times [2022-11-02 21:11:14,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:14,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768521404] [2022-11-02 21:11:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:14,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:15,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:15,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:11:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:15,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:11:15,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:15,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768521404] [2022-11-02 21:11:15,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768521404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:15,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139994557] [2022-11-02 21:11:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:15,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:15,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:15,306 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:15,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:11:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:15,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 21:11:15,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:11:15,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:11:15,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139994557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:15,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:15,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 15 [2022-11-02 21:11:15,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937854516] [2022-11-02 21:11:15,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:15,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 21:11:15,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:15,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 21:11:15,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-02 21:11:15,838 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 21:11:16,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:16,066 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2022-11-02 21:11:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 21:11:16,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-11-02 21:11:16,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:16,073 INFO L225 Difference]: With dead ends: 63 [2022-11-02 21:11:16,073 INFO L226 Difference]: Without dead ends: 55 [2022-11-02 21:11:16,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:11:16,076 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:16,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 152 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:11:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-02 21:11:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-11-02 21:11:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 21:11:16,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-11-02 21:11:16,095 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 28 [2022-11-02 21:11:16,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:16,096 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-11-02 21:11:16,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 21:11:16,096 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-11-02 21:11:16,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 21:11:16,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:16,097 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:16,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:16,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:16,298 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:16,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:16,299 INFO L85 PathProgramCache]: Analyzing trace with hash -729806600, now seen corresponding path program 1 times [2022-11-02 21:11:16,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:16,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902061531] [2022-11-02 21:11:16,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:16,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:16,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:16,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:16,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 21:11:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:11:16,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:16,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902061531] [2022-11-02 21:11:16,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902061531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:16,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541114080] [2022-11-02 21:11:16,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:16,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:16,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:16,545 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:16,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:11:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:16,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 21:11:16,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:11:16,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:11:17,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541114080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:17,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:17,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-11-02 21:11:17,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387408061] [2022-11-02 21:11:17,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:17,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 21:11:17,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:17,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 21:11:17,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:11:17,132 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-02 21:11:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:17,370 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-11-02 21:11:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 21:11:17,371 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 29 [2022-11-02 21:11:17,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:17,372 INFO L225 Difference]: With dead ends: 74 [2022-11-02 21:11:17,373 INFO L226 Difference]: Without dead ends: 70 [2022-11-02 21:11:17,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:11:17,374 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:17,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 202 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:11:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-02 21:11:17,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2022-11-02 21:11:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-02 21:11:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2022-11-02 21:11:17,385 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 29 [2022-11-02 21:11:17,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:17,385 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2022-11-02 21:11:17,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-02 21:11:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2022-11-02 21:11:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 21:11:17,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:17,387 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:17,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:17,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:17,615 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:17,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:17,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1241581992, now seen corresponding path program 1 times [2022-11-02 21:11:17,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:17,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886940804] [2022-11-02 21:11:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:17,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:17,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:17,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:17,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 21:11:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:11:17,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:17,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886940804] [2022-11-02 21:11:17,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886940804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:17,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:17,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 21:11:17,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984896785] [2022-11-02 21:11:17,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:17,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:11:17,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:11:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:11:17,810 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:11:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:17,964 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-11-02 21:11:17,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:11:17,964 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-11-02 21:11:17,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:17,965 INFO L225 Difference]: With dead ends: 80 [2022-11-02 21:11:17,966 INFO L226 Difference]: Without dead ends: 76 [2022-11-02 21:11:17,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:11:17,968 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:17,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 113 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:11:17,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-02 21:11:17,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2022-11-02 21:11:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (19), 14 states have call predecessors, (19), 10 states have call successors, (19) [2022-11-02 21:11:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2022-11-02 21:11:17,986 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 29 [2022-11-02 21:11:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:17,986 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2022-11-02 21:11:17,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:11:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2022-11-02 21:11:17,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 21:11:17,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:17,991 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] [2022-11-02 21:11:17,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 21:11:17,992 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:17,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:17,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2029271682, now seen corresponding path program 1 times [2022-11-02 21:11:17,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:17,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078645220] [2022-11-02 21:11:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:17,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:18,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:18,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:18,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 21:11:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:18,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:11:18,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:18,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078645220] [2022-11-02 21:11:18,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078645220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:18,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230432149] [2022-11-02 21:11:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:18,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:18,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:18,257 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:18,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:11:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:18,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-02 21:11:18,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:11:18,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:11:19,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230432149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:19,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:19,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 21 [2022-11-02 21:11:19,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020614387] [2022-11-02 21:11:19,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:19,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 21:11:19,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:19,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 21:11:19,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-11-02 21:11:19,090 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:11:19,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:19,394 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2022-11-02 21:11:19,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 21:11:19,394 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Word has length 36 [2022-11-02 21:11:19,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:19,395 INFO L225 Difference]: With dead ends: 89 [2022-11-02 21:11:19,395 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 21:11:19,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-11-02 21:11:19,397 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:19,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 185 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:11:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 21:11:19,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2022-11-02 21:11:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 11 states have call successors, (11), 4 states have call predecessors, (11), 11 states have return successors, (27), 17 states have call predecessors, (27), 11 states have call successors, (27) [2022-11-02 21:11:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2022-11-02 21:11:19,408 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 36 [2022-11-02 21:11:19,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:19,409 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2022-11-02 21:11:19,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:11:19,415 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2022-11-02 21:11:19,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 21:11:19,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:19,418 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] [2022-11-02 21:11:19,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:19,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 21:11:19,631 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:19,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:19,631 INFO L85 PathProgramCache]: Analyzing trace with hash -122584798, now seen corresponding path program 1 times [2022-11-02 21:11:19,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:19,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000977752] [2022-11-02 21:11:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:19,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:19,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:19,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:19,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 21:11:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:19,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:11:19,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:19,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000977752] [2022-11-02 21:11:19,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000977752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:19,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268059216] [2022-11-02 21:11:19,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:19,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:19,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:19,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:19,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:11:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:20,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 21:11:20,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:11:20,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:11:20,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268059216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:20,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:20,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 16 [2022-11-02 21:11:20,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832215071] [2022-11-02 21:11:20,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:20,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 21:11:20,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:20,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 21:11:20,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-02 21:11:20,442 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-02 21:11:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:20,669 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2022-11-02 21:11:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 21:11:20,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 36 [2022-11-02 21:11:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:20,671 INFO L225 Difference]: With dead ends: 84 [2022-11-02 21:11:20,671 INFO L226 Difference]: Without dead ends: 75 [2022-11-02 21:11:20,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:11:20,672 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:20,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 145 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:11:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-02 21:11:20,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-11-02 21:11:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 11 states have call successors, (11), 4 states have call predecessors, (11), 11 states have return successors, (26), 16 states have call predecessors, (26), 11 states have call successors, (26) [2022-11-02 21:11:20,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2022-11-02 21:11:20,681 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 36 [2022-11-02 21:11:20,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:20,681 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2022-11-02 21:11:20,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-02 21:11:20,682 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2022-11-02 21:11:20,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:11:20,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:20,683 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:20,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:20,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:20,911 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:20,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1326914756, now seen corresponding path program 1 times [2022-11-02 21:11:20,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:20,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289191784] [2022-11-02 21:11:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:20,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:21,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:21,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:21,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:21,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:11:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:11:21,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:21,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289191784] [2022-11-02 21:11:21,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289191784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:21,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367567250] [2022-11-02 21:11:21,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:21,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:21,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:21,257 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:21,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:11:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:21,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 21:11:21,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:11:21,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:11:22,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367567250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:22,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:22,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 39 [2022-11-02 21:11:22,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831346926] [2022-11-02 21:11:22,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:22,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-02 21:11:22,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:22,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-02 21:11:22,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 21:11:22,591 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 39 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-11-02 21:11:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:23,481 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2022-11-02 21:11:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 21:11:23,481 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 37 [2022-11-02 21:11:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:23,482 INFO L225 Difference]: With dead ends: 103 [2022-11-02 21:11:23,482 INFO L226 Difference]: Without dead ends: 99 [2022-11-02 21:11:23,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=351, Invalid=2199, Unknown=0, NotChecked=0, Total=2550 [2022-11-02 21:11:23,485 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:23,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 455 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:11:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-02 21:11:23,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 68. [2022-11-02 21:11:23,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 49 states have internal predecessors, (52), 11 states have call successors, (11), 4 states have call predecessors, (11), 10 states have return successors, (23), 14 states have call predecessors, (23), 11 states have call successors, (23) [2022-11-02 21:11:23,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2022-11-02 21:11:23,494 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 37 [2022-11-02 21:11:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:23,495 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2022-11-02 21:11:23,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 9 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-11-02 21:11:23,495 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2022-11-02 21:11:23,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 21:11:23,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:23,496 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:23,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:23,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:23,716 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:23,717 INFO L85 PathProgramCache]: Analyzing trace with hash -238590844, now seen corresponding path program 2 times [2022-11-02 21:11:23,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:23,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300510241] [2022-11-02 21:11:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:23,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:23,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:23,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:23,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:23,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:11:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 21:11:23,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:23,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300510241] [2022-11-02 21:11:23,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300510241] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:23,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229365199] [2022-11-02 21:11:23,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:11:23,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:23,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:23,965 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:23,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:11:24,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:11:24,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:24,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:11:24,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:11:24,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:11:24,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229365199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:24,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:24,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 15] total 23 [2022-11-02 21:11:24,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115114687] [2022-11-02 21:11:24,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:24,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 21:11:24,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:24,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 21:11:24,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-11-02 21:11:24,851 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 23 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-02 21:11:25,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:25,233 INFO L93 Difference]: Finished difference Result 81 states and 105 transitions. [2022-11-02 21:11:25,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 21:11:25,234 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 37 [2022-11-02 21:11:25,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:25,235 INFO L225 Difference]: With dead ends: 81 [2022-11-02 21:11:25,235 INFO L226 Difference]: Without dead ends: 77 [2022-11-02 21:11:25,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 21:11:25,236 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:25,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 172 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:11:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-02 21:11:25,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2022-11-02 21:11:25,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 10 states have call successors, (10), 4 states have call predecessors, (10), 9 states have return successors, (19), 13 states have call predecessors, (19), 10 states have call successors, (19) [2022-11-02 21:11:25,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2022-11-02 21:11:25,243 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 37 [2022-11-02 21:11:25,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:25,244 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2022-11-02 21:11:25,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-02 21:11:25,244 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2022-11-02 21:11:25,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-02 21:11:25,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:25,245 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-02 21:11:25,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:25,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 21:11:25,459 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:25,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:25,459 INFO L85 PathProgramCache]: Analyzing trace with hash -124726374, now seen corresponding path program 2 times [2022-11-02 21:11:25,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:25,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989201771] [2022-11-02 21:11:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:25,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:25,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:25,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:25,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 21:11:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:25,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:25,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:11:25,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:25,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989201771] [2022-11-02 21:11:25,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989201771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:25,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20591665] [2022-11-02 21:11:25,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:11:25,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:25,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:25,879 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:25,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:11:25,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:11:25,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:25,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-02 21:11:25,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 21:11:26,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:11:26,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20591665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:26,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:26,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 24 [2022-11-02 21:11:26,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642571353] [2022-11-02 21:11:26,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:26,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 21:11:26,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:26,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 21:11:26,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-11-02 21:11:26,847 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 24 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-02 21:11:27,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:27,316 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-11-02 21:11:27,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:11:27,316 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) Word has length 43 [2022-11-02 21:11:27,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:27,317 INFO L225 Difference]: With dead ends: 76 [2022-11-02 21:11:27,317 INFO L226 Difference]: Without dead ends: 67 [2022-11-02 21:11:27,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-11-02 21:11:27,318 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 35 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:27,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 253 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:11:27,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-02 21:11:27,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2022-11-02 21:11:27,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 9 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (14), 10 states have call predecessors, (14), 9 states have call successors, (14) [2022-11-02 21:11:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-11-02 21:11:27,326 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 43 [2022-11-02 21:11:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:27,327 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-11-02 21:11:27,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-02 21:11:27,327 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-11-02 21:11:27,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 21:11:27,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:27,329 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:27,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:27,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:27,543 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:27,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:27,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1996237866, now seen corresponding path program 3 times [2022-11-02 21:11:27,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:27,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711465162] [2022-11-02 21:11:27,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:27,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:27,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:27,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:27,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:27,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:11:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:27,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 21:11:27,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:27,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711465162] [2022-11-02 21:11:27,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711465162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:27,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819550351] [2022-11-02 21:11:27,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:11:27,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:27,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:27,917 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:27,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:11:27,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 21:11:27,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:27,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 21:11:27,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:11:28,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:11:29,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819550351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:29,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:29,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 36 [2022-11-02 21:11:29,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161274112] [2022-11-02 21:11:29,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:29,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 21:11:29,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:29,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 21:11:29,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 21:11:29,497 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 36 states, 34 states have (on average 2.235294117647059) internal successors, (76), 29 states have internal predecessors, (76), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-02 21:11:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:30,036 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2022-11-02 21:11:30,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 21:11:30,037 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.235294117647059) internal successors, (76), 29 states have internal predecessors, (76), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) Word has length 44 [2022-11-02 21:11:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:30,037 INFO L225 Difference]: With dead ends: 86 [2022-11-02 21:11:30,037 INFO L226 Difference]: Without dead ends: 82 [2022-11-02 21:11:30,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 21:11:30,039 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:30,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 326 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:11:30,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-02 21:11:30,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 67. [2022-11-02 21:11:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 48 states have internal predecessors, (52), 10 states have call successors, (10), 4 states have call predecessors, (10), 10 states have return successors, (21), 14 states have call predecessors, (21), 10 states have call successors, (21) [2022-11-02 21:11:30,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2022-11-02 21:11:30,045 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 44 [2022-11-02 21:11:30,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:30,046 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2022-11-02 21:11:30,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.235294117647059) internal successors, (76), 29 states have internal predecessors, (76), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-02 21:11:30,046 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2022-11-02 21:11:30,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 21:11:30,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:30,047 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:30,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:30,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 21:11:30,267 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:30,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:30,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1270773450, now seen corresponding path program 1 times [2022-11-02 21:11:30,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:30,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104556557] [2022-11-02 21:11:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:30,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:30,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:30,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:30,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:30,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:11:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:30,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 21:11:30,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:30,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104556557] [2022-11-02 21:11:30,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104556557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:30,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375325676] [2022-11-02 21:11:30,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:30,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:30,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:30,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:30,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 21:11:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:30,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 21:11:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 21:11:31,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:11:32,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375325676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:32,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:32,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 17] total 33 [2022-11-02 21:11:32,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112282245] [2022-11-02 21:11:32,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:32,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:11:32,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:32,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:11:32,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 21:11:32,041 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 33 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 26 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-02 21:11:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:32,844 INFO L93 Difference]: Finished difference Result 112 states and 147 transitions. [2022-11-02 21:11:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 21:11:32,845 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 26 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) Word has length 44 [2022-11-02 21:11:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:32,846 INFO L225 Difference]: With dead ends: 112 [2022-11-02 21:11:32,846 INFO L226 Difference]: Without dead ends: 108 [2022-11-02 21:11:32,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 21:11:32,848 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 52 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:32,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 420 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:11:32,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-02 21:11:32,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 71. [2022-11-02 21:11:32,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 50 states have internal predecessors, (55), 10 states have call successors, (10), 4 states have call predecessors, (10), 11 states have return successors, (24), 16 states have call predecessors, (24), 10 states have call successors, (24) [2022-11-02 21:11:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2022-11-02 21:11:32,859 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 44 [2022-11-02 21:11:32,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:32,860 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2022-11-02 21:11:32,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 26 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-02 21:11:32,860 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2022-11-02 21:11:32,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 21:11:32,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:32,861 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:32,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:33,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 21:11:33,075 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:33,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:33,075 INFO L85 PathProgramCache]: Analyzing trace with hash 132450678, now seen corresponding path program 2 times [2022-11-02 21:11:33,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:33,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778762754] [2022-11-02 21:11:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:33,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:33,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:33,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:33,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:33,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:11:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:33,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:11:33,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:33,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778762754] [2022-11-02 21:11:33,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778762754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:33,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274742649] [2022-11-02 21:11:33,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:11:33,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:33,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:33,375 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:33,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 21:11:33,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:11:33,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:33,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 21:11:33,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 21:11:33,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 21:11:34,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274742649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:34,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:34,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 22 [2022-11-02 21:11:34,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683827039] [2022-11-02 21:11:34,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:34,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 21:11:34,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:34,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 21:11:34,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:11:34,421 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 19 states have internal predecessors, (57), 9 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (11), 5 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-02 21:11:34,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:34,732 INFO L93 Difference]: Finished difference Result 99 states and 126 transitions. [2022-11-02 21:11:34,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 21:11:34,733 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 19 states have internal predecessors, (57), 9 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (11), 5 states have call predecessors, (11), 9 states have call successors, (11) Word has length 44 [2022-11-02 21:11:34,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:34,734 INFO L225 Difference]: With dead ends: 99 [2022-11-02 21:11:34,734 INFO L226 Difference]: Without dead ends: 95 [2022-11-02 21:11:34,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-11-02 21:11:34,735 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 33 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:34,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 261 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:11:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-02 21:11:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2022-11-02 21:11:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 54 states have internal predecessors, (60), 10 states have call successors, (10), 4 states have call predecessors, (10), 13 states have return successors, (30), 19 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-02 21:11:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2022-11-02 21:11:34,744 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 44 [2022-11-02 21:11:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:34,744 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2022-11-02 21:11:34,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 19 states have internal predecessors, (57), 9 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (11), 5 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-02 21:11:34,745 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2022-11-02 21:11:34,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 21:11:34,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:34,746 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2022-11-02 21:11:34,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:34,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 21:11:34,946 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:34,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:34,946 INFO L85 PathProgramCache]: Analyzing trace with hash 815065250, now seen corresponding path program 3 times [2022-11-02 21:11:34,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:34,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594849211] [2022-11-02 21:11:34,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:34,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:35,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:35,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:35,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:35,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:35,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 21:11:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:35,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:11:35,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:35,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594849211] [2022-11-02 21:11:35,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594849211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:35,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789975101] [2022-11-02 21:11:35,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:11:35,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:35,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:35,399 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:35,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 21:11:35,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 21:11:35,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:35,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 21:11:35,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 21:11:35,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 21:11:38,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789975101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:38,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:38,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 44 [2022-11-02 21:11:38,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506612976] [2022-11-02 21:11:38,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:38,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-02 21:11:38,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:38,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-02 21:11:38,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 21:11:38,191 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 44 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 32 states have internal predecessors, (89), 16 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-02 21:11:39,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:39,220 INFO L93 Difference]: Finished difference Result 140 states and 182 transitions. [2022-11-02 21:11:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:11:39,220 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 32 states have internal predecessors, (89), 16 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) Word has length 52 [2022-11-02 21:11:39,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:39,222 INFO L225 Difference]: With dead ends: 140 [2022-11-02 21:11:39,222 INFO L226 Difference]: Without dead ends: 136 [2022-11-02 21:11:39,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=326, Invalid=2980, Unknown=0, NotChecked=0, Total=3306 [2022-11-02 21:11:39,224 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:39,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 512 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:11:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-02 21:11:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 86. [2022-11-02 21:11:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 60 states have (on average 1.1) internal successors, (66), 58 states have internal predecessors, (66), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (36), 23 states have call predecessors, (36), 10 states have call successors, (36) [2022-11-02 21:11:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 112 transitions. [2022-11-02 21:11:39,234 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 112 transitions. Word has length 52 [2022-11-02 21:11:39,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:39,235 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 112 transitions. [2022-11-02 21:11:39,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 32 states have internal predecessors, (89), 16 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (18), 14 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-02 21:11:39,235 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 112 transitions. [2022-11-02 21:11:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 21:11:39,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:39,236 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2022-11-02 21:11:39,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:39,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 21:11:39,449 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:39,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:39,450 INFO L85 PathProgramCache]: Analyzing trace with hash 850048834, now seen corresponding path program 4 times [2022-11-02 21:11:39,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:39,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221528270] [2022-11-02 21:11:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:39,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:39,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:39,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:39,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:39,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:39,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 21:11:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:39,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:11:39,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:39,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221528270] [2022-11-02 21:11:39,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221528270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:39,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753190740] [2022-11-02 21:11:39,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:11:39,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:39,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:39,841 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:39,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 21:11:39,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:11:39,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:39,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 21:11:39,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:11:40,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 21:11:41,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753190740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:41,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:41,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 20] total 36 [2022-11-02 21:11:41,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787613091] [2022-11-02 21:11:41,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:41,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 21:11:41,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:41,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 21:11:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 21:11:41,943 INFO L87 Difference]: Start difference. First operand 86 states and 112 transitions. Second operand has 36 states, 33 states have (on average 2.303030303030303) internal successors, (76), 27 states have internal predecessors, (76), 13 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) [2022-11-02 21:11:42,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:42,858 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2022-11-02 21:11:42,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 21:11:42,859 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.303030303030303) internal successors, (76), 27 states have internal predecessors, (76), 13 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) Word has length 52 [2022-11-02 21:11:42,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:42,860 INFO L225 Difference]: With dead ends: 127 [2022-11-02 21:11:42,860 INFO L226 Difference]: Without dead ends: 123 [2022-11-02 21:11:42,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=335, Invalid=2215, Unknown=0, NotChecked=0, Total=2550 [2022-11-02 21:11:42,862 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:42,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 323 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:11:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-02 21:11:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 59. [2022-11-02 21:11:42,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (15), 11 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-02 21:11:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-11-02 21:11:42,869 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 52 [2022-11-02 21:11:42,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:42,870 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-11-02 21:11:42,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.303030303030303) internal successors, (76), 27 states have internal predecessors, (76), 13 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) [2022-11-02 21:11:42,870 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-11-02 21:11:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 21:11:42,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:42,871 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:42,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:43,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:43,091 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:43,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:43,091 INFO L85 PathProgramCache]: Analyzing trace with hash 861262790, now seen corresponding path program 4 times [2022-11-02 21:11:43,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:43,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287386127] [2022-11-02 21:11:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:43,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:43,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:43,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:43,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:43,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:11:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:43,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:43,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:11:43,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:43,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287386127] [2022-11-02 21:11:43,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287386127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:43,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616649853] [2022-11-02 21:11:43,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:11:43,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:43,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:43,488 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:43,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 21:11:43,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:11:43,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:43,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 21:11:43,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:11:43,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:11:45,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616649853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:45,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:45,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 27 [2022-11-02 21:11:45,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468824636] [2022-11-02 21:11:45,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:45,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 21:11:45,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:45,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 21:11:45,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-11-02 21:11:45,032 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-02 21:11:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:45,514 INFO L93 Difference]: Finished difference Result 89 states and 111 transitions. [2022-11-02 21:11:45,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:11:45,519 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) Word has length 51 [2022-11-02 21:11:45,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:45,520 INFO L225 Difference]: With dead ends: 89 [2022-11-02 21:11:45,520 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 21:11:45,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 21:11:45,521 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 57 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:45,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 414 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:11:45,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 21:11:45,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2022-11-02 21:11:45,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 10 states have call successors, (10), 4 states have call predecessors, (10), 11 states have return successors, (22), 15 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-02 21:11:45,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2022-11-02 21:11:45,529 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 51 [2022-11-02 21:11:45,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:45,529 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2022-11-02 21:11:45,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 23 states have internal predecessors, (68), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 7 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-02 21:11:45,530 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2022-11-02 21:11:45,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 21:11:45,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:45,531 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-02 21:11:45,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:45,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:45,748 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:45,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2103225754, now seen corresponding path program 5 times [2022-11-02 21:11:45,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:45,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892290188] [2022-11-02 21:11:45,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:45,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:45,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:45,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:45,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:46,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:11:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:46,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:46,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:11:46,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:46,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892290188] [2022-11-02 21:11:46,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892290188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:46,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247875583] [2022-11-02 21:11:46,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:11:46,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:46,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:46,182 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:46,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 21:11:46,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 21:11:46,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:46,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 21:11:46,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:11:46,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 21:11:47,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247875583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:47,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:47,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18] total 29 [2022-11-02 21:11:47,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933563834] [2022-11-02 21:11:47,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:47,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 21:11:47,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:47,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 21:11:47,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:11:47,696 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 29 states, 28 states have (on average 2.5) internal successors, (70), 24 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-02 21:11:48,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:48,173 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2022-11-02 21:11:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:11:48,174 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.5) internal successors, (70), 24 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) Word has length 51 [2022-11-02 21:11:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:48,175 INFO L225 Difference]: With dead ends: 97 [2022-11-02 21:11:48,175 INFO L226 Difference]: Without dead ends: 93 [2022-11-02 21:11:48,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 21:11:48,177 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:48,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 423 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:11:48,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-02 21:11:48,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2022-11-02 21:11:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.12) internal successors, (56), 52 states have internal predecessors, (56), 10 states have call successors, (10), 4 states have call predecessors, (10), 12 states have return successors, (24), 16 states have call predecessors, (24), 10 states have call successors, (24) [2022-11-02 21:11:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2022-11-02 21:11:48,185 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 51 [2022-11-02 21:11:48,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:48,185 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2022-11-02 21:11:48,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.5) internal successors, (70), 24 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-02 21:11:48,186 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2022-11-02 21:11:48,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 21:11:48,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:48,187 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-02 21:11:48,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:48,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:48,399 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:48,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:48,399 INFO L85 PathProgramCache]: Analyzing trace with hash -262469082, now seen corresponding path program 6 times [2022-11-02 21:11:48,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:48,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334788748] [2022-11-02 21:11:48,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:48,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:48,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:48,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:48,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:48,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:11:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:48,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:48,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:11:48,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:48,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334788748] [2022-11-02 21:11:48,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334788748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:48,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101110586] [2022-11-02 21:11:48,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:11:48,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:48,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:48,871 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:48,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 21:11:49,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-02 21:11:49,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:49,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 21:11:49,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 21:11:49,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 21:11:50,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101110586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:50,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:50,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 34 [2022-11-02 21:11:50,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870251330] [2022-11-02 21:11:50,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:50,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 21:11:50,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:50,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 21:11:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 21:11:50,359 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 34 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 13 states have call successors, (16) [2022-11-02 21:11:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:50,865 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2022-11-02 21:11:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:11:50,871 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 13 states have call successors, (16) Word has length 51 [2022-11-02 21:11:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:50,872 INFO L225 Difference]: With dead ends: 91 [2022-11-02 21:11:50,872 INFO L226 Difference]: Without dead ends: 82 [2022-11-02 21:11:50,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=211, Invalid=1511, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 21:11:50,877 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:50,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 357 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:11:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-02 21:11:50,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2022-11-02 21:11:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 52 states have internal predecessors, (57), 10 states have call successors, (10), 4 states have call predecessors, (10), 12 states have return successors, (24), 17 states have call predecessors, (24), 10 states have call successors, (24) [2022-11-02 21:11:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-11-02 21:11:50,886 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 51 [2022-11-02 21:11:50,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:50,887 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-11-02 21:11:50,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (16), 9 states have call predecessors, (16), 13 states have call successors, (16) [2022-11-02 21:11:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-11-02 21:11:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 21:11:50,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:50,893 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:50,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:51,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-02 21:11:51,107 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:51,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1972765050, now seen corresponding path program 7 times [2022-11-02 21:11:51,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:51,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606247930] [2022-11-02 21:11:51,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:51,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:51,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:51,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:51,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:51,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:51,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 21:11:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:51,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:51,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 21:11:51,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:51,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606247930] [2022-11-02 21:11:51,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606247930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:51,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495376478] [2022-11-02 21:11:51,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:11:51,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:51,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:51,546 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:51,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 21:11:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:51,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 21:11:51,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-02 21:11:51,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 21:11:53,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495376478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:53,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:53,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 28 [2022-11-02 21:11:53,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900674293] [2022-11-02 21:11:53,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:53,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 21:11:53,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:53,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 21:11:53,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-11-02 21:11:53,643 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 28 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 23 states have internal predecessors, (71), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 21:11:54,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:54,081 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2022-11-02 21:11:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 21:11:54,083 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 23 states have internal predecessors, (71), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) Word has length 59 [2022-11-02 21:11:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:54,084 INFO L225 Difference]: With dead ends: 104 [2022-11-02 21:11:54,084 INFO L226 Difference]: Without dead ends: 100 [2022-11-02 21:11:54,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 21:11:54,085 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:54,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 380 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:11:54,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-02 21:11:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2022-11-02 21:11:54,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 14 states have return successors, (30), 20 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-02 21:11:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2022-11-02 21:11:54,093 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 59 [2022-11-02 21:11:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:54,094 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2022-11-02 21:11:54,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 23 states have internal predecessors, (71), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (17), 8 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 21:11:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2022-11-02 21:11:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 21:11:54,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:54,096 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:54,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:54,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-02 21:11:54,321 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash 334535194, now seen corresponding path program 5 times [2022-11-02 21:11:54,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:54,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767143782] [2022-11-02 21:11:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:54,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:54,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:54,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:54,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:54,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:54,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 21:11:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:54,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:54,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:11:54,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:54,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767143782] [2022-11-02 21:11:54,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767143782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:54,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299287390] [2022-11-02 21:11:54,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:11:54,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:54,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:54,820 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:54,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 21:11:55,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 21:11:55,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:55,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-02 21:11:55,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:11:55,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 21:11:57,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299287390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:57,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:57,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 22] total 45 [2022-11-02 21:11:57,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630346921] [2022-11-02 21:11:57,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:57,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-02 21:11:57,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:57,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-02 21:11:57,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1825, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 21:11:57,907 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand has 45 states, 42 states have (on average 2.142857142857143) internal successors, (90), 34 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2022-11-02 21:11:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:11:58,808 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2022-11-02 21:11:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 21:11:58,809 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 2.142857142857143) internal successors, (90), 34 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) Word has length 59 [2022-11-02 21:11:58,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:11:58,810 INFO L225 Difference]: With dead ends: 116 [2022-11-02 21:11:58,810 INFO L226 Difference]: Without dead ends: 112 [2022-11-02 21:11:58,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=310, Invalid=2660, Unknown=0, NotChecked=0, Total=2970 [2022-11-02 21:11:58,812 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 45 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:11:58,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 575 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:11:58,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-02 21:11:58,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 84. [2022-11-02 21:11:58,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.103448275862069) internal successors, (64), 58 states have internal predecessors, (64), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (33), 21 states have call predecessors, (33), 10 states have call successors, (33) [2022-11-02 21:11:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-11-02 21:11:58,820 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 59 [2022-11-02 21:11:58,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:11:58,821 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-11-02 21:11:58,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 2.142857142857143) internal successors, (90), 34 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2022-11-02 21:11:58,821 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-11-02 21:11:58,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 21:11:58,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:11:58,822 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:11:58,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:59,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:59,047 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:11:59,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:59,047 INFO L85 PathProgramCache]: Analyzing trace with hash 12091098, now seen corresponding path program 8 times [2022-11-02 21:11:59,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:59,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234941142] [2022-11-02 21:11:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:59,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:59,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:11:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:59,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:59,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:59,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:11:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:59,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 21:11:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:59,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:59,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:11:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-02 21:11:59,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:59,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234941142] [2022-11-02 21:11:59,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234941142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:59,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477054796] [2022-11-02 21:11:59,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:11:59,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:59,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:59,476 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:59,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 21:11:59,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:11:59,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:59,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 21:11:59,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-02 21:11:59,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:12:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 21:12:01,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477054796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:12:01,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:12:01,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 19] total 30 [2022-11-02 21:12:01,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919691251] [2022-11-02 21:12:01,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:12:01,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 21:12:01,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:12:01,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 21:12:01,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-11-02 21:12:01,509 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 30 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 24 states have internal predecessors, (74), 12 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 9 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 21:12:02,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:12:02,028 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2022-11-02 21:12:02,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 21:12:02,029 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 24 states have internal predecessors, (74), 12 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 9 states have call predecessors, (17), 12 states have call successors, (17) Word has length 59 [2022-11-02 21:12:02,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:12:02,030 INFO L225 Difference]: With dead ends: 113 [2022-11-02 21:12:02,030 INFO L226 Difference]: Without dead ends: 109 [2022-11-02 21:12:02,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 106 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 21:12:02,031 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:12:02,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 447 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:12:02,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-02 21:12:02,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2022-11-02 21:12:02,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.103448275862069) internal successors, (64), 58 states have internal predecessors, (64), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (33), 21 states have call predecessors, (33), 10 states have call successors, (33) [2022-11-02 21:12:02,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2022-11-02 21:12:02,040 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 59 [2022-11-02 21:12:02,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:12:02,040 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2022-11-02 21:12:02,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 24 states have internal predecessors, (74), 12 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (17), 9 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-02 21:12:02,041 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2022-11-02 21:12:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 21:12:02,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:12:02,042 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:12:02,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 21:12:02,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-02 21:12:02,267 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:12:02,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:12:02,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1626138758, now seen corresponding path program 9 times [2022-11-02 21:12:02,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:12:02,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952893744] [2022-11-02 21:12:02,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:12:02,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:12:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:02,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:12:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:02,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:12:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:02,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:12:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:02,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:12:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:02,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 21:12:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:02,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:12:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:02,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:12:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:12:02,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:12:02,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952893744] [2022-11-02 21:12:02,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952893744] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:12:02,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306271487] [2022-11-02 21:12:02,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:12:02,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:12:02,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:12:02,794 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:12:02,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 21:12:03,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 21:12:03,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:12:03,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-02 21:12:03,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:12:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-02 21:12:03,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:12:14,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306271487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:12:14,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:12:14,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2022-11-02 21:12:14,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674056934] [2022-11-02 21:12:14,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:12:14,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 21:12:14,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:12:14,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 21:12:14,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1830, Unknown=1, NotChecked=0, Total=1980 [2022-11-02 21:12:14,256 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-11-02 21:12:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:12:15,448 INFO L93 Difference]: Finished difference Result 151 states and 200 transitions. [2022-11-02 21:12:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:12:15,449 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 59 [2022-11-02 21:12:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:12:15,450 INFO L225 Difference]: With dead ends: 151 [2022-11-02 21:12:15,450 INFO L226 Difference]: Without dead ends: 147 [2022-11-02 21:12:15,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=293, Invalid=2898, Unknown=1, NotChecked=0, Total=3192 [2022-11-02 21:12:15,451 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:12:15,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 616 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 21:12:15,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-02 21:12:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 101. [2022-11-02 21:12:15,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 68 states have internal predecessors, (76), 10 states have call successors, (10), 4 states have call predecessors, (10), 20 states have return successors, (47), 28 states have call predecessors, (47), 10 states have call successors, (47) [2022-11-02 21:12:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2022-11-02 21:12:15,472 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 59 [2022-11-02 21:12:15,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:12:15,474 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2022-11-02 21:12:15,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 25 states have internal predecessors, (61), 11 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-11-02 21:12:15,474 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2022-11-02 21:12:15,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 21:12:15,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:12:15,476 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:12:15,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 21:12:15,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-02 21:12:15,699 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:12:15,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:12:15,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1786558534, now seen corresponding path program 10 times [2022-11-02 21:12:15,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:12:15,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012663847] [2022-11-02 21:12:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:12:15,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:12:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:15,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:12:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:15,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:12:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:15,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:12:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:16,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:12:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:16,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 21:12:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:16,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:12:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:16,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:12:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:12:16,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:12:16,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012663847] [2022-11-02 21:12:16,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012663847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:12:16,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850455091] [2022-11-02 21:12:16,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:12:16,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:12:16,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:12:16,243 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:12:16,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 21:12:16,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:12:16,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:12:16,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-02 21:12:16,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:12:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:12:17,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:12:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 21:12:19,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850455091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:12:19,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:12:19,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 22] total 46 [2022-11-02 21:12:19,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816588292] [2022-11-02 21:12:19,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:12:19,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 21:12:19,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:12:19,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 21:12:19,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1906, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 21:12:19,777 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 46 states, 42 states have (on average 2.142857142857143) internal successors, (90), 35 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2022-11-02 21:12:21,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:12:21,007 INFO L93 Difference]: Finished difference Result 160 states and 207 transitions. [2022-11-02 21:12:21,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 21:12:21,008 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 2.142857142857143) internal successors, (90), 35 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) Word has length 59 [2022-11-02 21:12:21,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:12:21,009 INFO L225 Difference]: With dead ends: 160 [2022-11-02 21:12:21,009 INFO L226 Difference]: Without dead ends: 156 [2022-11-02 21:12:21,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=411, Invalid=3249, Unknown=0, NotChecked=0, Total=3660 [2022-11-02 21:12:21,011 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 43 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:12:21,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 759 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 21:12:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-02 21:12:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 98. [2022-11-02 21:12:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 68 states have (on average 1.088235294117647) internal successors, (74), 66 states have internal predecessors, (74), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (44), 27 states have call predecessors, (44), 10 states have call successors, (44) [2022-11-02 21:12:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2022-11-02 21:12:21,023 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 59 [2022-11-02 21:12:21,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:12:21,023 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2022-11-02 21:12:21,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 2.142857142857143) internal successors, (90), 35 states have internal predecessors, (90), 17 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (21), 14 states have call predecessors, (21), 17 states have call successors, (21) [2022-11-02 21:12:21,024 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2022-11-02 21:12:21,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 21:12:21,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:12:21,025 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:12:21,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 21:12:21,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-02 21:12:21,239 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:12:21,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:12:21,239 INFO L85 PathProgramCache]: Analyzing trace with hash 547734810, now seen corresponding path program 11 times [2022-11-02 21:12:21,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:12:21,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581703964] [2022-11-02 21:12:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:12:21,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:12:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:21,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:12:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:21,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:12:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:21,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:12:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:21,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:12:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:21,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 21:12:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:21,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:12:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:21,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:12:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 21:12:21,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:12:21,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581703964] [2022-11-02 21:12:21,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581703964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:12:21,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602018763] [2022-11-02 21:12:21,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:12:21,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:12:21,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:12:21,806 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:12:21,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 21:12:22,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 21:12:22,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:12:22,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-02 21:12:22,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:12:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 21:12:22,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:12:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 21:12:24,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602018763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:12:24,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:12:24,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 22] total 41 [2022-11-02 21:12:24,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381435962] [2022-11-02 21:12:24,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:12:24,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-02 21:12:24,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:12:24,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-02 21:12:24,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 21:12:24,369 INFO L87 Difference]: Start difference. First operand 98 states and 128 transitions. Second operand has 41 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 32 states have internal predecessors, (83), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (19), 12 states have call predecessors, (19), 15 states have call successors, (19) [2022-11-02 21:12:25,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:12:25,423 INFO L93 Difference]: Finished difference Result 171 states and 228 transitions. [2022-11-02 21:12:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 21:12:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 32 states have internal predecessors, (83), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (19), 12 states have call predecessors, (19), 15 states have call successors, (19) Word has length 59 [2022-11-02 21:12:25,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:12:25,427 INFO L225 Difference]: With dead ends: 171 [2022-11-02 21:12:25,427 INFO L226 Difference]: Without dead ends: 167 [2022-11-02 21:12:25,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 96 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=355, Invalid=2725, Unknown=0, NotChecked=0, Total=3080 [2022-11-02 21:12:25,428 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 57 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:12:25,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 580 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:12:25,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-02 21:12:25,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 107. [2022-11-02 21:12:25,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 72 states have internal predecessors, (80), 10 states have call successors, (10), 4 states have call predecessors, (10), 22 states have return successors, (53), 30 states have call predecessors, (53), 10 states have call successors, (53) [2022-11-02 21:12:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 143 transitions. [2022-11-02 21:12:25,442 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 143 transitions. Word has length 59 [2022-11-02 21:12:25,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:12:25,442 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 143 transitions. [2022-11-02 21:12:25,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 32 states have internal predecessors, (83), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (19), 12 states have call predecessors, (19), 15 states have call successors, (19) [2022-11-02 21:12:25,443 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 143 transitions. [2022-11-02 21:12:25,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 21:12:25,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:12:25,444 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:12:25,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-02 21:12:25,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:12:25,671 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:12:25,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:12:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash 789094822, now seen corresponding path program 12 times [2022-11-02 21:12:25,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:12:25,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061218635] [2022-11-02 21:12:25,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:12:25,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:12:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:25,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:12:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:25,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:12:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:26,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:12:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:26,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:12:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:26,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:12:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:26,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-02 21:12:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:26,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:12:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:26,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:12:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 21:12:26,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:12:26,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061218635] [2022-11-02 21:12:26,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061218635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:12:26,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737217891] [2022-11-02 21:12:26,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:12:26,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:12:26,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:12:26,343 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:12:26,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 21:12:26,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-02 21:12:26,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:12:26,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 21:12:26,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:12:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:12:27,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:13:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:13:27,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737217891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:13:27,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:13:27,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 25] total 47 [2022-11-02 21:13:27,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447785830] [2022-11-02 21:13:27,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:13:27,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-02 21:13:27,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:13:27,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-02 21:13:27,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1977, Unknown=21, NotChecked=0, Total=2162 [2022-11-02 21:13:27,586 INFO L87 Difference]: Start difference. First operand 107 states and 143 transitions. Second operand has 47 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 36 states have internal predecessors, (96), 18 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (22), 14 states have call predecessors, (22), 18 states have call successors, (22) [2022-11-02 21:13:29,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:13:29,328 INFO L93 Difference]: Finished difference Result 180 states and 244 transitions. [2022-11-02 21:13:29,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 21:13:29,329 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 36 states have internal predecessors, (96), 18 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (22), 14 states have call predecessors, (22), 18 states have call successors, (22) Word has length 67 [2022-11-02 21:13:29,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:13:29,331 INFO L225 Difference]: With dead ends: 180 [2022-11-02 21:13:29,331 INFO L226 Difference]: Without dead ends: 176 [2022-11-02 21:13:29,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 111 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 59.3s TimeCoverageRelationStatistics Valid=506, Invalid=3633, Unknown=21, NotChecked=0, Total=4160 [2022-11-02 21:13:29,333 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 68 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:13:29,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 627 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1100 Invalid, 0 Unknown, 21 Unchecked, 0.8s Time] [2022-11-02 21:13:29,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-02 21:13:29,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 108. [2022-11-02 21:13:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 75 states have (on average 1.08) internal successors, (81), 72 states have internal predecessors, (81), 10 states have call successors, (10), 4 states have call predecessors, (10), 22 states have return successors, (53), 31 states have call predecessors, (53), 10 states have call successors, (53) [2022-11-02 21:13:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 144 transitions. [2022-11-02 21:13:29,356 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 144 transitions. Word has length 67 [2022-11-02 21:13:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:13:29,357 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 144 transitions. [2022-11-02 21:13:29,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 36 states have internal predecessors, (96), 18 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (22), 14 states have call predecessors, (22), 18 states have call successors, (22) [2022-11-02 21:13:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 144 transitions. [2022-11-02 21:13:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 21:13:29,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:13:29,359 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:13:29,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-02 21:13:29,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-02 21:13:29,583 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:13:29,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:13:29,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1906616390, now seen corresponding path program 13 times [2022-11-02 21:13:29,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:13:29,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587399550] [2022-11-02 21:13:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:13:29,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:13:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:29,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:13:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:29,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:29,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:30,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:30,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:30,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-02 21:13:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:30,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:13:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:30,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:13:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-02 21:13:30,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:13:30,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587399550] [2022-11-02 21:13:30,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587399550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:13:30,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032966951] [2022-11-02 21:13:30,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:13:30,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:13:30,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:13:30,392 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:13:30,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-02 21:13:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:30,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-02 21:13:30,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:13:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 21:13:31,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:13:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 21:13:34,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032966951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:13:34,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:13:34,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 25] total 44 [2022-11-02 21:13:34,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762522972] [2022-11-02 21:13:34,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:13:34,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-02 21:13:34,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:13:34,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-02 21:13:34,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 21:13:34,569 INFO L87 Difference]: Start difference. First operand 108 states and 144 transitions. Second operand has 44 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 34 states have internal predecessors, (90), 18 states have call successors, (20), 1 states have call predecessors, (20), 11 states have return successors, (24), 13 states have call predecessors, (24), 18 states have call successors, (24) [2022-11-02 21:13:36,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:13:36,124 INFO L93 Difference]: Finished difference Result 180 states and 246 transitions. [2022-11-02 21:13:36,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 21:13:36,130 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 34 states have internal predecessors, (90), 18 states have call successors, (20), 1 states have call predecessors, (20), 11 states have return successors, (24), 13 states have call predecessors, (24), 18 states have call successors, (24) Word has length 67 [2022-11-02 21:13:36,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:13:36,131 INFO L225 Difference]: With dead ends: 180 [2022-11-02 21:13:36,132 INFO L226 Difference]: Without dead ends: 176 [2022-11-02 21:13:36,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 114 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=468, Invalid=3314, Unknown=0, NotChecked=0, Total=3782 [2022-11-02 21:13:36,134 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 40 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:13:36,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 757 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 21:13:36,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-02 21:13:36,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 104. [2022-11-02 21:13:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 70 states have internal predecessors, (78), 10 states have call successors, (10), 4 states have call predecessors, (10), 21 states have return successors, (50), 29 states have call predecessors, (50), 10 states have call successors, (50) [2022-11-02 21:13:36,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 138 transitions. [2022-11-02 21:13:36,150 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 138 transitions. Word has length 67 [2022-11-02 21:13:36,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:13:36,151 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 138 transitions. [2022-11-02 21:13:36,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 34 states have internal predecessors, (90), 18 states have call successors, (20), 1 states have call predecessors, (20), 11 states have return successors, (24), 13 states have call predecessors, (24), 18 states have call successors, (24) [2022-11-02 21:13:36,152 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 138 transitions. [2022-11-02 21:13:36,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 21:13:36,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:13:36,153 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:13:36,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-02 21:13:36,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:13:36,375 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:13:36,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:13:36,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1155297274, now seen corresponding path program 14 times [2022-11-02 21:13:36,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:13:36,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488499256] [2022-11-02 21:13:36,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:13:36,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:13:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:36,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:13:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:36,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:36,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:36,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:36,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:36,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-02 21:13:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:37,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:13:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:37,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:13:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:13:37,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:13:37,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488499256] [2022-11-02 21:13:37,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488499256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:13:37,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820237257] [2022-11-02 21:13:37,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:13:37,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:13:37,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:13:37,167 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:13:37,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-02 21:13:37,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:13:37,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:13:37,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-02 21:13:37,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:13:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 21:13:38,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:13:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 21:13:41,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820237257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:13:41,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:13:41,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 25] total 48 [2022-11-02 21:13:41,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796729661] [2022-11-02 21:13:41,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:13:41,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-02 21:13:41,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:13:41,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-02 21:13:41,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2090, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 21:13:41,215 INFO L87 Difference]: Start difference. First operand 104 states and 138 transitions. Second operand has 48 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 35 states have internal predecessors, (95), 18 states have call successors, (19), 1 states have call predecessors, (19), 13 states have return successors, (23), 16 states have call predecessors, (23), 18 states have call successors, (23) [2022-11-02 21:13:42,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:13:42,546 INFO L93 Difference]: Finished difference Result 174 states and 238 transitions. [2022-11-02 21:13:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 21:13:42,547 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 35 states have internal predecessors, (95), 18 states have call successors, (19), 1 states have call predecessors, (19), 13 states have return successors, (23), 16 states have call predecessors, (23), 18 states have call successors, (23) Word has length 67 [2022-11-02 21:13:42,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:13:42,549 INFO L225 Difference]: With dead ends: 174 [2022-11-02 21:13:42,549 INFO L226 Difference]: Without dead ends: 170 [2022-11-02 21:13:42,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 110 SyntacticMatches, 10 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=389, Invalid=3393, Unknown=0, NotChecked=0, Total=3782 [2022-11-02 21:13:42,550 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 50 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:13:42,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 674 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 21:13:42,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-02 21:13:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 96. [2022-11-02 21:13:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (44), 25 states have call predecessors, (44), 10 states have call successors, (44) [2022-11-02 21:13:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2022-11-02 21:13:42,565 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 67 [2022-11-02 21:13:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:13:42,565 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2022-11-02 21:13:42,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 35 states have internal predecessors, (95), 18 states have call successors, (19), 1 states have call predecessors, (19), 13 states have return successors, (23), 16 states have call predecessors, (23), 18 states have call successors, (23) [2022-11-02 21:13:42,566 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2022-11-02 21:13:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 21:13:42,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:13:42,567 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:13:42,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-02 21:13:42,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:13:42,788 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:13:42,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:13:42,789 INFO L85 PathProgramCache]: Analyzing trace with hash -37775706, now seen corresponding path program 15 times [2022-11-02 21:13:42,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:13:42,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789764364] [2022-11-02 21:13:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:13:42,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:13:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:42,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:13:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:43,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:43,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:43,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:43,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:43,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-02 21:13:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:43,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:13:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:43,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:13:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 21:13:43,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:13:43,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789764364] [2022-11-02 21:13:43,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789764364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:13:43,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028015590] [2022-11-02 21:13:43,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:13:43,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:13:43,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:13:43,606 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:13:43,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-02 21:13:44,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-02 21:13:44,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:13:44,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-02 21:13:44,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:13:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 21:13:44,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:13:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 63 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 21:13:48,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028015590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:13:48,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:13:48,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 25] total 52 [2022-11-02 21:13:48,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388453035] [2022-11-02 21:13:48,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:13:48,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-02 21:13:48,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:13:48,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-02 21:13:48,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2478, Unknown=0, NotChecked=0, Total=2652 [2022-11-02 21:13:48,814 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand has 52 states, 49 states have (on average 2.122448979591837) internal successors, (104), 38 states have internal predecessors, (104), 18 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (23), 17 states have call predecessors, (23), 18 states have call successors, (23) [2022-11-02 21:13:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:13:51,207 INFO L93 Difference]: Finished difference Result 172 states and 231 transitions. [2022-11-02 21:13:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 21:13:51,208 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 2.122448979591837) internal successors, (104), 38 states have internal predecessors, (104), 18 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (23), 17 states have call predecessors, (23), 18 states have call successors, (23) Word has length 67 [2022-11-02 21:13:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:13:51,210 INFO L225 Difference]: With dead ends: 172 [2022-11-02 21:13:51,210 INFO L226 Difference]: Without dead ends: 168 [2022-11-02 21:13:51,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 111 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=464, Invalid=4506, Unknown=0, NotChecked=0, Total=4970 [2022-11-02 21:13:51,212 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 70 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:13:51,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 640 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 21:13:51,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-02 21:13:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 63. [2022-11-02 21:13:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 45 states have internal predecessors, (50), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (16), 13 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-02 21:13:51,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-11-02 21:13:51,222 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 67 [2022-11-02 21:13:51,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:13:51,223 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-11-02 21:13:51,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 2.122448979591837) internal successors, (104), 38 states have internal predecessors, (104), 18 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (23), 17 states have call predecessors, (23), 18 states have call successors, (23) [2022-11-02 21:13:51,223 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-11-02 21:13:51,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-02 21:13:51,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:13:51,224 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:13:51,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-02 21:13:51,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-02 21:13:51,451 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:13:51,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:13:51,451 INFO L85 PathProgramCache]: Analyzing trace with hash -835098444, now seen corresponding path program 6 times [2022-11-02 21:13:51,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:13:51,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944109087] [2022-11-02 21:13:51,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:13:51,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:13:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:51,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:13:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:51,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:51,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:51,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:13:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:51,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:13:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:51,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:13:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:51,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:13:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:13:52,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:13:52,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944109087] [2022-11-02 21:13:52,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944109087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:13:52,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352483212] [2022-11-02 21:13:52,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:13:52,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:13:52,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:13:52,072 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:13:52,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-02 21:13:52,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-02 21:13:52,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:13:52,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-02 21:13:52,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:13:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:13:52,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:13:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 21:13:54,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352483212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:13:54,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:13:54,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 40 [2022-11-02 21:13:54,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995647450] [2022-11-02 21:13:54,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:13:54,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-02 21:13:54,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:13:54,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-02 21:13:54,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1428, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 21:13:54,563 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-02 21:13:55,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:13:55,355 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2022-11-02 21:13:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 21:13:55,355 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) Word has length 58 [2022-11-02 21:13:55,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:13:55,356 INFO L225 Difference]: With dead ends: 85 [2022-11-02 21:13:55,357 INFO L226 Difference]: Without dead ends: 76 [2022-11-02 21:13:55,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=272, Invalid=2178, Unknown=0, NotChecked=0, Total=2450 [2022-11-02 21:13:55,358 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 40 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:13:55,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 470 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:13:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-02 21:13:55,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2022-11-02 21:13:55,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 47 states have internal predecessors, (52), 9 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (18), 14 states have call predecessors, (18), 9 states have call successors, (18) [2022-11-02 21:13:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-11-02 21:13:55,365 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 58 [2022-11-02 21:13:55,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:13:55,365 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-11-02 21:13:55,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-02 21:13:55,365 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-11-02 21:13:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-02 21:13:55,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:13:55,367 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:13:55,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-02 21:13:55,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:13:55,571 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:13:55,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:13:55,571 INFO L85 PathProgramCache]: Analyzing trace with hash -551668204, now seen corresponding path program 16 times [2022-11-02 21:13:55,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:13:55,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724347285] [2022-11-02 21:13:55,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:13:55,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:13:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:55,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:13:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:55,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:55,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:13:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:55,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 21:13:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:56,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:13:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:56,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:13:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:56,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:13:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:13:56,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:13:56,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724347285] [2022-11-02 21:13:56,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724347285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:13:56,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572315986] [2022-11-02 21:13:56,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:13:56,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:13:56,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:13:56,213 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:13:56,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-02 21:13:56,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:13:56,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:13:56,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-02 21:13:56,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:13:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 21:13:57,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:13:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 21:13:59,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572315986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:13:59,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:13:59,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 21] total 40 [2022-11-02 21:13:59,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337913924] [2022-11-02 21:13:59,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:13:59,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-02 21:13:59,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:13:59,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-02 21:13:59,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1426, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 21:13:59,181 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-02 21:13:59,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:13:59,971 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2022-11-02 21:13:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 21:13:59,971 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) Word has length 58 [2022-11-02 21:13:59,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:13:59,972 INFO L225 Difference]: With dead ends: 89 [2022-11-02 21:13:59,972 INFO L226 Difference]: Without dead ends: 80 [2022-11-02 21:13:59,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 95 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=274, Invalid=2176, Unknown=0, NotChecked=0, Total=2450 [2022-11-02 21:13:59,973 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 48 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:13:59,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 489 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:13:59,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-02 21:13:59,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2022-11-02 21:13:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.125) internal successors, (54), 49 states have internal predecessors, (54), 9 states have call successors, (9), 4 states have call predecessors, (9), 11 states have return successors, (20), 15 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-02 21:13:59,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2022-11-02 21:13:59,980 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 58 [2022-11-02 21:13:59,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:13:59,980 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2022-11-02 21:13:59,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 2.342857142857143) internal successors, (82), 33 states have internal predecessors, (82), 16 states have call successors, (16), 1 states have call predecessors, (16), 11 states have return successors, (19), 11 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-02 21:13:59,980 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2022-11-02 21:13:59,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 21:13:59,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:13:59,982 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:14:00,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-02 21:14:00,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:14:00,182 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:14:00,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:14:00,183 INFO L85 PathProgramCache]: Analyzing trace with hash 720804832, now seen corresponding path program 7 times [2022-11-02 21:14:00,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:14:00,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979461988] [2022-11-02 21:14:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:14:00,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:14:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:00,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:14:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:00,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:14:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:00,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:14:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:00,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:14:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:00,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 21:14:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:00,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:14:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:00,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:14:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:00,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:14:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-02 21:14:00,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:14:00,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979461988] [2022-11-02 21:14:00,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979461988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:14:00,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129324493] [2022-11-02 21:14:00,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:14:00,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:14:00,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:14:00,795 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:14:00,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-02 21:14:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:01,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-02 21:14:01,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:14:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-02 21:14:01,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:14:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:14:04,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129324493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:14:04,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:14:04,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 23] total 34 [2022-11-02 21:14:04,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101349321] [2022-11-02 21:14:04,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:14:04,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 21:14:04,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:14:04,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 21:14:04,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 21:14:04,169 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-02 21:14:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:14:04,866 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2022-11-02 21:14:04,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 21:14:04,866 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) Word has length 66 [2022-11-02 21:14:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:14:04,867 INFO L225 Difference]: With dead ends: 101 [2022-11-02 21:14:04,867 INFO L226 Difference]: Without dead ends: 97 [2022-11-02 21:14:04,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 116 SyntacticMatches, 13 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=216, Invalid=1764, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 21:14:04,868 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:14:04,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 569 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:14:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-02 21:14:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2022-11-02 21:14:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (29), 19 states have call predecessors, (29), 10 states have call successors, (29) [2022-11-02 21:14:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-11-02 21:14:04,877 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 66 [2022-11-02 21:14:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:14:04,877 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-11-02 21:14:04,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 28 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (20), 10 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-02 21:14:04,878 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-11-02 21:14:04,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 21:14:04,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:14:04,879 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:14:04,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-02 21:14:05,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-02 21:14:05,099 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:14:05,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:14:05,099 INFO L85 PathProgramCache]: Analyzing trace with hash 590358656, now seen corresponding path program 17 times [2022-11-02 21:14:05,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:14:05,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854594375] [2022-11-02 21:14:05,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:14:05,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:14:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:05,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:14:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:05,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:14:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:05,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:14:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:05,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:14:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:05,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 21:14:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:05,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:14:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:05,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:14:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:05,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:14:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 21:14:05,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:14:05,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854594375] [2022-11-02 21:14:05,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854594375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:14:05,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215029707] [2022-11-02 21:14:05,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:14:05,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:14:05,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:14:05,709 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:14:05,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-02 21:14:06,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 21:14:06,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:14:06,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-02 21:14:06,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:14:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 21:14:06,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:14:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:14:08,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215029707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:14:08,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:14:08,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 22] total 42 [2022-11-02 21:14:08,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84600631] [2022-11-02 21:14:08,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:14:08,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-02 21:14:08,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:14:08,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-02 21:14:08,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 21:14:08,979 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 42 states, 37 states have (on average 2.324324324324324) internal successors, (86), 33 states have internal predecessors, (86), 16 states have call successors, (18), 1 states have call predecessors, (18), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2022-11-02 21:14:09,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:14:09,940 INFO L93 Difference]: Finished difference Result 100 states and 125 transitions. [2022-11-02 21:14:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 21:14:09,941 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.324324324324324) internal successors, (86), 33 states have internal predecessors, (86), 16 states have call successors, (18), 1 states have call predecessors, (18), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) Word has length 66 [2022-11-02 21:14:09,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:14:09,942 INFO L225 Difference]: With dead ends: 100 [2022-11-02 21:14:09,942 INFO L226 Difference]: Without dead ends: 91 [2022-11-02 21:14:09,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 110 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=288, Invalid=2468, Unknown=0, NotChecked=0, Total=2756 [2022-11-02 21:14:09,943 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 61 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:14:09,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 546 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:14:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-02 21:14:09,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2022-11-02 21:14:09,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (29), 19 states have call predecessors, (29), 10 states have call successors, (29) [2022-11-02 21:14:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-11-02 21:14:09,952 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 66 [2022-11-02 21:14:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:14:09,952 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-11-02 21:14:09,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.324324324324324) internal successors, (86), 33 states have internal predecessors, (86), 16 states have call successors, (18), 1 states have call predecessors, (18), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2022-11-02 21:14:09,953 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-11-02 21:14:09,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 21:14:09,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:14:09,954 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:14:09,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-02 21:14:10,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:14:10,167 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:14:10,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:14:10,167 INFO L85 PathProgramCache]: Analyzing trace with hash 354934560, now seen corresponding path program 18 times [2022-11-02 21:14:10,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:14:10,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552432568] [2022-11-02 21:14:10,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:14:10,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:14:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:10,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:14:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:10,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:14:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:10,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:14:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:10,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:14:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:10,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 21:14:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:10,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:14:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:10,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:14:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:10,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:14:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 21:14:10,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:14:10,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552432568] [2022-11-02 21:14:10,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552432568] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:14:10,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002633045] [2022-11-02 21:14:10,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:14:10,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:14:10,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:14:10,923 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:14:10,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-02 21:14:11,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-02 21:14:11,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:14:11,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-02 21:14:11,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:14:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 21:14:11,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:14:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 21:14:14,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002633045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:14:14,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:14:14,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 22] total 42 [2022-11-02 21:14:14,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226988032] [2022-11-02 21:14:14,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:14:14,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-02 21:14:14,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:14:14,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-02 21:14:14,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1583, Unknown=0, NotChecked=0, Total=1722 [2022-11-02 21:14:14,509 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 42 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 33 states have internal predecessors, (87), 16 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2022-11-02 21:14:15,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:14:15,475 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2022-11-02 21:14:15,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 21:14:15,475 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 33 states have internal predecessors, (87), 16 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) Word has length 66 [2022-11-02 21:14:15,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:14:15,476 INFO L225 Difference]: With dead ends: 102 [2022-11-02 21:14:15,476 INFO L226 Difference]: Without dead ends: 93 [2022-11-02 21:14:15,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 111 SyntacticMatches, 12 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=290, Invalid=2466, Unknown=0, NotChecked=0, Total=2756 [2022-11-02 21:14:15,478 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 25 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 21:14:15,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 549 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 21:14:15,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-02 21:14:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2022-11-02 21:14:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 10 states have call successors, (10), 4 states have call predecessors, (10), 15 states have return successors, (29), 19 states have call predecessors, (29), 10 states have call successors, (29) [2022-11-02 21:14:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-11-02 21:14:15,486 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 66 [2022-11-02 21:14:15,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:14:15,487 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-11-02 21:14:15,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 33 states have internal predecessors, (87), 16 states have call successors, (19), 1 states have call predecessors, (19), 11 states have return successors, (22), 13 states have call predecessors, (22), 16 states have call successors, (22) [2022-11-02 21:14:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-11-02 21:14:15,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 21:14:15,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:14:15,488 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:14:15,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-02 21:14:15,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-02 21:14:15,703 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:14:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:14:15,703 INFO L85 PathProgramCache]: Analyzing trace with hash 485380736, now seen corresponding path program 19 times [2022-11-02 21:14:15,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:14:15,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046346910] [2022-11-02 21:14:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:14:15,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:14:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:15,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:14:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:15,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:14:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:16,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:14:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:16,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:14:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:16,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 21:14:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:16,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:14:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:16,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:14:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:16,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:14:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 21:14:16,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:14:16,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046346910] [2022-11-02 21:14:16,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046346910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:14:16,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287322406] [2022-11-02 21:14:16,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:14:16,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:14:16,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:14:16,409 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:14:16,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-02 21:14:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:16,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-02 21:14:16,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:14:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-02 21:14:17,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:14:43,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287322406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:14:43,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:14:43,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 34 [2022-11-02 21:14:43,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417395927] [2022-11-02 21:14:43,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 21:14:43,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 21:14:43,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:14:43,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 21:14:43,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2269, Unknown=8, NotChecked=0, Total=2450 [2022-11-02 21:14:43,555 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 34 states, 30 states have (on average 2.033333333333333) internal successors, (61), 26 states have internal predecessors, (61), 10 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-02 21:14:45,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:14:45,068 INFO L93 Difference]: Finished difference Result 139 states and 180 transitions. [2022-11-02 21:14:45,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 21:14:45,069 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 2.033333333333333) internal successors, (61), 26 states have internal predecessors, (61), 10 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) Word has length 66 [2022-11-02 21:14:45,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:14:45,070 INFO L225 Difference]: With dead ends: 139 [2022-11-02 21:14:45,070 INFO L226 Difference]: Without dead ends: 135 [2022-11-02 21:14:45,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=438, Invalid=3976, Unknown=8, NotChecked=0, Total=4422 [2022-11-02 21:14:45,072 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 44 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:14:45,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 645 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 21:14:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-02 21:14:45,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2022-11-02 21:14:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 10 states have call successors, (10), 4 states have call predecessors, (10), 19 states have return successors, (40), 25 states have call predecessors, (40), 10 states have call successors, (40) [2022-11-02 21:14:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2022-11-02 21:14:45,084 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 66 [2022-11-02 21:14:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:14:45,085 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2022-11-02 21:14:45,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 2.033333333333333) internal successors, (61), 26 states have internal predecessors, (61), 10 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-02 21:14:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2022-11-02 21:14:45,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 21:14:45,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:14:45,087 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:14:45,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-02 21:14:45,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-02 21:14:45,307 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:14:45,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:14:45,307 INFO L85 PathProgramCache]: Analyzing trace with hash 959666752, now seen corresponding path program 20 times [2022-11-02 21:14:45,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:14:45,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418920362] [2022-11-02 21:14:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:14:45,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:14:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:45,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:14:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:45,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:14:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:45,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:14:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:45,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 21:14:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:45,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 21:14:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:45,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:14:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:45,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:14:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:45,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:14:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:14:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-02 21:14:45,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:14:45,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418920362] [2022-11-02 21:14:45,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418920362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:14:45,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138915278] [2022-11-02 21:14:45,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:14:45,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:14:45,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:14:45,992 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:14:45,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1960070-cdba-4820-a3d3-684a4c462ea6/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-02 21:14:46,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:14:46,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:14:46,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-02 21:14:46,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:14:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-02 21:14:47,034 INFO L328 TraceCheckSpWp]: Computing backward predicates...