./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/mapavg2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/mapavg2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU --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 6d7fe9c34679d798c6b36a6da45b624905fd34eacba0ad01b9dbff2dd0ff5bf6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:41:17,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:41:17,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:41:17,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:41:17,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:41:17,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:41:17,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:41:17,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:41:17,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:41:17,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:41:17,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:41:17,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:41:17,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:41:17,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:41:17,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:41:17,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:41:17,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:41:17,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:41:17,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:41:17,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:41:17,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:41:17,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:41:17,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:41:17,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:41:17,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:41:17,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:41:17,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:41:17,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:41:17,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:41:17,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:41:17,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:41:17,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:41:17,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:41:17,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:41:17,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:41:17,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:41:17,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:41:17,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:41:17,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:41:17,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:41:17,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:41:17,484 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:41:17,532 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:41:17,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:41:17,533 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:41:17,533 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:41:17,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:41:17,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:41:17,535 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:41:17,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:41:17,535 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:41:17,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:41:17,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:41:17,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:41:17,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:41:17,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:41:17,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:41:17,538 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:41:17,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:41:17,538 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:41:17,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:41:17,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:41:17,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:41:17,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:41:17,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:41:17,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:41:17,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:41:17,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:41:17,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:41:17,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:41:17,541 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:41:17,541 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:41:17,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:41:17,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:41:17,542 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_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d7fe9c34679d798c6b36a6da45b624905fd34eacba0ad01b9dbff2dd0ff5bf6 [2021-11-02 22:41:17,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:41:17,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:41:17,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:41:17,856 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:41:17,857 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:41:17,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-crafted/mapavg2.i [2021-11-02 22:41:17,935 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/data/7f9a60e32/af96486a8cd64889ab3f8eade1085ebc/FLAG6a7285e91 [2021-11-02 22:41:18,443 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:41:18,445 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/sv-benchmarks/c/array-crafted/mapavg2.i [2021-11-02 22:41:18,457 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/data/7f9a60e32/af96486a8cd64889ab3f8eade1085ebc/FLAG6a7285e91 [2021-11-02 22:41:18,786 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/data/7f9a60e32/af96486a8cd64889ab3f8eade1085ebc [2021-11-02 22:41:18,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:41:18,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:41:18,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:41:18,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:41:18,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:41:18,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:41:18" (1/1) ... [2021-11-02 22:41:18,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28fb74c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:18, skipping insertion in model container [2021-11-02 22:41:18,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:41:18" (1/1) ... [2021-11-02 22:41:18,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:41:18,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:41:19,039 WARN L228 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_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/sv-benchmarks/c/array-crafted/mapavg2.i[1313,1326] [2021-11-02 22:41:19,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:41:19,050 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:41:19,075 WARN L228 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_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/sv-benchmarks/c/array-crafted/mapavg2.i[1313,1326] [2021-11-02 22:41:19,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:41:19,107 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:41:19,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:19 WrapperNode [2021-11-02 22:41:19,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:41:19,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:41:19,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:41:19,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:41:19,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:19" (1/1) ... [2021-11-02 22:41:19,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:19" (1/1) ... [2021-11-02 22:41:19,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:41:19,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:41:19,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:41:19,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:41:19,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:19" (1/1) ... [2021-11-02 22:41:19,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:19" (1/1) ... [2021-11-02 22:41:19,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:19" (1/1) ... [2021-11-02 22:41:19,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:19" (1/1) ... [2021-11-02 22:41:19,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:19" (1/1) ... [2021-11-02 22:41:19,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:19" (1/1) ... [2021-11-02 22:41:19,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:19" (1/1) ... [2021-11-02 22:41:19,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:41:19,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:41:19,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:41:19,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:41:19,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:19" (1/1) ... [2021-11-02 22:41:19,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:41:19,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:19,277 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:41:19,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:41:19,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:41:19,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:41:19,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:41:19,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:41:19,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:41:19,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:41:19,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:41:19,677 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:41:19,678 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-02 22:41:19,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:41:19 BoogieIcfgContainer [2021-11-02 22:41:19,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:41:19,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:41:19,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:41:19,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:41:19,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:41:18" (1/3) ... [2021-11-02 22:41:19,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2fc169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:41:19, skipping insertion in model container [2021-11-02 22:41:19,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:41:19" (2/3) ... [2021-11-02 22:41:19,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d2fc169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:41:19, skipping insertion in model container [2021-11-02 22:41:19,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:41:19" (3/3) ... [2021-11-02 22:41:19,688 INFO L111 eAbstractionObserver]: Analyzing ICFG mapavg2.i [2021-11-02 22:41:19,694 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:41:19,694 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:41:19,741 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:41:19,747 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:41:19,747 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:41:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:19,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:41:19,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:19,767 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:19,768 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:19,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:19,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2021-11-02 22:41:19,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:19,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738196305] [2021-11-02 22:41:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:19,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:41:19,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:19,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738196305] [2021-11-02 22:41:19,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738196305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:19,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:19,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:41:19,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488904543] [2021-11-02 22:41:19,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:41:19,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:20,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:41:20,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:20,019 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:20,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:20,068 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-11-02 22:41:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:41:20,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-02 22:41:20,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:20,078 INFO L225 Difference]: With dead ends: 52 [2021-11-02 22:41:20,079 INFO L226 Difference]: Without dead ends: 25 [2021-11-02 22:41:20,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-02 22:41:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-02 22:41:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:20,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-02 22:41:20,119 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2021-11-02 22:41:20,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:20,120 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-02 22:41:20,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:20,122 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-02 22:41:20,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:41:20,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:20,124 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:20,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:41:20,126 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:20,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:20,129 INFO L85 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2021-11-02 22:41:20,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:20,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795965527] [2021-11-02 22:41:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:20,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:41:20,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:20,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795965527] [2021-11-02 22:41:20,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795965527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:20,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330180166] [2021-11-02 22:41:20,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:20,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:20,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:20,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:20,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:41:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:20,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:41:20,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:41:20,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330180166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:20,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:41:20,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-02 22:41:20,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293649931] [2021-11-02 22:41:20,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:41:20,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:20,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:41:20,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:41:20,403 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:20,443 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-11-02 22:41:20,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:41:20,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-02 22:41:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:20,445 INFO L225 Difference]: With dead ends: 46 [2021-11-02 22:41:20,445 INFO L226 Difference]: Without dead ends: 30 [2021-11-02 22:41:20,446 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:41:20,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-02 22:41:20,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-11-02 22:41:20,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:20,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-02 22:41:20,465 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-11-02 22:41:20,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:20,465 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-02 22:41:20,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:20,466 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-02 22:41:20,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 22:41:20,467 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:20,467 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:20,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:20,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:20,684 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:20,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2021-11-02 22:41:20,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:20,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840306610] [2021-11-02 22:41:20,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:20,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:41:20,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:20,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840306610] [2021-11-02 22:41:20,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840306610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:20,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666716553] [2021-11-02 22:41:20,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:20,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:20,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:20,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:20,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:41:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:20,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:41:20,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:20,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666716553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:20,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:41:20,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-02 22:41:20,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671405213] [2021-11-02 22:41:20,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:41:20,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:20,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:41:20,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:41:20,963 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:20,975 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-11-02 22:41:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:41:20,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 22:41:20,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:20,977 INFO L225 Difference]: With dead ends: 38 [2021-11-02 22:41:20,977 INFO L226 Difference]: Without dead ends: 29 [2021-11-02 22:41:20,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:41:20,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-02 22:41:20,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-02 22:41:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-02 22:41:20,983 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-11-02 22:41:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:20,984 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-02 22:41:20,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-02 22:41:20,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 22:41:20,986 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:20,986 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:21,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:21,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:21,200 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:21,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:21,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2021-11-02 22:41:21,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:21,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111321433] [2021-11-02 22:41:21,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:21,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:21,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:21,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111321433] [2021-11-02 22:41:21,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111321433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:21,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14847657] [2021-11-02 22:41:21,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:21,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:21,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:21,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:21,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:41:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:21,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:41:21,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:21,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14847657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:21,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:21,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 22:41:21,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765697084] [2021-11-02 22:41:21,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:41:21,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:21,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:41:21,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:41:21,455 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:21,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:21,486 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-11-02 22:41:21,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:41:21,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-02 22:41:21,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:21,488 INFO L225 Difference]: With dead ends: 54 [2021-11-02 22:41:21,488 INFO L226 Difference]: Without dead ends: 31 [2021-11-02 22:41:21,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:41:21,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-02 22:41:21,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-11-02 22:41:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:21,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-02 22:41:21,494 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2021-11-02 22:41:21,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:21,494 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-02 22:41:21,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:21,495 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-02 22:41:21,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 22:41:21,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:21,496 INFO L513 BasicCegarLoop]: 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, 1, 1] [2021-11-02 22:41:21,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:21,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:21,721 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:21,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:21,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2021-11-02 22:41:21,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:21,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291978478] [2021-11-02 22:41:21,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:21,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:41:21,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:21,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291978478] [2021-11-02 22:41:21,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291978478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:21,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233576770] [2021-11-02 22:41:21,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:41:21,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:21,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:21,820 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:21,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:41:21,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:41:21,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:21,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:41:21,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:41:22,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233576770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:22,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:22,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-02 22:41:22,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858448581] [2021-11-02 22:41:22,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:41:22,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:41:22,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:41:22,015 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:22,092 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-11-02 22:41:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:41:22,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-02 22:41:22,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:22,093 INFO L225 Difference]: With dead ends: 61 [2021-11-02 22:41:22,094 INFO L226 Difference]: Without dead ends: 42 [2021-11-02 22:41:22,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:41:22,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-02 22:41:22,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-11-02 22:41:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-02 22:41:22,100 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-11-02 22:41:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:22,101 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-02 22:41:22,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-02 22:41:22,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:41:22,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:22,102 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:22,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:22,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:22,327 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:22,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:22,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1059243608, now seen corresponding path program 3 times [2021-11-02 22:41:22,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:22,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190967137] [2021-11-02 22:41:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:22,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 22:41:22,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:22,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190967137] [2021-11-02 22:41:22,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190967137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:22,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653468445] [2021-11-02 22:41:22,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:41:22,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:22,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:22,428 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:22,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:41:22,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:41:22,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:22,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:41:22,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 22:41:22,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653468445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:22,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:22,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-02 22:41:22,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734867888] [2021-11-02 22:41:22,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:41:22,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:22,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:41:22,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:41:22,773 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:22,840 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-11-02 22:41:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:41:22,841 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-02 22:41:22,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:22,844 INFO L225 Difference]: With dead ends: 81 [2021-11-02 22:41:22,845 INFO L226 Difference]: Without dead ends: 50 [2021-11-02 22:41:22,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:41:22,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-02 22:41:22,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-11-02 22:41:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:22,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-11-02 22:41:22,870 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2021-11-02 22:41:22,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:22,871 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-11-02 22:41:22,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:22,871 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-11-02 22:41:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 22:41:22,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:22,874 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:22,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:23,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-02 22:41:23,084 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:23,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1892525292, now seen corresponding path program 4 times [2021-11-02 22:41:23,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:23,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688588897] [2021-11-02 22:41:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:23,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-02 22:41:23,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:23,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688588897] [2021-11-02 22:41:23,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688588897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:23,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330816850] [2021-11-02 22:41:23,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:41:23,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:23,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:23,181 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:23,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:41:23,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:41:23,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:23,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:41:23,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-02 22:41:23,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330816850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:23,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:23,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-02 22:41:23,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196426869] [2021-11-02 22:41:23,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:41:23,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:23,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:41:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:41:23,434 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:23,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:23,452 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-11-02 22:41:23,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:41:23,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-02 22:41:23,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:23,453 INFO L225 Difference]: With dead ends: 86 [2021-11-02 22:41:23,453 INFO L226 Difference]: Without dead ends: 49 [2021-11-02 22:41:23,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:41:23,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-02 22:41:23,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-11-02 22:41:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-11-02 22:41:23,459 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2021-11-02 22:41:23,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:23,459 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-11-02 22:41:23,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:23,460 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-11-02 22:41:23,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 22:41:23,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:23,461 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:23,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:23,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:23,679 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:23,680 INFO L85 PathProgramCache]: Analyzing trace with hash 704135506, now seen corresponding path program 5 times [2021-11-02 22:41:23,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:23,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691065199] [2021-11-02 22:41:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:23,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-02 22:41:23,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:23,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691065199] [2021-11-02 22:41:23,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691065199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:23,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577761102] [2021-11-02 22:41:23,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:41:23,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:23,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:23,816 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:23,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:41:23,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-02 22:41:23,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:23,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:41:23,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-02 22:41:24,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577761102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:24,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:24,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-02 22:41:24,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773545450] [2021-11-02 22:41:24,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:41:24,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:24,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:41:24,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:41:24,084 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:24,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:24,193 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2021-11-02 22:41:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:41:24,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-02 22:41:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:24,195 INFO L225 Difference]: With dead ends: 97 [2021-11-02 22:41:24,195 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 22:41:24,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:41:24,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 22:41:24,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-11-02 22:41:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:24,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-11-02 22:41:24,207 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2021-11-02 22:41:24,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:24,207 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-11-02 22:41:24,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-11-02 22:41:24,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 22:41:24,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:24,209 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:24,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:24,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:24,416 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:24,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:24,416 INFO L85 PathProgramCache]: Analyzing trace with hash -788382450, now seen corresponding path program 6 times [2021-11-02 22:41:24,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:24,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733611661] [2021-11-02 22:41:24,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:24,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-02 22:41:24,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:24,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733611661] [2021-11-02 22:41:24,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733611661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:24,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113485158] [2021-11-02 22:41:24,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:41:24,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:24,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:24,532 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:24,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:41:24,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 22:41:24,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:24,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:41:24,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-02 22:41:25,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113485158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:25,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:25,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-11-02 22:41:25,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436269322] [2021-11-02 22:41:25,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:41:25,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:25,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:41:25,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:41:25,008 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:25,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:25,064 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-11-02 22:41:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:41:25,065 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-02 22:41:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:25,069 INFO L225 Difference]: With dead ends: 105 [2021-11-02 22:41:25,070 INFO L226 Difference]: Without dead ends: 62 [2021-11-02 22:41:25,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:41:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-02 22:41:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-11-02 22:41:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-11-02 22:41:25,082 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 55 [2021-11-02 22:41:25,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:25,082 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-11-02 22:41:25,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-11-02 22:41:25,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 22:41:25,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:25,084 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:25,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:25,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-02 22:41:25,288 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:25,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1118484150, now seen corresponding path program 7 times [2021-11-02 22:41:25,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:25,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500214492] [2021-11-02 22:41:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:25,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-02 22:41:25,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:25,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500214492] [2021-11-02 22:41:25,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500214492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:25,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637651570] [2021-11-02 22:41:25,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:41:25,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:25,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:25,386 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:25,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:41:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:25,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:41:25,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-02 22:41:25,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637651570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:25,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:25,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-02 22:41:25,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875755187] [2021-11-02 22:41:25,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:41:25,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:25,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:41:25,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:41:25,707 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:25,735 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-11-02 22:41:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:41:25,736 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-02 22:41:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:25,737 INFO L225 Difference]: With dead ends: 108 [2021-11-02 22:41:25,737 INFO L226 Difference]: Without dead ends: 63 [2021-11-02 22:41:25,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:41:25,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-02 22:41:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-11-02 22:41:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-11-02 22:41:25,743 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2021-11-02 22:41:25,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:25,743 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-11-02 22:41:25,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:25,744 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-11-02 22:41:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 22:41:25,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:25,745 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:25,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:25,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:41:25,971 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:25,971 INFO L85 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 8 times [2021-11-02 22:41:25,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:25,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727442950] [2021-11-02 22:41:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:25,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-02 22:41:26,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:26,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727442950] [2021-11-02 22:41:26,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727442950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:26,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612262209] [2021-11-02 22:41:26,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:41:26,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:26,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:26,112 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:26,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:41:26,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:41:26,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:26,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:41:26,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-02 22:41:26,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612262209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:26,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:26,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-02 22:41:26,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086706971] [2021-11-02 22:41:26,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:41:26,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:26,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:41:26,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:41:26,420 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:26,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:26,445 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2021-11-02 22:41:26,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:41:26,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-02 22:41:26,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:26,447 INFO L225 Difference]: With dead ends: 110 [2021-11-02 22:41:26,447 INFO L226 Difference]: Without dead ends: 65 [2021-11-02 22:41:26,447 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:41:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-02 22:41:26,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-11-02 22:41:26,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:26,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-11-02 22:41:26,454 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2021-11-02 22:41:26,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:26,456 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-11-02 22:41:26,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-11-02 22:41:26,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:41:26,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:26,459 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:26,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:26,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 22:41:26,673 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:26,673 INFO L85 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 9 times [2021-11-02 22:41:26,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:26,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817496856] [2021-11-02 22:41:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:26,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-02 22:41:26,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:26,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817496856] [2021-11-02 22:41:26,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817496856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:26,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245958952] [2021-11-02 22:41:26,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:41:26,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:26,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:26,803 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:26,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:41:27,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 22:41:27,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:27,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:41:27,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-02 22:41:27,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245958952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:27,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:27,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-11-02 22:41:27,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040020872] [2021-11-02 22:41:27,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:41:27,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:27,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:41:27,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:41:27,277 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:27,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:27,332 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-11-02 22:41:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:41:27,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-02 22:41:27,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:27,334 INFO L225 Difference]: With dead ends: 115 [2021-11-02 22:41:27,334 INFO L226 Difference]: Without dead ends: 70 [2021-11-02 22:41:27,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:41:27,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-02 22:41:27,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-11-02 22:41:27,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-11-02 22:41:27,354 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 63 [2021-11-02 22:41:27,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:27,355 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-11-02 22:41:27,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:27,355 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-11-02 22:41:27,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:41:27,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:27,362 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:27,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:27,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 22:41:27,587 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:27,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:27,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1743137406, now seen corresponding path program 10 times [2021-11-02 22:41:27,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:27,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085615834] [2021-11-02 22:41:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:27,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-02 22:41:27,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:27,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085615834] [2021-11-02 22:41:27,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085615834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:27,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641356329] [2021-11-02 22:41:27,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:41:27,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:27,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:27,719 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:27,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:41:27,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:41:27,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:27,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:41:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-02 22:41:28,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641356329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:28,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:28,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-02 22:41:28,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349150069] [2021-11-02 22:41:28,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:41:28,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:28,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:41:28,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:41:28,083 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:28,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:28,118 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2021-11-02 22:41:28,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:41:28,119 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 22:41:28,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:28,120 INFO L225 Difference]: With dead ends: 118 [2021-11-02 22:41:28,120 INFO L226 Difference]: Without dead ends: 71 [2021-11-02 22:41:28,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:41:28,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-02 22:41:28,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-11-02 22:41:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-11-02 22:41:28,125 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2021-11-02 22:41:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:28,125 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-11-02 22:41:28,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-11-02 22:41:28,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:41:28,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:28,127 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:28,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:28,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:28,348 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:28,349 INFO L85 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 11 times [2021-11-02 22:41:28,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:28,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520685313] [2021-11-02 22:41:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:28,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-02 22:41:28,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:28,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520685313] [2021-11-02 22:41:28,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520685313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:28,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085035631] [2021-11-02 22:41:28,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:41:28,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:28,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:28,477 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:28,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:41:28,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-02 22:41:28,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:28,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:41:28,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-02 22:41:29,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085035631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:29,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:29,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-02 22:41:29,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637261237] [2021-11-02 22:41:29,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:41:29,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:29,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:41:29,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:41:29,113 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:29,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:29,149 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2021-11-02 22:41:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:41:29,150 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-02 22:41:29,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:29,151 INFO L225 Difference]: With dead ends: 120 [2021-11-02 22:41:29,151 INFO L226 Difference]: Without dead ends: 73 [2021-11-02 22:41:29,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:41:29,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-02 22:41:29,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-11-02 22:41:29,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-11-02 22:41:29,160 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2021-11-02 22:41:29,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:29,161 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-11-02 22:41:29,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:29,161 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-11-02 22:41:29,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 22:41:29,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:29,162 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:29,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:29,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:29,375 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:29,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:29,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 12 times [2021-11-02 22:41:29,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:29,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927189381] [2021-11-02 22:41:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:29,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-02 22:41:29,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:29,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927189381] [2021-11-02 22:41:29,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927189381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:29,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168304804] [2021-11-02 22:41:29,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:41:29,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:29,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:29,508 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:29,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:41:30,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-02 22:41:30,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:30,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:41:30,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-02 22:41:30,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168304804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:30,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:30,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2021-11-02 22:41:30,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9331564] [2021-11-02 22:41:30,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:41:30,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:30,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:41:30,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:41:30,425 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:30,485 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2021-11-02 22:41:30,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:41:30,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-02 22:41:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:30,487 INFO L225 Difference]: With dead ends: 125 [2021-11-02 22:41:30,487 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 22:41:30,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:41:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 22:41:30,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2021-11-02 22:41:30,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:30,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-11-02 22:41:30,491 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 71 [2021-11-02 22:41:30,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:30,499 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-11-02 22:41:30,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:30,500 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-11-02 22:41:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 22:41:30,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:30,501 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:30,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:30,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:41:30,727 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:30,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:30,728 INFO L85 PathProgramCache]: Analyzing trace with hash 970283450, now seen corresponding path program 13 times [2021-11-02 22:41:30,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:30,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834094360] [2021-11-02 22:41:30,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:30,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-02 22:41:30,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:30,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834094360] [2021-11-02 22:41:30,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834094360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:30,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786460528] [2021-11-02 22:41:30,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:41:30,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:30,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:30,876 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:30,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:41:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:31,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:41:31,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-02 22:41:31,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786460528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:31,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:31,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 22:41:31,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926964612] [2021-11-02 22:41:31,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:41:31,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:31,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:41:31,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:41:31,303 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:31,356 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-11-02 22:41:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:41:31,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-02 22:41:31,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:31,358 INFO L225 Difference]: With dead ends: 128 [2021-11-02 22:41:31,358 INFO L226 Difference]: Without dead ends: 79 [2021-11-02 22:41:31,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:41:31,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-02 22:41:31,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-11-02 22:41:31,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-11-02 22:41:31,365 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2021-11-02 22:41:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:31,366 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-11-02 22:41:31,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-11-02 22:41:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 22:41:31,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:31,367 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:31,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:31,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:41:31,582 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:31,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1574617224, now seen corresponding path program 14 times [2021-11-02 22:41:31,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:31,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265208523] [2021-11-02 22:41:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:31,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-02 22:41:31,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:31,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265208523] [2021-11-02 22:41:31,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265208523] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:31,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276548872] [2021-11-02 22:41:31,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:41:31,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:31,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:31,755 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:31,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:41:32,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:41:32,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:32,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:41:32,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-02 22:41:32,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276548872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:32,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:32,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 22:41:32,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732004656] [2021-11-02 22:41:32,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:41:32,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:32,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:41:32,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:41:32,241 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:32,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:32,279 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2021-11-02 22:41:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:41:32,279 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-02 22:41:32,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:32,281 INFO L225 Difference]: With dead ends: 130 [2021-11-02 22:41:32,281 INFO L226 Difference]: Without dead ends: 81 [2021-11-02 22:41:32,282 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:41:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-02 22:41:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-11-02 22:41:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-11-02 22:41:32,287 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2021-11-02 22:41:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:32,288 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-11-02 22:41:32,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:32,289 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-11-02 22:41:32,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 22:41:32,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:32,290 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:32,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:32,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:41:32,503 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:32,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:32,504 INFO L85 PathProgramCache]: Analyzing trace with hash 907193782, now seen corresponding path program 15 times [2021-11-02 22:41:32,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:32,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612066707] [2021-11-02 22:41:32,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:32,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-02 22:41:32,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:32,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612066707] [2021-11-02 22:41:32,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612066707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:32,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392578156] [2021-11-02 22:41:32,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:41:32,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:32,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:32,667 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:32,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:41:33,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 22:41:33,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:33,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:41:33,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-02 22:41:33,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392578156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:33,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:33,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2021-11-02 22:41:33,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234920927] [2021-11-02 22:41:33,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:41:33,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:33,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:41:33,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:41:33,463 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:33,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:33,590 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2021-11-02 22:41:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:41:33,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-02 22:41:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:33,591 INFO L225 Difference]: With dead ends: 141 [2021-11-02 22:41:33,592 INFO L226 Difference]: Without dead ends: 92 [2021-11-02 22:41:33,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:41:33,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-02 22:41:33,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2021-11-02 22:41:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-11-02 22:41:33,597 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2021-11-02 22:41:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:33,598 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-11-02 22:41:33,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-11-02 22:41:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-02 22:41:33,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:33,599 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:33,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:33,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:41:33,815 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:33,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:33,816 INFO L85 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 16 times [2021-11-02 22:41:33,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:33,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193322152] [2021-11-02 22:41:33,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:33,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-02 22:41:34,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:34,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193322152] [2021-11-02 22:41:34,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193322152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:34,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200258048] [2021-11-02 22:41:34,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:41:34,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:34,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:34,024 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:34,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:41:34,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:41:34,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:34,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:41:34,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-02 22:41:34,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200258048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:34,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:34,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 22:41:34,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101198961] [2021-11-02 22:41:34,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:41:34,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:34,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:41:34,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:41:34,631 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:34,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:34,682 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2021-11-02 22:41:34,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:41:34,682 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-02 22:41:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:34,683 INFO L225 Difference]: With dead ends: 146 [2021-11-02 22:41:34,683 INFO L226 Difference]: Without dead ends: 91 [2021-11-02 22:41:34,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:41:34,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-02 22:41:34,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-11-02 22:41:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-11-02 22:41:34,689 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2021-11-02 22:41:34,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:34,689 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-11-02 22:41:34,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:34,689 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-11-02 22:41:34,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 22:41:34,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:34,691 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:34,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:34,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:34,915 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:34,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:34,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2002949072, now seen corresponding path program 17 times [2021-11-02 22:41:34,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:34,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936828913] [2021-11-02 22:41:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:34,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-02 22:41:35,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:35,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936828913] [2021-11-02 22:41:35,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936828913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:35,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294390727] [2021-11-02 22:41:35,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:41:35,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:35,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:35,148 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:35,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:41:36,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-02 22:41:36,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:36,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 22:41:36,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-02 22:41:36,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294390727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:36,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:36,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 22:41:36,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164266143] [2021-11-02 22:41:36,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:41:36,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:36,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:41:36,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:41:36,238 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:36,287 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2021-11-02 22:41:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:41:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-02 22:41:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:36,289 INFO L225 Difference]: With dead ends: 148 [2021-11-02 22:41:36,289 INFO L226 Difference]: Without dead ends: 93 [2021-11-02 22:41:36,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:41:36,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-02 22:41:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-11-02 22:41:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-11-02 22:41:36,294 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2021-11-02 22:41:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:36,295 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-11-02 22:41:36,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:36,295 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-11-02 22:41:36,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-02 22:41:36,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:36,296 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:36,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:36,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:36,507 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:36,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:36,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1315869330, now seen corresponding path program 18 times [2021-11-02 22:41:36,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:36,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926277014] [2021-11-02 22:41:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:36,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-02 22:41:36,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:36,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926277014] [2021-11-02 22:41:36,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926277014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:36,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755543895] [2021-11-02 22:41:36,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:41:36,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:36,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:36,712 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:36,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:41:37,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-02 22:41:37,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:37,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:41:37,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-02 22:41:37,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755543895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:37,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:37,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2021-11-02 22:41:37,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354955616] [2021-11-02 22:41:37,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 22:41:37,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:37,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 22:41:37,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:41:37,795 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:37,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:37,925 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-11-02 22:41:37,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 22:41:37,925 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-02 22:41:37,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:37,926 INFO L225 Difference]: With dead ends: 159 [2021-11-02 22:41:37,926 INFO L226 Difference]: Without dead ends: 104 [2021-11-02 22:41:37,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:41:37,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-02 22:41:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-11-02 22:41:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-11-02 22:41:37,932 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2021-11-02 22:41:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:37,932 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-11-02 22:41:37,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-11-02 22:41:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-02 22:41:37,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:37,934 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:37,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:38,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-02 22:41:38,155 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:38,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:38,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1310358570, now seen corresponding path program 19 times [2021-11-02 22:41:38,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:38,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624100494] [2021-11-02 22:41:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:38,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-02 22:41:38,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:38,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624100494] [2021-11-02 22:41:38,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624100494] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:38,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806895469] [2021-11-02 22:41:38,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:41:38,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:38,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:38,397 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:38,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 22:41:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:38,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:41:38,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-02 22:41:39,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806895469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:39,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:39,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 22:41:39,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806228107] [2021-11-02 22:41:39,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:41:39,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:39,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:41:39,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:41:39,006 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:39,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:39,086 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2021-11-02 22:41:39,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:41:39,088 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-02 22:41:39,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:39,089 INFO L225 Difference]: With dead ends: 164 [2021-11-02 22:41:39,089 INFO L226 Difference]: Without dead ends: 103 [2021-11-02 22:41:39,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:41:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-02 22:41:39,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-11-02 22:41:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:39,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-11-02 22:41:39,095 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2021-11-02 22:41:39,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:39,095 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-11-02 22:41:39,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:39,096 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-11-02 22:41:39,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-02 22:41:39,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:39,097 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:39,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:39,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:39,311 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:39,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:39,312 INFO L85 PathProgramCache]: Analyzing trace with hash -903575576, now seen corresponding path program 20 times [2021-11-02 22:41:39,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:39,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561720621] [2021-11-02 22:41:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:39,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-02 22:41:39,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:39,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561720621] [2021-11-02 22:41:39,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561720621] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:39,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759463330] [2021-11-02 22:41:39,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:41:39,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:39,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:39,536 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:39,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 22:41:39,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:41:39,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:39,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:41:39,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-02 22:41:40,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759463330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:40,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:40,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 22:41:40,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397565531] [2021-11-02 22:41:40,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:41:40,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:40,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:41:40,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:41:40,159 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:40,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:40,224 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2021-11-02 22:41:40,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:41:40,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-02 22:41:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:40,229 INFO L225 Difference]: With dead ends: 166 [2021-11-02 22:41:40,229 INFO L226 Difference]: Without dead ends: 105 [2021-11-02 22:41:40,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:41:40,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-02 22:41:40,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-11-02 22:41:40,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-11-02 22:41:40,234 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2021-11-02 22:41:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:40,235 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-11-02 22:41:40,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:40,235 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-11-02 22:41:40,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-02 22:41:40,236 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:40,237 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:40,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:40,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:40,451 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:40,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1809488934, now seen corresponding path program 21 times [2021-11-02 22:41:40,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:40,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242528748] [2021-11-02 22:41:40,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:40,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-02 22:41:40,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:40,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242528748] [2021-11-02 22:41:40,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242528748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:40,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361383255] [2021-11-02 22:41:40,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:41:40,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:40,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:40,732 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:40,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 22:41:41,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 22:41:41,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:41,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:41:41,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-11-02 22:41:41,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361383255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:41,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:41,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2021-11-02 22:41:41,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244576611] [2021-11-02 22:41:41,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 22:41:41,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:41,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 22:41:41,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:41:41,720 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:41,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:41,801 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2021-11-02 22:41:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:41:41,801 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-02 22:41:41,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:41,802 INFO L225 Difference]: With dead ends: 171 [2021-11-02 22:41:41,802 INFO L226 Difference]: Without dead ends: 110 [2021-11-02 22:41:41,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:41:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-02 22:41:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-11-02 22:41:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 107 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-11-02 22:41:41,807 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 103 [2021-11-02 22:41:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:41,808 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-11-02 22:41:41,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-11-02 22:41:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-02 22:41:41,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:41,810 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:41,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:42,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 22:41:42,010 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:42,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:42,011 INFO L85 PathProgramCache]: Analyzing trace with hash 676687458, now seen corresponding path program 22 times [2021-11-02 22:41:42,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:42,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685535617] [2021-11-02 22:41:42,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:42,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-02 22:41:42,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:42,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685535617] [2021-11-02 22:41:42,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685535617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:42,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948328723] [2021-11-02 22:41:42,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:41:42,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:42,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:42,335 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:42,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 22:41:42,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:41:42,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:42,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:41:42,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-02 22:41:43,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948328723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:43,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:43,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 22:41:43,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594502434] [2021-11-02 22:41:43,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:41:43,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:43,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:41:43,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:41:43,028 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:43,086 INFO L93 Difference]: Finished difference Result 174 states and 182 transitions. [2021-11-02 22:41:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:41:43,087 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-02 22:41:43,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:43,089 INFO L225 Difference]: With dead ends: 174 [2021-11-02 22:41:43,089 INFO L226 Difference]: Without dead ends: 111 [2021-11-02 22:41:43,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:41:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-02 22:41:43,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-11-02 22:41:43,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:43,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-11-02 22:41:43,102 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2021-11-02 22:41:43,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:43,102 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-11-02 22:41:43,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:43,103 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-11-02 22:41:43,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-02 22:41:43,104 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:43,105 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:43,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:43,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 22:41:43,324 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:43,325 INFO L85 PathProgramCache]: Analyzing trace with hash -168895456, now seen corresponding path program 23 times [2021-11-02 22:41:43,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:43,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081488629] [2021-11-02 22:41:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:43,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-02 22:41:43,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:43,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081488629] [2021-11-02 22:41:43,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081488629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:43,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846066197] [2021-11-02 22:41:43,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:41:43,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:43,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:43,646 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:43,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 22:41:45,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-02 22:41:45,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:45,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:41:45,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2021-11-02 22:41:46,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846066197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:46,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:46,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2021-11-02 22:41:46,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298196837] [2021-11-02 22:41:46,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:41:46,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:46,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:41:46,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:41:46,252 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:46,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:46,411 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2021-11-02 22:41:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 22:41:46,412 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-02 22:41:46,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:46,412 INFO L225 Difference]: With dead ends: 185 [2021-11-02 22:41:46,412 INFO L226 Difference]: Without dead ends: 122 [2021-11-02 22:41:46,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:41:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-02 22:41:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2021-11-02 22:41:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 117 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2021-11-02 22:41:46,418 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 109 [2021-11-02 22:41:46,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:46,418 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2021-11-02 22:41:46,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:46,418 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2021-11-02 22:41:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-02 22:41:46,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:46,420 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:46,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:46,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 22:41:46,633 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:46,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:46,633 INFO L85 PathProgramCache]: Analyzing trace with hash -375494436, now seen corresponding path program 24 times [2021-11-02 22:41:46,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:46,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293182211] [2021-11-02 22:41:46,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:46,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-02 22:41:46,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:46,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293182211] [2021-11-02 22:41:46,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293182211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:46,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48700807] [2021-11-02 22:41:46,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:41:46,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:46,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:46,983 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:47,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 22:41:48,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 22:41:48,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:48,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:41:48,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-11-02 22:41:48,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48700807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:48,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:48,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2021-11-02 22:41:48,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131785179] [2021-11-02 22:41:48,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 22:41:48,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:48,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 22:41:48,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:41:48,770 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:48,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:48,862 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2021-11-02 22:41:48,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 22:41:48,863 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-02 22:41:48,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:48,864 INFO L225 Difference]: With dead ends: 193 [2021-11-02 22:41:48,864 INFO L226 Difference]: Without dead ends: 124 [2021-11-02 22:41:48,865 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:41:48,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-02 22:41:48,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2021-11-02 22:41:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 121 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-11-02 22:41:48,870 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 117 [2021-11-02 22:41:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:48,871 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-11-02 22:41:48,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:48,871 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-11-02 22:41:48,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-02 22:41:48,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:48,872 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:48,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 22:41:49,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:41:49,083 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:49,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:49,084 INFO L85 PathProgramCache]: Analyzing trace with hash 26792216, now seen corresponding path program 25 times [2021-11-02 22:41:49,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:49,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878437246] [2021-11-02 22:41:49,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:49,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-02 22:41:49,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:49,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878437246] [2021-11-02 22:41:49,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878437246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:49,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256642041] [2021-11-02 22:41:49,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:41:49,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:49,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:49,435 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:49,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 22:41:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:50,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 22:41:50,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-02 22:41:50,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256642041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:50,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:50,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-02 22:41:50,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860816433] [2021-11-02 22:41:50,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 22:41:50,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:50,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 22:41:50,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:41:50,388 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 28 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:50,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:50,441 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2021-11-02 22:41:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 22:41:50,452 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 28 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-02 22:41:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:50,453 INFO L225 Difference]: With dead ends: 196 [2021-11-02 22:41:50,453 INFO L226 Difference]: Without dead ends: 125 [2021-11-02 22:41:50,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:41:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-02 22:41:50,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-11-02 22:41:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:50,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2021-11-02 22:41:50,458 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2021-11-02 22:41:50,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:50,459 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2021-11-02 22:41:50,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 28 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:50,459 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2021-11-02 22:41:50,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 22:41:50,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:50,460 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:50,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-02 22:41:50,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 22:41:50,667 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:50,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:50,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1400350122, now seen corresponding path program 26 times [2021-11-02 22:41:50,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:50,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632968100] [2021-11-02 22:41:50,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:50,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-02 22:41:51,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:51,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632968100] [2021-11-02 22:41:51,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632968100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:51,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874118328] [2021-11-02 22:41:51,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:41:51,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:51,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:51,021 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:51,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 22:41:51,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:41:51,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:51,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 22:41:51,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-02 22:41:51,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874118328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:51,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:51,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-02 22:41:51,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265426658] [2021-11-02 22:41:51,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 22:41:51,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:51,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 22:41:51,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:41:51,870 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:51,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:51,955 INFO L93 Difference]: Finished difference Result 198 states and 206 transitions. [2021-11-02 22:41:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:41:51,959 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-02 22:41:51,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:51,960 INFO L225 Difference]: With dead ends: 198 [2021-11-02 22:41:51,961 INFO L226 Difference]: Without dead ends: 127 [2021-11-02 22:41:51,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:41:51,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-02 22:41:51,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2021-11-02 22:41:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-11-02 22:41:51,966 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2021-11-02 22:41:51,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:51,966 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-11-02 22:41:51,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-11-02 22:41:51,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-02 22:41:51,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:51,972 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:51,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-02 22:41:52,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:52,183 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:52,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1505397780, now seen corresponding path program 27 times [2021-11-02 22:41:52,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:52,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115980210] [2021-11-02 22:41:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:52,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-02 22:41:52,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:52,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115980210] [2021-11-02 22:41:52,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115980210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:52,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637406167] [2021-11-02 22:41:52,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:41:52,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:52,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:52,597 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:52,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 22:41:53,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 22:41:53,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:53,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:41:53,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 51 proven. 49 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2021-11-02 22:41:54,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637406167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:54,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:54,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 12] total 39 [2021-11-02 22:41:54,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355131079] [2021-11-02 22:41:54,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 22:41:54,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:54,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 22:41:54,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=973, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:41:54,430 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:54,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:54,753 INFO L93 Difference]: Finished difference Result 210 states and 222 transitions. [2021-11-02 22:41:54,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 22:41:54,753 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-02 22:41:54,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:54,754 INFO L225 Difference]: With dead ends: 210 [2021-11-02 22:41:54,755 INFO L226 Difference]: Without dead ends: 139 [2021-11-02 22:41:54,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 22:41:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-02 22:41:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2021-11-02 22:41:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.037037037037037) internal successors, (140), 135 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:54,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2021-11-02 22:41:54,762 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 125 [2021-11-02 22:41:54,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:54,762 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2021-11-02 22:41:54,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:54,762 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2021-11-02 22:41:54,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-02 22:41:54,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:54,763 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:54,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-02 22:41:54,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:54,975 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:54,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:54,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1304669938, now seen corresponding path program 28 times [2021-11-02 22:41:54,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:54,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664472950] [2021-11-02 22:41:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:54,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-11-02 22:41:55,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:55,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664472950] [2021-11-02 22:41:55,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664472950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:55,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506798429] [2021-11-02 22:41:55,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:41:55,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:55,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:55,396 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:55,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 22:41:56,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:41:56,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:41:56,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 22:41:56,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:41:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-11-02 22:41:56,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506798429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:56,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:41:56,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-02 22:41:56,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130709897] [2021-11-02 22:41:56,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:41:56,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:56,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:41:56,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:41:56,403 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:56,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:56,465 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2021-11-02 22:41:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:41:56,465 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-02 22:41:56,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:56,466 INFO L225 Difference]: With dead ends: 216 [2021-11-02 22:41:56,466 INFO L226 Difference]: Without dead ends: 139 [2021-11-02 22:41:56,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:41:56,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-02 22:41:56,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-11-02 22:41:56,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2021-11-02 22:41:56,470 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2021-11-02 22:41:56,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:56,471 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2021-11-02 22:41:56,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:56,471 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2021-11-02 22:41:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-02 22:41:56,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:41:56,472 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:56,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-02 22:41:56,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:56,675 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:41:56,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:56,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1038865868, now seen corresponding path program 29 times [2021-11-02 22:41:56,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:56,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638757076] [2021-11-02 22:41:56,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:56,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-11-02 22:41:57,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:57,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638757076] [2021-11-02 22:41:57,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638757076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:41:57,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908503101] [2021-11-02 22:41:57,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:41:57,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:41:57,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:41:57,126 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:41:57,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 22:42:16,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-11-02 22:42:16,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:16,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:42:16,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1018 trivial. 0 not checked. [2021-11-02 22:42:16,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908503101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:16,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:42:16,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 41 [2021-11-02 22:42:16,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968497182] [2021-11-02 22:42:16,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-02 22:42:16,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:16,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-02 22:42:16,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 22:42:16,555 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 41 states, 41 states have (on average 2.682926829268293) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:16,741 INFO L93 Difference]: Finished difference Result 227 states and 238 transitions. [2021-11-02 22:42:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 22:42:16,741 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.682926829268293) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-02 22:42:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:16,742 INFO L225 Difference]: With dead ends: 227 [2021-11-02 22:42:16,743 INFO L226 Difference]: Without dead ends: 150 [2021-11-02 22:42:16,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 22:42:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-02 22:42:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2021-11-02 22:42:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 145 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2021-11-02 22:42:16,749 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 137 [2021-11-02 22:42:16,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:16,749 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2021-11-02 22:42:16,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.682926829268293) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2021-11-02 22:42:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-02 22:42:16,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:16,751 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:16,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:16,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:16,971 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:16,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1642379384, now seen corresponding path program 30 times [2021-11-02 22:42:16,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:16,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884058375] [2021-11-02 22:42:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:16,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-11-02 22:42:17,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:17,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884058375] [2021-11-02 22:42:17,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884058375] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:17,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345270951] [2021-11-02 22:42:17,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:42:17,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:17,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:17,423 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:17,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 22:42:20,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-02 22:42:20,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:20,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:42:20,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1143 trivial. 0 not checked. [2021-11-02 22:42:20,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345270951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:20,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:42:20,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 10] total 41 [2021-11-02 22:42:20,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247510922] [2021-11-02 22:42:20,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-02 22:42:20,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:20,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-02 22:42:20,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=1068, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 22:42:20,733 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 41 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 41 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:20,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:20,841 INFO L93 Difference]: Finished difference Result 235 states and 244 transitions. [2021-11-02 22:42:20,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 22:42:20,842 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 41 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-02 22:42:20,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:20,843 INFO L225 Difference]: With dead ends: 235 [2021-11-02 22:42:20,843 INFO L226 Difference]: Without dead ends: 152 [2021-11-02 22:42:20,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=1068, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 22:42:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-02 22:42:20,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-11-02 22:42:20,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 149 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:20,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2021-11-02 22:42:20,849 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 145 [2021-11-02 22:42:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:20,849 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2021-11-02 22:42:20,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 41 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:20,850 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2021-11-02 22:42:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-02 22:42:20,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:20,850 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:20,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:21,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-02 22:42:21,051 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:21,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:21,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1220684740, now seen corresponding path program 31 times [2021-11-02 22:42:21,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:21,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666331318] [2021-11-02 22:42:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:21,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-02 22:42:21,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:21,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666331318] [2021-11-02 22:42:21,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666331318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:21,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596187917] [2021-11-02 22:42:21,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:42:21,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:21,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:21,628 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:21,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 22:42:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:22,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 22:42:22,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-02 22:42:22,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596187917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:22,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:42:22,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-11-02 22:42:22,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759379952] [2021-11-02 22:42:22,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 22:42:22,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:22,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 22:42:22,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 22:42:22,748 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:22,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:22,850 INFO L93 Difference]: Finished difference Result 238 states and 246 transitions. [2021-11-02 22:42:22,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 22:42:22,851 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-02 22:42:22,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:22,852 INFO L225 Difference]: With dead ends: 238 [2021-11-02 22:42:22,852 INFO L226 Difference]: Without dead ends: 153 [2021-11-02 22:42:22,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 22:42:22,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-02 22:42:22,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-11-02 22:42:22,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.033112582781457) internal successors, (156), 151 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2021-11-02 22:42:22,858 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2021-11-02 22:42:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:22,858 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2021-11-02 22:42:22,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:22,859 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2021-11-02 22:42:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-02 22:42:22,859 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:22,860 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:22,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:23,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 22:42:23,087 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:23,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:23,088 INFO L85 PathProgramCache]: Analyzing trace with hash 164858882, now seen corresponding path program 32 times [2021-11-02 22:42:23,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:23,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382860922] [2021-11-02 22:42:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:23,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-02 22:42:23,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:23,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382860922] [2021-11-02 22:42:23,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382860922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:23,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234297901] [2021-11-02 22:42:23,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:42:23,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:23,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:23,651 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:23,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 22:42:24,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:42:24,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:24,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-02 22:42:24,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-02 22:42:24,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234297901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:24,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:42:24,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-02 22:42:24,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55011241] [2021-11-02 22:42:24,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 22:42:24,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 22:42:24,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:42:24,906 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:24,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:24,997 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2021-11-02 22:42:24,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 22:42:24,998 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-02 22:42:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:24,999 INFO L225 Difference]: With dead ends: 240 [2021-11-02 22:42:24,999 INFO L226 Difference]: Without dead ends: 155 [2021-11-02 22:42:25,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:42:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-02 22:42:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-11-02 22:42:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 153 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2021-11-02 22:42:25,006 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2021-11-02 22:42:25,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:25,006 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2021-11-02 22:42:25,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2021-11-02 22:42:25,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-02 22:42:25,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:25,008 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:25,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:25,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-02 22:42:25,223 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:25,224 INFO L85 PathProgramCache]: Analyzing trace with hash -871508800, now seen corresponding path program 33 times [2021-11-02 22:42:25,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:25,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520218646] [2021-11-02 22:42:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:25,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-02 22:42:25,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:25,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520218646] [2021-11-02 22:42:25,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520218646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:25,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844533317] [2021-11-02 22:42:25,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:42:25,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:25,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:25,845 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:25,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 22:42:27,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 22:42:27,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:27,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:42:27,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2021-11-02 22:42:28,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844533317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:28,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:42:28,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 11] total 45 [2021-11-02 22:42:28,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080649054] [2021-11-02 22:42:28,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-02 22:42:28,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:28,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-02 22:42:28,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=1296, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 22:42:28,011 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand has 45 states, 45 states have (on average 2.7333333333333334) internal successors, (123), 45 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:28,150 INFO L93 Difference]: Finished difference Result 245 states and 254 transitions. [2021-11-02 22:42:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-02 22:42:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.7333333333333334) internal successors, (123), 45 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-02 22:42:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:28,152 INFO L225 Difference]: With dead ends: 245 [2021-11-02 22:42:28,152 INFO L226 Difference]: Without dead ends: 160 [2021-11-02 22:42:28,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=684, Invalid=1296, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 22:42:28,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-02 22:42:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-11-02 22:42:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 157 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:28,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2021-11-02 22:42:28,159 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 153 [2021-11-02 22:42:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:28,159 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2021-11-02 22:42:28,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.7333333333333334) internal successors, (123), 45 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2021-11-02 22:42:28,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-02 22:42:28,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:28,161 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:28,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:28,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 22:42:28,375 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:28,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:28,376 INFO L85 PathProgramCache]: Analyzing trace with hash -926307076, now seen corresponding path program 34 times [2021-11-02 22:42:28,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:28,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337428396] [2021-11-02 22:42:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:28,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-02 22:42:28,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:28,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337428396] [2021-11-02 22:42:28,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337428396] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:28,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593692645] [2021-11-02 22:42:28,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:42:28,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:28,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:28,963 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:28,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 22:42:29,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:42:29,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:29,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:42:29,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1399 trivial. 0 not checked. [2021-11-02 22:42:30,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593692645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:30,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:42:30,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 12] total 47 [2021-11-02 22:42:30,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425300583] [2021-11-02 22:42:30,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-02 22:42:30,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:30,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-02 22:42:30,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=1431, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 22:42:30,292 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 47 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 47 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:30,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:30,487 INFO L93 Difference]: Finished difference Result 257 states and 268 transitions. [2021-11-02 22:42:30,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 22:42:30,488 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 47 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-02 22:42:30,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:30,489 INFO L225 Difference]: With dead ends: 257 [2021-11-02 22:42:30,489 INFO L226 Difference]: Without dead ends: 170 [2021-11-02 22:42:30,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=731, Invalid=1431, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 22:42:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-02 22:42:30,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2021-11-02 22:42:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0303030303030303) internal successors, (170), 165 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2021-11-02 22:42:30,511 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 157 [2021-11-02 22:42:30,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:30,511 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2021-11-02 22:42:30,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 47 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2021-11-02 22:42:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-02 22:42:30,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:30,513 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:30,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:30,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:30,726 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:30,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1127903816, now seen corresponding path program 35 times [2021-11-02 22:42:30,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:30,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590094460] [2021-11-02 22:42:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:30,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-11-02 22:42:31,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:31,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590094460] [2021-11-02 22:42:31,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590094460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:31,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884775647] [2021-11-02 22:42:31,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:42:31,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:31,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:31,422 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:31,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 22:43:01,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-11-02 22:43:01,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:01,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:43:01,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1506 trivial. 0 not checked. [2021-11-02 22:43:01,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884775647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:01,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:43:01,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 13] total 49 [2021-11-02 22:43:01,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990710359] [2021-11-02 22:43:01,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 22:43:01,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:01,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 22:43:01,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=1572, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:43:01,599 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand has 49 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:01,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:01,800 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2021-11-02 22:43:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-02 22:43:01,800 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-02 22:43:01,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:01,801 INFO L225 Difference]: With dead ends: 271 [2021-11-02 22:43:01,802 INFO L226 Difference]: Without dead ends: 178 [2021-11-02 22:43:01,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=1572, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:43:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-02 22:43:01,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2021-11-02 22:43:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0289017341040463) internal successors, (178), 173 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2021-11-02 22:43:01,809 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 165 [2021-11-02 22:43:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:01,810 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2021-11-02 22:43:01,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2021-11-02 22:43:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-02 22:43:01,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:01,811 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 11, 11, 11, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:01,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-02 22:43:02,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:02,027 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:02,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1845202060, now seen corresponding path program 36 times [2021-11-02 22:43:02,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:02,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100002817] [2021-11-02 22:43:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:02,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2021-11-02 22:43:02,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:02,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100002817] [2021-11-02 22:43:02,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100002817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:02,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391232139] [2021-11-02 22:43:02,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:43:02,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:02,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:02,723 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:02,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 22:43:07,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-02 22:43:07,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:07,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:43:07,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1659 trivial. 0 not checked. [2021-11-02 22:43:07,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391232139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:07,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:43:07,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 12] total 49 [2021-11-02 22:43:07,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532018602] [2021-11-02 22:43:07,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 22:43:07,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:07,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 22:43:07,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=806, Invalid=1546, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:43:07,546 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 49 states, 49 states have (on average 2.673469387755102) internal successors, (131), 49 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:07,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:07,688 INFO L93 Difference]: Finished difference Result 279 states and 288 transitions. [2021-11-02 22:43:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-02 22:43:07,688 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.673469387755102) internal successors, (131), 49 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-11-02 22:43:07,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:07,690 INFO L225 Difference]: With dead ends: 279 [2021-11-02 22:43:07,690 INFO L226 Difference]: Without dead ends: 180 [2021-11-02 22:43:07,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=806, Invalid=1546, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 22:43:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-02 22:43:07,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2021-11-02 22:43:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 177 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2021-11-02 22:43:07,697 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 173 [2021-11-02 22:43:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:07,697 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2021-11-02 22:43:07,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.673469387755102) internal successors, (131), 49 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2021-11-02 22:43:07,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-02 22:43:07,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:07,701 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:07,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-02 22:43:07,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 22:43:07,927 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:07,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1798241360, now seen corresponding path program 37 times [2021-11-02 22:43:07,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:07,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053668116] [2021-11-02 22:43:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:07,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1832 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-11-02 22:43:08,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:08,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053668116] [2021-11-02 22:43:08,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053668116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:08,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485210187] [2021-11-02 22:43:08,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:43:08,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:08,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:08,692 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:08,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 22:43:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:09,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 22:43:09,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1832 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-11-02 22:43:10,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485210187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:10,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:43:10,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-11-02 22:43:10,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196611450] [2021-11-02 22:43:10,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-02 22:43:10,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:10,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-02 22:43:10,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 22:43:10,175 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 41 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:10,258 INFO L93 Difference]: Finished difference Result 282 states and 290 transitions. [2021-11-02 22:43:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 22:43:10,258 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 41 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-02 22:43:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:10,259 INFO L225 Difference]: With dead ends: 282 [2021-11-02 22:43:10,259 INFO L226 Difference]: Without dead ends: 181 [2021-11-02 22:43:10,260 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 22:43:10,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-02 22:43:10,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2021-11-02 22:43:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0279329608938548) internal successors, (184), 179 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2021-11-02 22:43:10,265 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 177 [2021-11-02 22:43:10,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:10,266 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2021-11-02 22:43:10,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 41 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:10,266 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2021-11-02 22:43:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-02 22:43:10,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:10,267 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:10,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:10,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 22:43:10,483 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash -110380306, now seen corresponding path program 38 times [2021-11-02 22:43:10,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:10,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726870825] [2021-11-02 22:43:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:10,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-11-02 22:43:11,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:11,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726870825] [2021-11-02 22:43:11,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726870825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:11,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379269241] [2021-11-02 22:43:11,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:43:11,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:11,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:11,383 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:11,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 22:43:12,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:43:12,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:12,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-02 22:43:12,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-11-02 22:43:12,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379269241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:12,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:43:12,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-02 22:43:12,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529725446] [2021-11-02 22:43:12,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 22:43:12,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:12,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 22:43:12,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:43:12,949 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 42 states, 42 states have (on average 2.4761904761904763) internal successors, (104), 42 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:13,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:13,062 INFO L93 Difference]: Finished difference Result 284 states and 292 transitions. [2021-11-02 22:43:13,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 22:43:13,063 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4761904761904763) internal successors, (104), 42 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-02 22:43:13,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:13,069 INFO L225 Difference]: With dead ends: 284 [2021-11-02 22:43:13,069 INFO L226 Difference]: Without dead ends: 183 [2021-11-02 22:43:13,070 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:43:13,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-02 22:43:13,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2021-11-02 22:43:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.0276243093922652) internal successors, (186), 181 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2021-11-02 22:43:13,077 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 179 [2021-11-02 22:43:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:13,077 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2021-11-02 22:43:13,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.4761904761904763) internal successors, (104), 42 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2021-11-02 22:43:13,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-02 22:43:13,079 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:13,079 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:13,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:13,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:13,295 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:13,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:13,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1573545300, now seen corresponding path program 39 times [2021-11-02 22:43:13,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:13,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735603573] [2021-11-02 22:43:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:13,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-11-02 22:43:14,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:14,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735603573] [2021-11-02 22:43:14,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735603573] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:14,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459746736] [2021-11-02 22:43:14,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:43:14,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:14,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:14,152 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:14,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 22:43:15,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-02 22:43:15,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:15,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:43:15,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1884 trivial. 0 not checked. [2021-11-02 22:43:16,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459746736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:16,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:43:16,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 13] total 53 [2021-11-02 22:43:16,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690593454] [2021-11-02 22:43:16,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-02 22:43:16,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:16,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-02 22:43:16,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=938, Invalid=1818, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 22:43:16,447 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand has 53 states, 53 states have (on average 2.6226415094339623) internal successors, (139), 53 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:16,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:16,668 INFO L93 Difference]: Finished difference Result 289 states and 298 transitions. [2021-11-02 22:43:16,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-02 22:43:16,669 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.6226415094339623) internal successors, (139), 53 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-11-02 22:43:16,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:16,670 INFO L225 Difference]: With dead ends: 289 [2021-11-02 22:43:16,670 INFO L226 Difference]: Without dead ends: 188 [2021-11-02 22:43:16,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=938, Invalid=1818, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 22:43:16,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-02 22:43:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2021-11-02 22:43:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.027027027027027) internal successors, (190), 185 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:16,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2021-11-02 22:43:16,677 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 181 [2021-11-02 22:43:16,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:16,677 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2021-11-02 22:43:16,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.6226415094339623) internal successors, (139), 53 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:16,678 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2021-11-02 22:43:16,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-02 22:43:16,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:16,679 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:16,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:16,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:16,899 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:16,900 INFO L85 PathProgramCache]: Analyzing trace with hash -456024344, now seen corresponding path program 40 times [2021-11-02 22:43:16,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:16,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769460091] [2021-11-02 22:43:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:16,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-02 22:43:17,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:17,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769460091] [2021-11-02 22:43:17,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769460091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:17,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028161339] [2021-11-02 22:43:17,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:43:17,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:17,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:17,740 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:17,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 22:43:19,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:43:19,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:19,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:43:19,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2021-11-02 22:43:19,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028161339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:19,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:43:19,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 14] total 55 [2021-11-02 22:43:19,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14846419] [2021-11-02 22:43:19,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-02 22:43:19,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:19,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-02 22:43:19,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 22:43:19,716 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand has 55 states, 55 states have (on average 2.6) internal successors, (143), 55 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:19,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:19,896 INFO L93 Difference]: Finished difference Result 295 states and 304 transitions. [2021-11-02 22:43:19,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-02 22:43:19,896 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.6) internal successors, (143), 55 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-11-02 22:43:19,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:19,898 INFO L225 Difference]: With dead ends: 295 [2021-11-02 22:43:19,898 INFO L226 Difference]: Without dead ends: 192 [2021-11-02 22:43:19,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 22:43:19,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-02 22:43:19,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2021-11-02 22:43:19,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.0264550264550265) internal successors, (194), 189 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:19,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2021-11-02 22:43:19,906 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 185 [2021-11-02 22:43:19,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:19,906 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2021-11-02 22:43:19,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.6) internal successors, (143), 55 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:19,907 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2021-11-02 22:43:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-02 22:43:19,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:19,908 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:19,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:20,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-02 22:43:20,129 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:20,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:20,129 INFO L85 PathProgramCache]: Analyzing trace with hash -91556572, now seen corresponding path program 41 times [2021-11-02 22:43:20,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:20,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410114335] [2021-11-02 22:43:20,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:20,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2188 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-11-02 22:43:20,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:20,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410114335] [2021-11-02 22:43:20,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410114335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:20,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316429554] [2021-11-02 22:43:20,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:43:20,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:20,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:20,960 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:20,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 22:47:35,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-11-02 22:47:35,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:47:35,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 22:47:35,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:47:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2188 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-11-02 22:47:36,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316429554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:47:36,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:47:36,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-02 22:47:36,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588461304] [2021-11-02 22:47:36,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-02 22:47:36,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:36,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-02 22:47:36,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 22:47:36,459 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand has 45 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 45 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:36,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:36,567 INFO L93 Difference]: Finished difference Result 298 states and 306 transitions. [2021-11-02 22:47:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 22:47:36,568 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 45 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-11-02 22:47:36,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:36,569 INFO L225 Difference]: With dead ends: 298 [2021-11-02 22:47:36,569 INFO L226 Difference]: Without dead ends: 193 [2021-11-02 22:47:36,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-02 22:47:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-02 22:47:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-11-02 22:47:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0261780104712042) internal successors, (196), 191 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2021-11-02 22:47:36,576 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 189 [2021-11-02 22:47:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:36,577 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2021-11-02 22:47:36,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 45 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:36,577 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2021-11-02 22:47:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-02 22:47:36,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:36,578 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:47:36,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-02 22:47:36,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-02 22:47:36,795 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:36,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:36,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1249460382, now seen corresponding path program 42 times [2021-11-02 22:47:36,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:36,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972256560] [2021-11-02 22:47:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:36,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2271 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-11-02 22:47:37,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:37,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972256560] [2021-11-02 22:47:37,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972256560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:47:37,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236668312] [2021-11-02 22:47:37,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:47:37,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:47:37,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:47:37,598 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:47:37,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-02 22:47:53,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-02 22:47:53,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:47:53,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:47:53,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:47:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2271 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2150 trivial. 0 not checked. [2021-11-02 22:47:54,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236668312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:47:54,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:47:54,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 14] total 57 [2021-11-02 22:47:54,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843314064] [2021-11-02 22:47:54,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-02 22:47:54,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:54,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-02 22:47:54,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=2112, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 22:47:54,485 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 57 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:54,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:54,708 INFO L93 Difference]: Finished difference Result 309 states and 320 transitions. [2021-11-02 22:47:54,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-02 22:47:54,708 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 57 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-02 22:47:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:54,710 INFO L225 Difference]: With dead ends: 309 [2021-11-02 22:47:54,710 INFO L226 Difference]: Without dead ends: 204 [2021-11-02 22:47:54,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1080, Invalid=2112, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 22:47:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-02 22:47:54,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2021-11-02 22:47:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0251256281407035) internal successors, (204), 199 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2021-11-02 22:47:54,717 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 191 [2021-11-02 22:47:54,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:54,718 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2021-11-02 22:47:54,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 57 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:54,718 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2021-11-02 22:47:54,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-02 22:47:54,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:54,720 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:47:54,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-02 22:47:54,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-02 22:47:54,935 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1792407266, now seen corresponding path program 43 times [2021-11-02 22:47:54,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:54,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355176339] [2021-11-02 22:47:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:54,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-02 22:47:55,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:55,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355176339] [2021-11-02 22:47:55,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355176339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:47:55,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388974856] [2021-11-02 22:47:55,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:47:55,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:47:55,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:47:55,755 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:47:55,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-02 22:47:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:57,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 22:47:57,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:47:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-02 22:47:57,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388974856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:47:57,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:47:57,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-11-02 22:47:57,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84562058] [2021-11-02 22:47:57,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-02 22:47:57,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:57,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-02 22:47:57,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 22:47:57,453 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 47 states, 47 states have (on average 2.425531914893617) internal successors, (114), 47 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:57,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:57,599 INFO L93 Difference]: Finished difference Result 314 states and 322 transitions. [2021-11-02 22:47:57,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-02 22:47:57,600 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.425531914893617) internal successors, (114), 47 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-11-02 22:47:57,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:57,601 INFO L225 Difference]: With dead ends: 314 [2021-11-02 22:47:57,601 INFO L226 Difference]: Without dead ends: 203 [2021-11-02 22:47:57,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 22:47:57,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-02 22:47:57,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2021-11-02 22:47:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0248756218905473) internal successors, (206), 201 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:57,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2021-11-02 22:47:57,609 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 199 [2021-11-02 22:47:57,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:57,609 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2021-11-02 22:47:57,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.425531914893617) internal successors, (114), 47 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:57,610 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2021-11-02 22:47:57,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-02 22:47:57,611 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:57,611 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:47:57,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-02 22:47:57,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:47:57,825 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:57,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:57,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1764450852, now seen corresponding path program 44 times [2021-11-02 22:47:57,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:57,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890198312] [2021-11-02 22:47:57,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:57,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-02 22:47:58,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:58,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890198312] [2021-11-02 22:47:58,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890198312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:47:58,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321969029] [2021-11-02 22:47:58,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:47:58,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:47:58,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:47:58,694 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:47:58,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-02 22:48:00,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:48:00,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:00,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 22:48:00,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-02 22:48:00,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321969029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:00,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:00,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-02 22:48:00,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306368784] [2021-11-02 22:48:00,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-02 22:48:00,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:00,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-02 22:48:00,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 22:48:00,554 INFO L87 Difference]: Start difference. First operand 202 states and 206 transitions. Second operand has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:00,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:00,642 INFO L93 Difference]: Finished difference Result 316 states and 324 transitions. [2021-11-02 22:48:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 22:48:00,642 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-11-02 22:48:00,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:00,643 INFO L225 Difference]: With dead ends: 316 [2021-11-02 22:48:00,643 INFO L226 Difference]: Without dead ends: 205 [2021-11-02 22:48:00,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 22:48:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-02 22:48:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2021-11-02 22:48:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0246305418719213) internal successors, (208), 203 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2021-11-02 22:48:00,651 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 201 [2021-11-02 22:48:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:00,651 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2021-11-02 22:48:00,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2021-11-02 22:48:00,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-02 22:48:00,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:00,653 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:00,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-02 22:48:00,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-02 22:48:00,866 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:00,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:00,867 INFO L85 PathProgramCache]: Analyzing trace with hash -668140774, now seen corresponding path program 45 times [2021-11-02 22:48:00,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:00,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730699023] [2021-11-02 22:48:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:00,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-02 22:48:01,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:01,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730699023] [2021-11-02 22:48:01,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730699023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:01,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824337647] [2021-11-02 22:48:01,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:48:01,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:01,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:01,853 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:01,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-02 22:48:05,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-02 22:48:05,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:05,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-02 22:48:05,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 112 proven. 144 refuted. 0 times theorem prover too weak. 2345 trivial. 0 not checked. [2021-11-02 22:48:06,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824337647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:06,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:06,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 19] total 65 [2021-11-02 22:48:06,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952890548] [2021-11-02 22:48:06,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-02 22:48:06,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:06,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-02 22:48:06,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1360, Invalid=2800, Unknown=0, NotChecked=0, Total=4160 [2021-11-02 22:48:06,347 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 65 states, 65 states have (on average 2.3692307692307693) internal successors, (154), 65 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:06,989 INFO L93 Difference]: Finished difference Result 331 states and 346 transitions. [2021-11-02 22:48:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-02 22:48:06,990 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.3692307692307693) internal successors, (154), 65 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-11-02 22:48:06,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:06,991 INFO L225 Difference]: With dead ends: 331 [2021-11-02 22:48:06,991 INFO L226 Difference]: Without dead ends: 220 [2021-11-02 22:48:06,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1630, Invalid=4690, Unknown=0, NotChecked=0, Total=6320 [2021-11-02 22:48:06,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-02 22:48:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-11-02 22:48:06,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0228310502283104) internal successors, (224), 219 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 224 transitions. [2021-11-02 22:48:07,000 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 224 transitions. Word has length 203 [2021-11-02 22:48:07,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:07,000 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 224 transitions. [2021-11-02 22:48:07,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.3692307692307693) internal successors, (154), 65 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:07,001 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 224 transitions. [2021-11-02 22:48:07,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-02 22:48:07,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:07,002 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 14, 14, 14, 14, 14, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:07,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:07,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-02 22:48:07,216 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:07,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:07,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1883383186, now seen corresponding path program 46 times [2021-11-02 22:48:07,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:07,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061446309] [2021-11-02 22:48:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:07,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2941 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2021-11-02 22:48:08,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:08,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061446309] [2021-11-02 22:48:08,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061446309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:08,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621342163] [2021-11-02 22:48:08,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:48:08,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:08,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:08,288 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:08,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-02 22:48:09,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:48:09,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:09,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 22:48:09,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2941 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2021-11-02 22:48:10,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621342163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:10,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:10,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-11-02 22:48:10,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806661751] [2021-11-02 22:48:10,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-02 22:48:10,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:10,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-02 22:48:10,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 22:48:10,371 INFO L87 Difference]: Start difference. First operand 220 states and 224 transitions. Second operand has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:10,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:10,463 INFO L93 Difference]: Finished difference Result 346 states and 354 transitions. [2021-11-02 22:48:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-02 22:48:10,464 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2021-11-02 22:48:10,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:10,466 INFO L225 Difference]: With dead ends: 346 [2021-11-02 22:48:10,466 INFO L226 Difference]: Without dead ends: 223 [2021-11-02 22:48:10,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 22:48:10,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-02 22:48:10,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2021-11-02 22:48:10,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.0226244343891402) internal successors, (226), 221 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 226 transitions. [2021-11-02 22:48:10,474 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 226 transitions. Word has length 219 [2021-11-02 22:48:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:10,474 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 226 transitions. [2021-11-02 22:48:10,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.392156862745098) internal successors, (122), 51 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 226 transitions. [2021-11-02 22:48:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-02 22:48:10,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:10,476 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 14, 14, 14, 14, 14, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:10,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:10,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-02 22:48:10,691 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:10,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:10,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1067389104, now seen corresponding path program 47 times [2021-11-02 22:48:10,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:10,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774780039] [2021-11-02 22:48:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:10,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2021-11-02 22:48:11,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:11,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774780039] [2021-11-02 22:48:11,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774780039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:11,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317068616] [2021-11-02 22:48:11,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:48:11,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:11,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:11,652 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:11,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b160ffc3-7b87-43a5-95e4-a0ad64b90aed/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process