./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y --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 d827a13f264a8106bf76fcdb72d7bd8ed8c070aef2487e4bd9a858009359b9d5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:30:59,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:30:59,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:30:59,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:30:59,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:30:59,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:30:59,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:30:59,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:30:59,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:30:59,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:30:59,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:30:59,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:30:59,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:30:59,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:30:59,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:30:59,575 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:30:59,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:30:59,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:30:59,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:30:59,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:30:59,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:30:59,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:30:59,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:30:59,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:30:59,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:30:59,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:30:59,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:30:59,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:30:59,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:30:59,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:30:59,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:30:59,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:30:59,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:30:59,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:30:59,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:30:59,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:30:59,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:30:59,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:30:59,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:30:59,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:30:59,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:30:59,629 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:30:59,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:30:59,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:30:59,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:30:59,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:30:59,686 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:30:59,686 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:30:59,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:30:59,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:30:59,688 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:30:59,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:30:59,689 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:30:59,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:30:59,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:30:59,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:30:59,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:30:59,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:30:59,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:30:59,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:30:59,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:30:59,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:30:59,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:30:59,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:30:59,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:30:59,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:30:59,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:30:59,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:30:59,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:30:59,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:30:59,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:30:59,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:30:59,696 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:30:59,696 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:30:59,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:30:59,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:30:59,697 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_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d827a13f264a8106bf76fcdb72d7bd8ed8c070aef2487e4bd9a858009359b9d5 [2021-11-13 17:30:59,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:30:59,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:30:59,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:30:59,979 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:30:59,980 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:30:59,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/systemc/token_ring.15.cil.c [2021-11-13 17:31:00,079 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/data/bb460b570/c946ae9e0c6e4b3f9330b5a25f79d5d8/FLAG4ed5295db [2021-11-13 17:31:00,670 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:31:00,670 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/sv-benchmarks/c/systemc/token_ring.15.cil.c [2021-11-13 17:31:00,693 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/data/bb460b570/c946ae9e0c6e4b3f9330b5a25f79d5d8/FLAG4ed5295db [2021-11-13 17:31:00,966 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/data/bb460b570/c946ae9e0c6e4b3f9330b5a25f79d5d8 [2021-11-13 17:31:00,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:31:00,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:31:00,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:31:00,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:31:00,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:31:00,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:31:00" (1/1) ... [2021-11-13 17:31:00,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13ca776c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:00, skipping insertion in model container [2021-11-13 17:31:00,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:31:00" (1/1) ... [2021-11-13 17:31:00,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:31:01,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:31:01,227 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_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/sv-benchmarks/c/systemc/token_ring.15.cil.c[669,682] [2021-11-13 17:31:01,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:31:01,403 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:31:01,431 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_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/sv-benchmarks/c/systemc/token_ring.15.cil.c[669,682] [2021-11-13 17:31:01,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:31:01,549 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:31:01,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:01 WrapperNode [2021-11-13 17:31:01,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:31:01,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:31:01,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:31:01,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:31:01,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:01" (1/1) ... [2021-11-13 17:31:01,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:01" (1/1) ... [2021-11-13 17:31:01,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:31:01,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:31:01,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:31:01,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:31:01,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:01" (1/1) ... [2021-11-13 17:31:01,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:01" (1/1) ... [2021-11-13 17:31:01,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:01" (1/1) ... [2021-11-13 17:31:01,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:01" (1/1) ... [2021-11-13 17:31:01,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:01" (1/1) ... [2021-11-13 17:31:01,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:01" (1/1) ... [2021-11-13 17:31:01,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:01" (1/1) ... [2021-11-13 17:31:01,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:31:01,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:31:01,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:31:01,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:31:01,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:01" (1/1) ... [2021-11-13 17:31:01,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:31:01,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:31:01,797 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:31:01,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:31:01,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:31:01,850 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 17:31:01,850 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 17:31:01,850 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 17:31:01,850 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 17:31:01,851 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 17:31:01,851 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 17:31:01,851 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-13 17:31:01,851 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-13 17:31:01,851 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 17:31:01,852 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 17:31:01,852 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 17:31:01,852 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 17:31:01,852 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 17:31:01,852 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 17:31:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:31:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:31:01,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:31:03,020 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:31:03,021 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-11-13 17:31:03,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:31:03 BoogieIcfgContainer [2021-11-13 17:31:03,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:31:03,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:31:03,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:31:03,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:31:03,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:31:00" (1/3) ... [2021-11-13 17:31:03,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2d6dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:31:03, skipping insertion in model container [2021-11-13 17:31:03,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:01" (2/3) ... [2021-11-13 17:31:03,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2d6dbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:31:03, skipping insertion in model container [2021-11-13 17:31:03,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:31:03" (3/3) ... [2021-11-13 17:31:03,034 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.15.cil.c [2021-11-13 17:31:03,040 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:31:03,040 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:31:03,112 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:31:03,122 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 [2021-11-13 17:31:03,122 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:31:03,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 413 states, 375 states have (on average 1.6693333333333333) internal successors, (626), 379 states have internal predecessors, (626), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-13 17:31:03,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:03,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:03,205 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:03,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:03,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:03,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2071050250, now seen corresponding path program 1 times [2021-11-13 17:31:03,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:03,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121207105] [2021-11-13 17:31:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:03,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:03,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:03,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:03,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:03,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:03,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:03,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:03,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121207105] [2021-11-13 17:31:03,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121207105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:03,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:03,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:31:03,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012802594] [2021-11-13 17:31:03,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:03,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:31:03,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:03,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:31:03,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:31:03,898 INFO L87 Difference]: Start difference. First operand has 413 states, 375 states have (on average 1.6693333333333333) internal successors, (626), 379 states have internal predecessors, (626), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 5 states, 5 states have (on average 35.6) internal successors, (178), 3 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:06,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:06,528 INFO L93 Difference]: Finished difference Result 965 states and 1611 transitions. [2021-11-13 17:31:06,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:31:06,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.6) internal successors, (178), 3 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:06,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:06,553 INFO L225 Difference]: With dead ends: 965 [2021-11-13 17:31:06,553 INFO L226 Difference]: Without dead ends: 560 [2021-11-13 17:31:06,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:31:06,566 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 1113 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1728.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 58.61ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2033.46ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:06,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 1168 Invalid, 821 Unknown, 0 Unchecked, 58.61ms Time], IncrementalHoareTripleChecker [66 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 2033.46ms Time] [2021-11-13 17:31:06,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-13 17:31:06,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 407. [2021-11-13 17:31:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.582210242587601) internal successors, (587), 373 states have internal predecessors, (587), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 643 transitions. [2021-11-13 17:31:06,708 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 643 transitions. Word has length 189 [2021-11-13 17:31:06,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:06,709 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 643 transitions. [2021-11-13 17:31:06,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.6) internal successors, (178), 3 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 643 transitions. [2021-11-13 17:31:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:06,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:06,717 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:06,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:31:06,718 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:06,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:06,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1618142264, now seen corresponding path program 1 times [2021-11-13 17:31:06,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:06,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522985575] [2021-11-13 17:31:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:06,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:06,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:06,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:07,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:07,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:07,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:07,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:07,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522985575] [2021-11-13 17:31:07,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522985575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:07,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:07,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 17:31:07,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479887219] [2021-11-13 17:31:07,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:07,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:31:07,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:07,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:31:07,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:31:07,064 INFO L87 Difference]: Start difference. First operand 407 states and 643 transitions. Second operand has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 4 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:09,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:09,677 INFO L93 Difference]: Finished difference Result 945 states and 1514 transitions. [2021-11-13 17:31:09,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:31:09,678 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 4 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:09,684 INFO L225 Difference]: With dead ends: 945 [2021-11-13 17:31:09,684 INFO L226 Difference]: Without dead ends: 559 [2021-11-13 17:31:09,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:31:09,689 INFO L933 BasicCegarLoop]: 664 mSDtfsCounter, 1096 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1889.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.91ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2163.57ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:09,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1117 Valid, 1388 Invalid, 1492 Unknown, 0 Unchecked, 45.91ms Time], IncrementalHoareTripleChecker [72 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 2163.57ms Time] [2021-11-13 17:31:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-13 17:31:09,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 407. [2021-11-13 17:31:09,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.5795148247978437) internal successors, (586), 373 states have internal predecessors, (586), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:09,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 642 transitions. [2021-11-13 17:31:09,751 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 642 transitions. Word has length 189 [2021-11-13 17:31:09,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:09,752 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 642 transitions. [2021-11-13 17:31:09,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 4 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:09,753 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 642 transitions. [2021-11-13 17:31:09,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:09,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:09,756 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:09,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:31:09,757 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:09,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2126921078, now seen corresponding path program 1 times [2021-11-13 17:31:09,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:09,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472658067] [2021-11-13 17:31:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:09,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:09,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:09,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:09,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:10,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:10,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:10,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:10,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472658067] [2021-11-13 17:31:10,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472658067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:10,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:10,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:10,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349545857] [2021-11-13 17:31:10,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:10,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:10,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:10,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:10,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:10,058 INFO L87 Difference]: Start difference. First operand 407 states and 642 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:12,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:12,394 INFO L93 Difference]: Finished difference Result 972 states and 1565 transitions. [2021-11-13 17:31:12,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:12,395 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:12,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:12,400 INFO L225 Difference]: With dead ends: 972 [2021-11-13 17:31:12,401 INFO L226 Difference]: Without dead ends: 586 [2021-11-13 17:31:12,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:12,404 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 1379 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1667.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.51ms SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1927.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:12,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1400 Valid, 1514 Invalid, 1555 Unknown, 0 Unchecked, 38.51ms Time], IncrementalHoareTripleChecker [108 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 1927.00ms Time] [2021-11-13 17:31:12,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-13 17:31:12,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 407. [2021-11-13 17:31:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.5768194070080863) internal successors, (585), 373 states have internal predecessors, (585), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:12,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 641 transitions. [2021-11-13 17:31:12,463 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 641 transitions. Word has length 189 [2021-11-13 17:31:12,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:12,464 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 641 transitions. [2021-11-13 17:31:12,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:12,465 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 641 transitions. [2021-11-13 17:31:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:12,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:12,468 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:12,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:31:12,469 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:12,470 INFO L85 PathProgramCache]: Analyzing trace with hash 203670648, now seen corresponding path program 1 times [2021-11-13 17:31:12,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:12,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446786781] [2021-11-13 17:31:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:12,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:12,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:12,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:12,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:12,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:12,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:12,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:12,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446786781] [2021-11-13 17:31:12,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446786781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:12,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:12,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:12,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195643820] [2021-11-13 17:31:12,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:12,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:12,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:12,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:12,702 INFO L87 Difference]: Start difference. First operand 407 states and 641 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:15,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:15,245 INFO L93 Difference]: Finished difference Result 970 states and 1559 transitions. [2021-11-13 17:31:15,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:15,246 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:15,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:15,251 INFO L225 Difference]: With dead ends: 970 [2021-11-13 17:31:15,251 INFO L226 Difference]: Without dead ends: 584 [2021-11-13 17:31:15,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:15,255 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 1199 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1899.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.69ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2169.39ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:15,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 1720 Invalid, 1699 Unknown, 0 Unchecked, 28.69ms Time], IncrementalHoareTripleChecker [80 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 2169.39ms Time] [2021-11-13 17:31:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-11-13 17:31:15,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 407. [2021-11-13 17:31:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.5741239892183287) internal successors, (584), 373 states have internal predecessors, (584), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 640 transitions. [2021-11-13 17:31:15,302 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 640 transitions. Word has length 189 [2021-11-13 17:31:15,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:15,303 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 640 transitions. [2021-11-13 17:31:15,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 640 transitions. [2021-11-13 17:31:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:15,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:15,307 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:15,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:31:15,308 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:15,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:15,308 INFO L85 PathProgramCache]: Analyzing trace with hash 702227450, now seen corresponding path program 1 times [2021-11-13 17:31:15,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:15,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778799560] [2021-11-13 17:31:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:15,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:15,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:15,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:15,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:15,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:15,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:15,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:15,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778799560] [2021-11-13 17:31:15,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778799560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:15,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:15,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:15,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345238730] [2021-11-13 17:31:15,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:15,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:15,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:15,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:15,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:15,506 INFO L87 Difference]: Start difference. First operand 407 states and 640 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:17,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:17,612 INFO L93 Difference]: Finished difference Result 969 states and 1554 transitions. [2021-11-13 17:31:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:17,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:17,619 INFO L225 Difference]: With dead ends: 969 [2021-11-13 17:31:17,619 INFO L226 Difference]: Without dead ends: 583 [2021-11-13 17:31:17,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:17,634 INFO L933 BasicCegarLoop]: 699 mSDtfsCounter, 1375 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1491.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.51ms SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1751.82ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:17,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1396 Valid, 1504 Invalid, 1532 Unknown, 0 Unchecked, 21.51ms Time], IncrementalHoareTripleChecker [109 Valid, 1423 Invalid, 0 Unknown, 0 Unchecked, 1751.82ms Time] [2021-11-13 17:31:17,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-13 17:31:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 407. [2021-11-13 17:31:17,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.5714285714285714) internal successors, (583), 373 states have internal predecessors, (583), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 639 transitions. [2021-11-13 17:31:17,701 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 639 transitions. Word has length 189 [2021-11-13 17:31:17,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:17,702 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 639 transitions. [2021-11-13 17:31:17,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 639 transitions. [2021-11-13 17:31:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:17,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:17,707 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:17,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:31:17,708 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1272499256, now seen corresponding path program 1 times [2021-11-13 17:31:17,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:17,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301735809] [2021-11-13 17:31:17,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:17,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:17,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:17,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:17,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:17,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:17,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:17,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:17,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301735809] [2021-11-13 17:31:17,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301735809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:17,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:17,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:17,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244131180] [2021-11-13 17:31:17,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:17,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:17,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:17,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:17,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:17,932 INFO L87 Difference]: Start difference. First operand 407 states and 639 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:20,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:20,299 INFO L93 Difference]: Finished difference Result 968 states and 1549 transitions. [2021-11-13 17:31:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:20,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:20,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:20,316 INFO L225 Difference]: With dead ends: 968 [2021-11-13 17:31:20,317 INFO L226 Difference]: Without dead ends: 582 [2021-11-13 17:31:20,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:20,323 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 1195 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1726.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 1712 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.12ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1996.67ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:20,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1216 Valid, 1712 Invalid, 1675 Unknown, 0 Unchecked, 24.12ms Time], IncrementalHoareTripleChecker [80 Valid, 1595 Invalid, 0 Unknown, 0 Unchecked, 1996.67ms Time] [2021-11-13 17:31:20,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-13 17:31:20,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 407. [2021-11-13 17:31:20,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.568733153638814) internal successors, (582), 373 states have internal predecessors, (582), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:20,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 638 transitions. [2021-11-13 17:31:20,391 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 638 transitions. Word has length 189 [2021-11-13 17:31:20,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:20,391 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 638 transitions. [2021-11-13 17:31:20,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 638 transitions. [2021-11-13 17:31:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:20,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:20,394 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:20,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 17:31:20,395 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:20,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:20,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1618598854, now seen corresponding path program 1 times [2021-11-13 17:31:20,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:20,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119411036] [2021-11-13 17:31:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:20,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:20,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:20,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:20,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:20,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:20,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:20,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:20,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119411036] [2021-11-13 17:31:20,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119411036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:20,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:20,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:20,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070745606] [2021-11-13 17:31:20,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:20,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:20,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:20,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:20,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:20,608 INFO L87 Difference]: Start difference. First operand 407 states and 638 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:22,921 INFO L93 Difference]: Finished difference Result 967 states and 1544 transitions. [2021-11-13 17:31:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:22,922 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:22,926 INFO L225 Difference]: With dead ends: 967 [2021-11-13 17:31:22,927 INFO L226 Difference]: Without dead ends: 581 [2021-11-13 17:31:22,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:22,930 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 1279 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1702.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1300 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.39ms SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1979.70ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:22,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1300 Valid, 1661 Invalid, 1573 Unknown, 0 Unchecked, 23.39ms Time], IncrementalHoareTripleChecker [82 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 1979.70ms Time] [2021-11-13 17:31:22,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-11-13 17:31:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 407. [2021-11-13 17:31:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.5660377358490567) internal successors, (581), 373 states have internal predecessors, (581), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:22,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 637 transitions. [2021-11-13 17:31:22,978 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 637 transitions. Word has length 189 [2021-11-13 17:31:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:22,979 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 637 transitions. [2021-11-13 17:31:22,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:22,979 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 637 transitions. [2021-11-13 17:31:22,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:22,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:22,982 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:22,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 17:31:22,983 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:22,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:22,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1890370552, now seen corresponding path program 1 times [2021-11-13 17:31:22,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:22,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179472243] [2021-11-13 17:31:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:22,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:23,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:23,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:23,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:23,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:23,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:23,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:23,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179472243] [2021-11-13 17:31:23,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179472243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:23,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:23,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:23,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478309254] [2021-11-13 17:31:23,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:23,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:23,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:23,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:23,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:23,166 INFO L87 Difference]: Start difference. First operand 407 states and 637 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:25,199 INFO L93 Difference]: Finished difference Result 966 states and 1539 transitions. [2021-11-13 17:31:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:25,204 INFO L225 Difference]: With dead ends: 966 [2021-11-13 17:31:25,204 INFO L226 Difference]: Without dead ends: 580 [2021-11-13 17:31:25,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:25,207 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 1369 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1441.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1390 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.49ms SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1676.71ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:25,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1390 Valid, 1492 Invalid, 1502 Unknown, 0 Unchecked, 19.49ms Time], IncrementalHoareTripleChecker [109 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 1676.71ms Time] [2021-11-13 17:31:25,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-13 17:31:25,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 407. [2021-11-13 17:31:25,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.5633423180592991) internal successors, (580), 373 states have internal predecessors, (580), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:25,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 636 transitions. [2021-11-13 17:31:25,258 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 636 transitions. Word has length 189 [2021-11-13 17:31:25,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:25,259 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 636 transitions. [2021-11-13 17:31:25,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:25,259 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 636 transitions. [2021-11-13 17:31:25,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:25,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:25,262 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:25,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 17:31:25,262 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:25,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:25,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1737214854, now seen corresponding path program 1 times [2021-11-13 17:31:25,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:25,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924891839] [2021-11-13 17:31:25,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:25,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:25,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:25,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:25,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:25,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:25,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:25,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:25,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924891839] [2021-11-13 17:31:25,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924891839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:25,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:25,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:25,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723588060] [2021-11-13 17:31:25,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:25,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:25,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:25,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:25,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:25,490 INFO L87 Difference]: Start difference. First operand 407 states and 636 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:27,838 INFO L93 Difference]: Finished difference Result 965 states and 1534 transitions. [2021-11-13 17:31:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:27,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:27,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:27,843 INFO L225 Difference]: With dead ends: 965 [2021-11-13 17:31:27,843 INFO L226 Difference]: Without dead ends: 579 [2021-11-13 17:31:27,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:27,846 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 1189 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1714.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 1700 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.16ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1970.99ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:27,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1210 Valid, 1700 Invalid, 1639 Unknown, 0 Unchecked, 22.16ms Time], IncrementalHoareTripleChecker [80 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 1970.99ms Time] [2021-11-13 17:31:27,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-13 17:31:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 407. [2021-11-13 17:31:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.5606469002695418) internal successors, (579), 373 states have internal predecessors, (579), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 635 transitions. [2021-11-13 17:31:27,897 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 635 transitions. Word has length 189 [2021-11-13 17:31:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:27,898 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 635 transitions. [2021-11-13 17:31:27,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:27,899 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 635 transitions. [2021-11-13 17:31:27,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:27,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:27,901 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:27,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 17:31:27,902 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:27,905 INFO L85 PathProgramCache]: Analyzing trace with hash 362523576, now seen corresponding path program 1 times [2021-11-13 17:31:27,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:27,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217761504] [2021-11-13 17:31:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:27,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:27,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:28,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:28,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:28,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:28,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:28,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:28,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217761504] [2021-11-13 17:31:28,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217761504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:28,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:28,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:28,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499229301] [2021-11-13 17:31:28,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:28,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:28,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:28,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:28,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:28,112 INFO L87 Difference]: Start difference. First operand 407 states and 635 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:30,392 INFO L93 Difference]: Finished difference Result 964 states and 1529 transitions. [2021-11-13 17:31:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:30,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:30,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:30,397 INFO L225 Difference]: With dead ends: 964 [2021-11-13 17:31:30,398 INFO L226 Difference]: Without dead ends: 578 [2021-11-13 17:31:30,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:30,400 INFO L933 BasicCegarLoop]: 677 mSDtfsCounter, 1189 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1652.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.63ms SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1917.86ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:30,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1210 Valid, 1694 Invalid, 1627 Unknown, 0 Unchecked, 22.63ms Time], IncrementalHoareTripleChecker [83 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 1917.86ms Time] [2021-11-13 17:31:30,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-13 17:31:30,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 407. [2021-11-13 17:31:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.5579514824797844) internal successors, (578), 373 states have internal predecessors, (578), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 634 transitions. [2021-11-13 17:31:30,469 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 634 transitions. Word has length 189 [2021-11-13 17:31:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:30,470 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 634 transitions. [2021-11-13 17:31:30,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 634 transitions. [2021-11-13 17:31:30,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:30,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:30,472 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:30,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 17:31:30,473 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:30,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:30,474 INFO L85 PathProgramCache]: Analyzing trace with hash 707351738, now seen corresponding path program 1 times [2021-11-13 17:31:30,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:30,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171594333] [2021-11-13 17:31:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:30,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:30,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:30,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:30,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:30,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:30,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:30,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:30,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171594333] [2021-11-13 17:31:30,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171594333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:30,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:30,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:30,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65778988] [2021-11-13 17:31:30,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:30,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:30,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:30,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:30,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:30,653 INFO L87 Difference]: Start difference. First operand 407 states and 634 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:32,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:32,387 INFO L93 Difference]: Finished difference Result 962 states and 1522 transitions. [2021-11-13 17:31:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:32,387 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:32,391 INFO L225 Difference]: With dead ends: 962 [2021-11-13 17:31:32,392 INFO L226 Difference]: Without dead ends: 576 [2021-11-13 17:31:32,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:32,394 INFO L933 BasicCegarLoop]: 671 mSDtfsCounter, 1364 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1189.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.96ms SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1429.66ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:32,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1385 Valid, 1476 Invalid, 1468 Unknown, 0 Unchecked, 13.96ms Time], IncrementalHoareTripleChecker [112 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 1429.66ms Time] [2021-11-13 17:31:32,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-13 17:31:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 407. [2021-11-13 17:31:32,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.5552560646900269) internal successors, (577), 373 states have internal predecessors, (577), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 633 transitions. [2021-11-13 17:31:32,448 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 633 transitions. Word has length 189 [2021-11-13 17:31:32,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:32,449 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 633 transitions. [2021-11-13 17:31:32,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 633 transitions. [2021-11-13 17:31:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:32,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:32,451 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:32,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 17:31:32,452 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:32,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:32,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1062119876, now seen corresponding path program 1 times [2021-11-13 17:31:32,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:32,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610470451] [2021-11-13 17:31:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:32,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:32,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:32,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:32,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:32,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:32,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:32,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:32,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610470451] [2021-11-13 17:31:32,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610470451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:32,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:32,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:32,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629690243] [2021-11-13 17:31:32,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:32,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:32,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:32,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:32,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:32,642 INFO L87 Difference]: Start difference. First operand 407 states and 633 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:34,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:34,292 INFO L93 Difference]: Finished difference Result 961 states and 1517 transitions. [2021-11-13 17:31:34,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:34,292 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:34,296 INFO L225 Difference]: With dead ends: 961 [2021-11-13 17:31:34,296 INFO L226 Difference]: Without dead ends: 575 [2021-11-13 17:31:34,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:34,299 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 1362 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1133.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.63ms SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1329.22ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:34,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1383 Valid, 1472 Invalid, 1458 Unknown, 0 Unchecked, 13.63ms Time], IncrementalHoareTripleChecker [112 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 1329.22ms Time] [2021-11-13 17:31:34,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-13 17:31:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 407. [2021-11-13 17:31:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.5525606469002695) internal successors, (576), 373 states have internal predecessors, (576), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 632 transitions. [2021-11-13 17:31:34,354 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 632 transitions. Word has length 189 [2021-11-13 17:31:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:34,354 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 632 transitions. [2021-11-13 17:31:34,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 632 transitions. [2021-11-13 17:31:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:34,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:34,356 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:34,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 17:31:34,356 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:34,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1673388934, now seen corresponding path program 1 times [2021-11-13 17:31:34,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:34,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84941489] [2021-11-13 17:31:34,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:34,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:34,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:34,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:34,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:34,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:34,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:34,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:34,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84941489] [2021-11-13 17:31:34,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84941489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:34,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:34,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:34,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224223238] [2021-11-13 17:31:34,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:34,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:34,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:34,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:34,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:34,532 INFO L87 Difference]: Start difference. First operand 407 states and 632 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:36,084 INFO L93 Difference]: Finished difference Result 960 states and 1512 transitions. [2021-11-13 17:31:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:36,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:36,089 INFO L225 Difference]: With dead ends: 960 [2021-11-13 17:31:36,089 INFO L226 Difference]: Without dead ends: 574 [2021-11-13 17:31:36,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:36,092 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 1360 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1083.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.90ms SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1269.26ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:36,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1381 Valid, 1468 Invalid, 1448 Unknown, 0 Unchecked, 11.90ms Time], IncrementalHoareTripleChecker [112 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 1269.26ms Time] [2021-11-13 17:31:36,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-13 17:31:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 407. [2021-11-13 17:31:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.5498652291105122) internal successors, (575), 373 states have internal predecessors, (575), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 631 transitions. [2021-11-13 17:31:36,161 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 631 transitions. Word has length 189 [2021-11-13 17:31:36,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:36,162 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 631 transitions. [2021-11-13 17:31:36,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:36,162 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 631 transitions. [2021-11-13 17:31:36,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:36,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:36,164 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:36,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 17:31:36,165 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:36,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:36,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1216386684, now seen corresponding path program 1 times [2021-11-13 17:31:36,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:36,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156203258] [2021-11-13 17:31:36,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:36,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:36,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:36,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:36,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:36,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:36,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:36,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:36,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156203258] [2021-11-13 17:31:36,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156203258] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:36,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:36,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:36,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984086162] [2021-11-13 17:31:36,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:36,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:36,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:36,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:36,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:36,337 INFO L87 Difference]: Start difference. First operand 407 states and 631 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:38,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:38,232 INFO L93 Difference]: Finished difference Result 959 states and 1507 transitions. [2021-11-13 17:31:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:38,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:38,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:38,238 INFO L225 Difference]: With dead ends: 959 [2021-11-13 17:31:38,238 INFO L226 Difference]: Without dead ends: 573 [2021-11-13 17:31:38,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:38,240 INFO L933 BasicCegarLoop]: 630 mSDtfsCounter, 1232 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1371.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.87ms SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1590.43ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:38,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1253 Valid, 1643 Invalid, 1519 Unknown, 0 Unchecked, 15.87ms Time], IncrementalHoareTripleChecker [87 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 1590.43ms Time] [2021-11-13 17:31:38,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-13 17:31:38,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 407. [2021-11-13 17:31:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.5471698113207548) internal successors, (574), 373 states have internal predecessors, (574), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 630 transitions. [2021-11-13 17:31:38,302 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 630 transitions. Word has length 189 [2021-11-13 17:31:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:38,302 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 630 transitions. [2021-11-13 17:31:38,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:38,303 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 630 transitions. [2021-11-13 17:31:38,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:38,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:38,304 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:38,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 17:31:38,305 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:38,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:38,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1184246726, now seen corresponding path program 1 times [2021-11-13 17:31:38,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:38,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561915306] [2021-11-13 17:31:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:38,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:38,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:38,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:38,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:38,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:38,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:38,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:38,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561915306] [2021-11-13 17:31:38,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561915306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:38,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:38,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:38,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449713876] [2021-11-13 17:31:38,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:38,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:38,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:38,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:38,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:38,476 INFO L87 Difference]: Start difference. First operand 407 states and 630 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:40,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:40,299 INFO L93 Difference]: Finished difference Result 958 states and 1502 transitions. [2021-11-13 17:31:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:40,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:40,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:40,302 INFO L225 Difference]: With dead ends: 958 [2021-11-13 17:31:40,302 INFO L226 Difference]: Without dead ends: 572 [2021-11-13 17:31:40,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:40,305 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 1176 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1336.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1197 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.27ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1527.06ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:40,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1197 Valid, 1670 Invalid, 1565 Unknown, 0 Unchecked, 14.27ms Time], IncrementalHoareTripleChecker [85 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 1527.06ms Time] [2021-11-13 17:31:40,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-13 17:31:40,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 407. [2021-11-13 17:31:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.5444743935309972) internal successors, (573), 373 states have internal predecessors, (573), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:40,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 629 transitions. [2021-11-13 17:31:40,381 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 629 transitions. Word has length 189 [2021-11-13 17:31:40,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:40,382 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 629 transitions. [2021-11-13 17:31:40,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 629 transitions. [2021-11-13 17:31:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:40,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:40,384 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:40,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 17:31:40,385 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:40,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:40,385 INFO L85 PathProgramCache]: Analyzing trace with hash 262334140, now seen corresponding path program 1 times [2021-11-13 17:31:40,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:40,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30434758] [2021-11-13 17:31:40,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:40,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:40,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:40,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:40,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:40,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:40,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:40,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:40,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30434758] [2021-11-13 17:31:40,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30434758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:40,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:40,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:40,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111221243] [2021-11-13 17:31:40,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:40,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:40,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:40,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:40,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:40,555 INFO L87 Difference]: Start difference. First operand 407 states and 629 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:42,318 INFO L93 Difference]: Finished difference Result 957 states and 1497 transitions. [2021-11-13 17:31:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:42,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:42,322 INFO L225 Difference]: With dead ends: 957 [2021-11-13 17:31:42,322 INFO L226 Difference]: Without dead ends: 571 [2021-11-13 17:31:42,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:42,324 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 1174 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1276.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.98ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1459.83ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:42,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1195 Valid, 1666 Invalid, 1553 Unknown, 0 Unchecked, 13.98ms Time], IncrementalHoareTripleChecker [85 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 1459.83ms Time] [2021-11-13 17:31:42,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-13 17:31:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 407. [2021-11-13 17:31:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.54177897574124) internal successors, (572), 373 states have internal predecessors, (572), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 628 transitions. [2021-11-13 17:31:42,387 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 628 transitions. Word has length 189 [2021-11-13 17:31:42,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:42,387 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 628 transitions. [2021-11-13 17:31:42,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 628 transitions. [2021-11-13 17:31:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:42,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:42,389 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:42,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 17:31:42,390 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:42,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:42,390 INFO L85 PathProgramCache]: Analyzing trace with hash -660833286, now seen corresponding path program 1 times [2021-11-13 17:31:42,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:42,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427145706] [2021-11-13 17:31:42,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:42,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:42,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:42,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:42,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:42,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:42,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:42,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:42,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427145706] [2021-11-13 17:31:42,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427145706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:42,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:42,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:42,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778314874] [2021-11-13 17:31:42,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:42,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:42,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:42,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:42,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:42,555 INFO L87 Difference]: Start difference. First operand 407 states and 628 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:44,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:44,442 INFO L93 Difference]: Finished difference Result 956 states and 1492 transitions. [2021-11-13 17:31:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:44,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:44,453 INFO L225 Difference]: With dead ends: 956 [2021-11-13 17:31:44,453 INFO L226 Difference]: Without dead ends: 570 [2021-11-13 17:31:44,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:44,455 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 1174 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1365.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.95ms SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1566.13ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:44,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1195 Valid, 1660 Invalid, 1541 Unknown, 0 Unchecked, 14.95ms Time], IncrementalHoareTripleChecker [88 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 1566.13ms Time] [2021-11-13 17:31:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-13 17:31:44,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 407. [2021-11-13 17:31:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 371 states have (on average 1.5390835579514826) internal successors, (571), 373 states have internal predecessors, (571), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-13 17:31:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 627 transitions. [2021-11-13 17:31:44,533 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 627 transitions. Word has length 189 [2021-11-13 17:31:44,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:44,534 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 627 transitions. [2021-11-13 17:31:44,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 627 transitions. [2021-11-13 17:31:44,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:44,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:44,536 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:44,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 17:31:44,537 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:44,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:44,537 INFO L85 PathProgramCache]: Analyzing trace with hash -274970884, now seen corresponding path program 1 times [2021-11-13 17:31:44,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:44,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801790955] [2021-11-13 17:31:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:44,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:44,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:44,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:44,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:44,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:44,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:44,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:44,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801790955] [2021-11-13 17:31:44,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801790955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:44,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:44,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:44,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273140659] [2021-11-13 17:31:44,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:44,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:44,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:44,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:44,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:44,724 INFO L87 Difference]: Start difference. First operand 407 states and 627 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:46,732 INFO L93 Difference]: Finished difference Result 1142 states and 1762 transitions. [2021-11-13 17:31:46,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:31:46,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:46,736 INFO L225 Difference]: With dead ends: 1142 [2021-11-13 17:31:46,736 INFO L226 Difference]: Without dead ends: 756 [2021-11-13 17:31:46,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:46,738 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 1753 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1368.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1773 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.45ms SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1595.82ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:46,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1773 Valid, 1429 Invalid, 1638 Unknown, 0 Unchecked, 13.45ms Time], IncrementalHoareTripleChecker [122 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 1595.82ms Time] [2021-11-13 17:31:46,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-11-13 17:31:46,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 510. [2021-11-13 17:31:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 471 states have (on average 1.505307855626327) internal successors, (709), 473 states have internal predecessors, (709), 30 states have call successors, (30), 9 states have call predecessors, (30), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-13 17:31:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 767 transitions. [2021-11-13 17:31:46,839 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 767 transitions. Word has length 189 [2021-11-13 17:31:46,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:46,840 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 767 transitions. [2021-11-13 17:31:46,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 767 transitions. [2021-11-13 17:31:46,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:46,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:46,859 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:46,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 17:31:46,860 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:46,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:46,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1804705055, now seen corresponding path program 1 times [2021-11-13 17:31:46,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:46,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922842351] [2021-11-13 17:31:46,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:46,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:46,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:46,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:47,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:47,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:47,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:47,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:47,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922842351] [2021-11-13 17:31:47,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922842351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:47,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:47,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:47,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318946874] [2021-11-13 17:31:47,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:47,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:47,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:47,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:47,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:47,032 INFO L87 Difference]: Start difference. First operand 510 states and 767 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:48,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:48,864 INFO L93 Difference]: Finished difference Result 1254 states and 1893 transitions. [2021-11-13 17:31:48,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:48,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:48,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:48,871 INFO L225 Difference]: With dead ends: 1254 [2021-11-13 17:31:48,871 INFO L226 Difference]: Without dead ends: 765 [2021-11-13 17:31:48,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:48,873 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 1165 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1268.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.10ms SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1476.93ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:48,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1186 Valid, 1645 Invalid, 1505 Unknown, 0 Unchecked, 13.10ms Time], IncrementalHoareTripleChecker [88 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 1476.93ms Time] [2021-11-13 17:31:48,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-11-13 17:31:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 510. [2021-11-13 17:31:48,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 471 states have (on average 1.5031847133757963) internal successors, (708), 473 states have internal predecessors, (708), 30 states have call successors, (30), 9 states have call predecessors, (30), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-13 17:31:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 766 transitions. [2021-11-13 17:31:48,985 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 766 transitions. Word has length 189 [2021-11-13 17:31:48,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:48,986 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 766 transitions. [2021-11-13 17:31:48,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:48,986 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 766 transitions. [2021-11-13 17:31:48,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:48,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:48,988 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:48,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 17:31:48,989 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:48,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:48,989 INFO L85 PathProgramCache]: Analyzing trace with hash 481526109, now seen corresponding path program 1 times [2021-11-13 17:31:48,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:48,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299649216] [2021-11-13 17:31:48,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:48,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:49,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:49,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:49,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:49,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:49,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:49,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:49,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299649216] [2021-11-13 17:31:49,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299649216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:49,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:49,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:49,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785101202] [2021-11-13 17:31:49,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:49,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:49,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:49,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:49,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:49,178 INFO L87 Difference]: Start difference. First operand 510 states and 766 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:50,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:50,957 INFO L93 Difference]: Finished difference Result 1253 states and 1888 transitions. [2021-11-13 17:31:50,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:50,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:50,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:50,961 INFO L225 Difference]: With dead ends: 1253 [2021-11-13 17:31:50,961 INFO L226 Difference]: Without dead ends: 764 [2021-11-13 17:31:50,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:50,963 INFO L933 BasicCegarLoop]: 629 mSDtfsCounter, 1163 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1226.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.00ms SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1409.69ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:50,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 1641 Invalid, 1493 Unknown, 0 Unchecked, 13.00ms Time], IncrementalHoareTripleChecker [88 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 1409.69ms Time] [2021-11-13 17:31:50,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-11-13 17:31:51,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 510. [2021-11-13 17:31:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 471 states have (on average 1.5010615711252655) internal successors, (707), 473 states have internal predecessors, (707), 30 states have call successors, (30), 9 states have call predecessors, (30), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-13 17:31:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 765 transitions. [2021-11-13 17:31:51,065 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 765 transitions. Word has length 189 [2021-11-13 17:31:51,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:51,065 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 765 transitions. [2021-11-13 17:31:51,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 765 transitions. [2021-11-13 17:31:51,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:51,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:51,068 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:51,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 17:31:51,068 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:51,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:51,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1916461729, now seen corresponding path program 1 times [2021-11-13 17:31:51,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:51,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4059816] [2021-11-13 17:31:51,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:51,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:51,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:51,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:51,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:51,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:51,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:51,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:51,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4059816] [2021-11-13 17:31:51,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4059816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:51,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:51,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:51,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625333265] [2021-11-13 17:31:51,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:51,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:51,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:51,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:51,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:51,225 INFO L87 Difference]: Start difference. First operand 510 states and 765 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:53,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:53,098 INFO L93 Difference]: Finished difference Result 1252 states and 1883 transitions. [2021-11-13 17:31:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:53,099 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:53,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:53,102 INFO L225 Difference]: With dead ends: 1252 [2021-11-13 17:31:53,102 INFO L226 Difference]: Without dead ends: 763 [2021-11-13 17:31:53,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:53,104 INFO L933 BasicCegarLoop]: 612 mSDtfsCounter, 1183 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1312.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.46ms SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1504.07ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:53,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1204 Valid, 1622 Invalid, 1455 Unknown, 0 Unchecked, 15.46ms Time], IncrementalHoareTripleChecker [90 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 1504.07ms Time] [2021-11-13 17:31:53,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-11-13 17:31:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 510. [2021-11-13 17:31:53,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 471 states have (on average 1.4989384288747345) internal successors, (706), 473 states have internal predecessors, (706), 30 states have call successors, (30), 9 states have call predecessors, (30), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-13 17:31:53,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 764 transitions. [2021-11-13 17:31:53,231 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 764 transitions. Word has length 189 [2021-11-13 17:31:53,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:53,232 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 764 transitions. [2021-11-13 17:31:53,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:53,232 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 764 transitions. [2021-11-13 17:31:53,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:53,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:53,235 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:53,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-13 17:31:53,237 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:53,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:53,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1578174179, now seen corresponding path program 1 times [2021-11-13 17:31:53,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:53,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869677808] [2021-11-13 17:31:53,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:53,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:53,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:53,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:53,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:53,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:53,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:53,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:53,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869677808] [2021-11-13 17:31:53,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869677808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:53,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:53,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:53,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212322529] [2021-11-13 17:31:53,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:53,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:53,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:53,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:53,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:53,409 INFO L87 Difference]: Start difference. First operand 510 states and 764 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:54,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:54,979 INFO L93 Difference]: Finished difference Result 1251 states and 1878 transitions. [2021-11-13 17:31:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:54,980 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:54,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:54,985 INFO L225 Difference]: With dead ends: 1251 [2021-11-13 17:31:54,985 INFO L226 Difference]: Without dead ends: 762 [2021-11-13 17:31:54,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:54,988 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 1337 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1044.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1358 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.64ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1208.42ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:54,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1358 Valid, 1421 Invalid, 1353 Unknown, 0 Unchecked, 11.64ms Time], IncrementalHoareTripleChecker [117 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 1208.42ms Time] [2021-11-13 17:31:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-11-13 17:31:55,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 510. [2021-11-13 17:31:55,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 471 states have (on average 1.4968152866242037) internal successors, (705), 473 states have internal predecessors, (705), 30 states have call successors, (30), 9 states have call predecessors, (30), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-13 17:31:55,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 763 transitions. [2021-11-13 17:31:55,081 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 763 transitions. Word has length 189 [2021-11-13 17:31:55,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:55,082 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 763 transitions. [2021-11-13 17:31:55,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 763 transitions. [2021-11-13 17:31:55,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:55,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:55,084 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:55,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-13 17:31:55,085 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:55,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1151619681, now seen corresponding path program 1 times [2021-11-13 17:31:55,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:55,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895499092] [2021-11-13 17:31:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:55,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:55,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:55,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:55,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:55,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:55,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:55,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:55,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895499092] [2021-11-13 17:31:55,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895499092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:55,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:55,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:31:55,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586200980] [2021-11-13 17:31:55,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:55,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:55,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:55,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:55,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:55,247 INFO L87 Difference]: Start difference. First operand 510 states and 763 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:56,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:56,910 INFO L93 Difference]: Finished difference Result 1250 states and 1873 transitions. [2021-11-13 17:31:56,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:31:56,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:31:56,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:56,914 INFO L225 Difference]: With dead ends: 1250 [2021-11-13 17:31:56,914 INFO L226 Difference]: Without dead ends: 761 [2021-11-13 17:31:56,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:31:56,916 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 1335 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1106.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.55ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1278.37ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:56,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 1417 Invalid, 1343 Unknown, 0 Unchecked, 12.55ms Time], IncrementalHoareTripleChecker [117 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 1278.37ms Time] [2021-11-13 17:31:56,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-11-13 17:31:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 510. [2021-11-13 17:31:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 471 states have (on average 1.494692144373673) internal successors, (704), 473 states have internal predecessors, (704), 30 states have call successors, (30), 9 states have call predecessors, (30), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-13 17:31:56,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 762 transitions. [2021-11-13 17:31:57,000 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 762 transitions. Word has length 189 [2021-11-13 17:31:57,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:57,000 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 762 transitions. [2021-11-13 17:31:57,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:31:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 762 transitions. [2021-11-13 17:31:57,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:31:57,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:57,003 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:57,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-13 17:31:57,003 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:57,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:57,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1692049187, now seen corresponding path program 1 times [2021-11-13 17:31:57,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:57,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318756493] [2021-11-13 17:31:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:57,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:57,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:31:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:57,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:31:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:57,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:31:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:57,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:31:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:57,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:31:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:31:57,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:57,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318756493] [2021-11-13 17:31:57,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318756493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:57,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:57,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 17:31:57,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104218448] [2021-11-13 17:31:57,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:57,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:31:57,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:57,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:31:57,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:31:57,205 INFO L87 Difference]: Start difference. First operand 510 states and 762 transitions. Second operand has 8 states, 8 states have (on average 22.25) internal successors, (178), 6 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:32:01,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:01,519 INFO L93 Difference]: Finished difference Result 1952 states and 2940 transitions. [2021-11-13 17:32:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 17:32:01,520 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.25) internal successors, (178), 6 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:32:01,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:01,527 INFO L225 Difference]: With dead ends: 1952 [2021-11-13 17:32:01,527 INFO L226 Difference]: Without dead ends: 1463 [2021-11-13 17:32:01,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-13 17:32:01,529 INFO L933 BasicCegarLoop]: 1045 mSDtfsCounter, 1867 mSDsluCounter, 2818 mSDsCounter, 0 mSdLazyCounter, 3227 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2780.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1901 SdHoareTripleChecker+Valid, 3863 SdHoareTripleChecker+Invalid, 3342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.67ms SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 3227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3245.44ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:01,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1901 Valid, 3863 Invalid, 3342 Unknown, 0 Unchecked, 38.67ms Time], IncrementalHoareTripleChecker [115 Valid, 3227 Invalid, 0 Unknown, 0 Unchecked, 3245.44ms Time] [2021-11-13 17:32:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-11-13 17:32:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 888. [2021-11-13 17:32:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 821 states have (on average 1.5018270401948843) internal successors, (1233), 824 states have internal predecessors, (1233), 51 states have call successors, (51), 15 states have call predecessors, (51), 15 states have return successors, (52), 50 states have call predecessors, (52), 49 states have call successors, (52) [2021-11-13 17:32:01,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1336 transitions. [2021-11-13 17:32:01,687 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1336 transitions. Word has length 189 [2021-11-13 17:32:01,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:01,687 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1336 transitions. [2021-11-13 17:32:01,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.25) internal successors, (178), 6 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:32:01,688 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1336 transitions. [2021-11-13 17:32:01,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:32:01,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:01,689 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:01,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-13 17:32:01,689 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:01,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:01,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1848029729, now seen corresponding path program 1 times [2021-11-13 17:32:01,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:01,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690200632] [2021-11-13 17:32:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:01,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:01,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:32:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:01,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:32:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:01,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:32:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:01,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:32:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:01,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:32:01,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:32:01,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:01,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690200632] [2021-11-13 17:32:01,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690200632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:01,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:32:01,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:32:01,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868003344] [2021-11-13 17:32:01,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:01,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:32:01,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:01,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:32:01,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:32:01,846 INFO L87 Difference]: Start difference. First operand 888 states and 1336 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:32:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:03,819 INFO L93 Difference]: Finished difference Result 2158 states and 3251 transitions. [2021-11-13 17:32:03,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:32:03,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:32:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:03,825 INFO L225 Difference]: With dead ends: 2158 [2021-11-13 17:32:03,825 INFO L226 Difference]: Without dead ends: 1291 [2021-11-13 17:32:03,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:32:03,827 INFO L933 BasicCegarLoop]: 606 mSDtfsCounter, 1157 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1270.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.52ms SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1468.51ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:03,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 1618 Invalid, 1428 Unknown, 0 Unchecked, 15.52ms Time], IncrementalHoareTripleChecker [92 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 1468.51ms Time] [2021-11-13 17:32:03,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-11-13 17:32:03,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 888. [2021-11-13 17:32:03,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 821 states have (on average 1.4993909866017052) internal successors, (1231), 824 states have internal predecessors, (1231), 51 states have call successors, (51), 15 states have call predecessors, (51), 15 states have return successors, (52), 50 states have call predecessors, (52), 49 states have call successors, (52) [2021-11-13 17:32:03,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1334 transitions. [2021-11-13 17:32:03,979 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1334 transitions. Word has length 189 [2021-11-13 17:32:03,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:03,979 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1334 transitions. [2021-11-13 17:32:03,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 5 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:32:03,980 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1334 transitions. [2021-11-13 17:32:03,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-13 17:32:03,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:03,982 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:03,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-13 17:32:03,982 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:03,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:03,983 INFO L85 PathProgramCache]: Analyzing trace with hash 659067745, now seen corresponding path program 1 times [2021-11-13 17:32:03,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:03,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534905265] [2021-11-13 17:32:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:03,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:04,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:32:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:04,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:32:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:04,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:32:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:04,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:32:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:04,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:32:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:32:04,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:04,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534905265] [2021-11-13 17:32:04,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534905265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:04,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:32:04,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 17:32:04,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156498914] [2021-11-13 17:32:04,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:04,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:32:04,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:04,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:32:04,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:32:04,190 INFO L87 Difference]: Start difference. First operand 888 states and 1334 transitions. Second operand has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 4 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:32:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:08,175 INFO L93 Difference]: Finished difference Result 3394 states and 5125 transitions. [2021-11-13 17:32:08,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:32:08,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 4 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 189 [2021-11-13 17:32:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:08,193 INFO L225 Difference]: With dead ends: 3394 [2021-11-13 17:32:08,194 INFO L226 Difference]: Without dead ends: 2528 [2021-11-13 17:32:08,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:32:08,198 INFO L933 BasicCegarLoop]: 1244 mSDtfsCounter, 2070 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 2370 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2577.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2116 SdHoareTripleChecker+Valid, 2605 SdHoareTripleChecker+Invalid, 2507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.42ms SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2954.59ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:08,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2116 Valid, 2605 Invalid, 2507 Unknown, 0 Unchecked, 34.42ms Time], IncrementalHoareTripleChecker [137 Valid, 2370 Invalid, 0 Unknown, 0 Unchecked, 2954.59ms Time] [2021-11-13 17:32:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-11-13 17:32:08,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1732. [2021-11-13 17:32:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1605 states have (on average 1.4903426791277259) internal successors, (2392), 1611 states have internal predecessors, (2392), 96 states have call successors, (96), 29 states have call predecessors, (96), 30 states have return successors, (99), 93 states have call predecessors, (99), 94 states have call successors, (99) [2021-11-13 17:32:08,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2587 transitions. [2021-11-13 17:32:08,575 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 2587 transitions. Word has length 189 [2021-11-13 17:32:08,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:08,576 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 2587 transitions. [2021-11-13 17:32:08,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.666666666666668) internal successors, (178), 4 states have internal predecessors, (178), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 17:32:08,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 2587 transitions. [2021-11-13 17:32:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-13 17:32:08,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:08,583 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:08,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-13 17:32:08,583 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:08,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:08,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1581301649, now seen corresponding path program 1 times [2021-11-13 17:32:08,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:08,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530147252] [2021-11-13 17:32:08,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:08,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:08,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:32:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:08,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:32:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:08,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:32:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:08,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:32:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:08,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:32:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:08,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-13 17:32:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:08,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:32:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:08,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2021-11-13 17:32:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 17:32:08,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:08,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530147252] [2021-11-13 17:32:08,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530147252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:32:08,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374827329] [2021-11-13 17:32:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:08,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:08,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:08,818 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:32:08,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:32:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:09,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:32:09,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:32:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-13 17:32:09,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:32:09,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374827329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:09,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:32:09,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 17:32:09,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614160282] [2021-11-13 17:32:09,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:09,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:32:09,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:09,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:32:09,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:09,793 INFO L87 Difference]: Start difference. First operand 1732 states and 2587 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:32:10,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:10,768 INFO L93 Difference]: Finished difference Result 5129 states and 7713 transitions. [2021-11-13 17:32:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:32:10,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 308 [2021-11-13 17:32:10,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:10,784 INFO L225 Difference]: With dead ends: 5129 [2021-11-13 17:32:10,784 INFO L226 Difference]: Without dead ends: 3419 [2021-11-13 17:32:10,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:10,789 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 511 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.26ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.19ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:10,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 1207 Invalid, 12 Unknown, 0 Unchecked, 3.26ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 9.19ms Time] [2021-11-13 17:32:10,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3419 states. [2021-11-13 17:32:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3419 to 3407. [2021-11-13 17:32:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3407 states, 3164 states have (on average 1.488305941845765) internal successors, (4709), 3174 states have internal predecessors, (4709), 182 states have call successors, (182), 57 states have call predecessors, (182), 60 states have return successors, (189), 177 states have call predecessors, (189), 180 states have call successors, (189) [2021-11-13 17:32:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 5080 transitions. [2021-11-13 17:32:11,484 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 5080 transitions. Word has length 308 [2021-11-13 17:32:11,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:11,485 INFO L470 AbstractCegarLoop]: Abstraction has 3407 states and 5080 transitions. [2021-11-13 17:32:11,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 2 states have internal predecessors, (241), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:32:11,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 5080 transitions. [2021-11-13 17:32:11,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-13 17:32:11,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:11,495 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:11,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:32:11,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-13 17:32:11,709 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:11,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:11,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1959633231, now seen corresponding path program 1 times [2021-11-13 17:32:11,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:11,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231621504] [2021-11-13 17:32:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:11,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:11,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:32:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:11,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:32:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:11,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:32:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:11,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:32:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:11,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:32:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:11,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-13 17:32:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:11,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:32:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:11,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2021-11-13 17:32:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 17:32:11,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:11,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231621504] [2021-11-13 17:32:11,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231621504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:32:11,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591388509] [2021-11-13 17:32:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:11,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:11,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:11,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:32:11,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:32:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:12,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 1295 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:32:12,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:32:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 17:32:12,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:32:12,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591388509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:12,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:32:12,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 17:32:12,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730750140] [2021-11-13 17:32:12,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:12,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:32:12,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:12,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:32:12,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:12,957 INFO L87 Difference]: Start difference. First operand 3407 states and 5080 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 2 states have internal predecessors, (253), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:32:14,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:14,166 INFO L93 Difference]: Finished difference Result 10132 states and 15218 transitions. [2021-11-13 17:32:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:32:14,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 2 states have internal predecessors, (253), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 308 [2021-11-13 17:32:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:14,202 INFO L225 Difference]: With dead ends: 10132 [2021-11-13 17:32:14,202 INFO L226 Difference]: Without dead ends: 6747 [2021-11-13 17:32:14,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:14,215 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 499 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.95ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.52ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:14,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 1207 Invalid, 12 Unknown, 0 Unchecked, 2.95ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 10.52ms Time] [2021-11-13 17:32:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6747 states. [2021-11-13 17:32:15,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6747 to 6727. [2021-11-13 17:32:15,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6727 states, 6256 states have (on average 1.48673273657289) internal successors, (9301), 6274 states have internal predecessors, (9301), 350 states have call successors, (350), 113 states have call predecessors, (350), 120 states have return successors, (365), 341 states have call predecessors, (365), 348 states have call successors, (365) [2021-11-13 17:32:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 10016 transitions. [2021-11-13 17:32:15,757 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 10016 transitions. Word has length 308 [2021-11-13 17:32:15,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:15,758 INFO L470 AbstractCegarLoop]: Abstraction has 6727 states and 10016 transitions. [2021-11-13 17:32:15,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 2 states have internal predecessors, (253), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:32:15,758 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 10016 transitions. [2021-11-13 17:32:15,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-13 17:32:15,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:15,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:15,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-13 17:32:16,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:16,001 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:16,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:16,002 INFO L85 PathProgramCache]: Analyzing trace with hash 390180305, now seen corresponding path program 1 times [2021-11-13 17:32:16,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:16,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013290792] [2021-11-13 17:32:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:16,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:16,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:32:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:16,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:32:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:16,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:32:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:16,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:32:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:16,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:32:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:16,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-13 17:32:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:16,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:32:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:16,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2021-11-13 17:32:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 17:32:16,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:16,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013290792] [2021-11-13 17:32:16,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013290792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:32:16,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101795986] [2021-11-13 17:32:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:16,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:16,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:16,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:32:16,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:32:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:16,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:32:16,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:32:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-13 17:32:17,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:32:17,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101795986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:17,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:32:17,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 17:32:17,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066485498] [2021-11-13 17:32:17,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:17,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:32:17,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:17,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:32:17,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:17,200 INFO L87 Difference]: Start difference. First operand 6727 states and 10016 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:32:19,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:19,355 INFO L93 Difference]: Finished difference Result 20048 states and 30074 transitions. [2021-11-13 17:32:19,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:32:19,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 308 [2021-11-13 17:32:19,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:19,406 INFO L225 Difference]: With dead ends: 20048 [2021-11-13 17:32:19,406 INFO L226 Difference]: Without dead ends: 13343 [2021-11-13 17:32:19,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:19,432 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 535 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.62ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.97ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:19,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 1207 Invalid, 12 Unknown, 0 Unchecked, 2.62ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 8.97ms Time] [2021-11-13 17:32:19,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13343 states. [2021-11-13 17:32:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13343 to 13307. [2021-11-13 17:32:22,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13307 states, 12388 states have (on average 1.4853890862124637) internal successors, (18401), 12422 states have internal predecessors, (18401), 678 states have call successors, (678), 225 states have call predecessors, (678), 240 states have return successors, (709), 661 states have call predecessors, (709), 676 states have call successors, (709) [2021-11-13 17:32:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13307 states to 13307 states and 19788 transitions. [2021-11-13 17:32:22,144 INFO L78 Accepts]: Start accepts. Automaton has 13307 states and 19788 transitions. Word has length 308 [2021-11-13 17:32:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:22,144 INFO L470 AbstractCegarLoop]: Abstraction has 13307 states and 19788 transitions. [2021-11-13 17:32:22,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:32:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 13307 states and 19788 transitions. [2021-11-13 17:32:22,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-13 17:32:22,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:22,169 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:22,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:32:22,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-13 17:32:22,385 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:22,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:22,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1192226033, now seen corresponding path program 1 times [2021-11-13 17:32:22,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:22,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929723304] [2021-11-13 17:32:22,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:22,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:22,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:32:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:22,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:32:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:22,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:32:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:22,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:32:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:22,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:32:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:22,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-13 17:32:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:22,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:32:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:22,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2021-11-13 17:32:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 17:32:22,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:22,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929723304] [2021-11-13 17:32:22,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929723304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:32:22,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473230735] [2021-11-13 17:32:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:22,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:22,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:22,642 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:32:22,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:32:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:22,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:32:22,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:32:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 17:32:23,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:32:23,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473230735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:23,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:32:23,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 17:32:23,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847889087] [2021-11-13 17:32:23,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:23,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:32:23,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:23,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:32:23,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:23,704 INFO L87 Difference]: Start difference. First operand 13307 states and 19788 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 2 states have internal predecessors, (271), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:32:28,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:28,840 INFO L93 Difference]: Finished difference Result 39700 states and 59478 transitions. [2021-11-13 17:32:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:32:28,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 2 states have internal predecessors, (271), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 308 [2021-11-13 17:32:28,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:28,933 INFO L225 Difference]: With dead ends: 39700 [2021-11-13 17:32:28,933 INFO L226 Difference]: Without dead ends: 26415 [2021-11-13 17:32:28,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:28,974 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 481 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.94ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.59ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:28,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 1207 Invalid, 12 Unknown, 0 Unchecked, 2.94ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 9.59ms Time] [2021-11-13 17:32:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26415 states. [2021-11-13 17:32:34,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26415 to 26347. [2021-11-13 17:32:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26347 states, 24548 states have (on average 1.484153495193091) internal successors, (36433), 24614 states have internal predecessors, (36433), 1318 states have call successors, (1318), 449 states have call predecessors, (1318), 480 states have return successors, (1381), 1285 states have call predecessors, (1381), 1316 states have call successors, (1381) [2021-11-13 17:32:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26347 states to 26347 states and 39132 transitions. [2021-11-13 17:32:34,791 INFO L78 Accepts]: Start accepts. Automaton has 26347 states and 39132 transitions. Word has length 308 [2021-11-13 17:32:34,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:34,791 INFO L470 AbstractCegarLoop]: Abstraction has 26347 states and 39132 transitions. [2021-11-13 17:32:34,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 2 states have internal predecessors, (271), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:32:34,792 INFO L276 IsEmpty]: Start isEmpty. Operand 26347 states and 39132 transitions. [2021-11-13 17:32:34,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-13 17:32:34,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:34,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:34,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:32:35,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:35,050 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:35,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:35,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1010484241, now seen corresponding path program 1 times [2021-11-13 17:32:35,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:35,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074344274] [2021-11-13 17:32:35,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:35,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:35,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:32:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:35,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:32:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:35,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:32:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:35,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:32:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:35,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:32:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:35,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-13 17:32:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:35,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:32:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:35,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2021-11-13 17:32:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 17:32:35,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:35,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074344274] [2021-11-13 17:32:35,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074344274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:32:35,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632808484] [2021-11-13 17:32:35,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:35,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:35,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:35,332 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:32:35,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:32:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:35,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 1277 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:32:35,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:32:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 17:32:36,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:32:36,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632808484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:36,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:32:36,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 17:32:36,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371528766] [2021-11-13 17:32:36,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:36,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:32:36,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:36,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:32:36,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:36,304 INFO L87 Difference]: Start difference. First operand 26347 states and 39132 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 2 states have internal predecessors, (265), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:32:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:32:47,016 INFO L93 Difference]: Finished difference Result 78644 states and 117670 transitions. [2021-11-13 17:32:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:32:47,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 2 states have internal predecessors, (265), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 308 [2021-11-13 17:32:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:32:47,243 INFO L225 Difference]: With dead ends: 78644 [2021-11-13 17:32:47,243 INFO L226 Difference]: Without dead ends: 52319 [2021-11-13 17:32:47,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:47,317 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 487 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.09ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.01ms IncrementalHoareTripleChecker+Time [2021-11-13 17:32:47,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 1207 Invalid, 12 Unknown, 0 Unchecked, 3.09ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 10.01ms Time] [2021-11-13 17:32:47,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52319 states. [2021-11-13 17:32:58,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52319 to 52187. [2021-11-13 17:32:58,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52187 states, 48660 states have (on average 1.482963419646527) internal successors, (72161), 48790 states have internal predecessors, (72161), 2566 states have call successors, (2566), 897 states have call predecessors, (2566), 960 states have return successors, (2693), 2501 states have call predecessors, (2693), 2564 states have call successors, (2693) [2021-11-13 17:32:58,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52187 states to 52187 states and 77420 transitions. [2021-11-13 17:32:58,462 INFO L78 Accepts]: Start accepts. Automaton has 52187 states and 77420 transitions. Word has length 308 [2021-11-13 17:32:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:32:58,463 INFO L470 AbstractCegarLoop]: Abstraction has 52187 states and 77420 transitions. [2021-11-13 17:32:58,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 2 states have internal predecessors, (265), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 17:32:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 52187 states and 77420 transitions. [2021-11-13 17:32:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-13 17:32:58,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:32:58,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:32:58,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:32:58,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:58,733 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:32:58,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:32:58,734 INFO L85 PathProgramCache]: Analyzing trace with hash 577749809, now seen corresponding path program 1 times [2021-11-13 17:32:58,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:32:58,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74848172] [2021-11-13 17:32:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:58,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:32:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:58,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 17:32:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:58,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-13 17:32:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:58,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 17:32:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:58,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-13 17:32:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:58,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-11-13 17:32:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:58,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-13 17:32:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:58,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:32:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:58,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2021-11-13 17:32:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 17:32:59,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:32:59,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74848172] [2021-11-13 17:32:59,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74848172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:32:59,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650520384] [2021-11-13 17:32:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:32:59,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:32:59,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:32:59,005 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:32:59,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d53f8c96-e99e-4e46-a28d-611d4ff3f6ee/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:32:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:32:59,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 17:32:59,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:32:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 17:32:59,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:32:59,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650520384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:32:59,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:32:59,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 17:32:59,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005487251] [2021-11-13 17:32:59,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:32:59,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:32:59,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:32:59,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:32:59,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:32:59,769 INFO L87 Difference]: Start difference. First operand 52187 states and 77420 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)