./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product33.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0 --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 7d58750164873693a8e41f270259eb299f067753793be4bdf6f5449bb7376f85 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:31:00,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:31:00,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:31:00,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:31:00,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:31:00,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:31:00,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:31:00,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:31:00,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:31:00,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:31:00,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:31:00,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:31:00,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:31:00,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:31:00,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:31:00,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:31:00,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:31:00,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:31:00,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:31:00,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:31:00,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:31:00,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:31:00,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:31:00,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:31:00,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:31:00,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:31:00,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:31:00,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:31:00,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:31:00,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:31:00,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:31:00,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:31:00,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:31:00,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:31:00,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:31:00,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:31:00,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:31:00,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:31:00,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:31:00,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:31:00,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:31:00,616 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:31:00,643 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:31:00,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:31:00,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:31:00,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:31:00,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:31:00,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:31:00,646 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:31:00,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:31:00,647 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:31:00,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:31:00,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:31:00,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:31:00,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:31:00,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:31:00,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:31:00,650 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:31:00,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:31:00,650 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:31:00,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:31:00,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:31:00,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:31:00,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:31:00,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:31:00,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:31:00,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:31:00,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:31:00,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:31:00,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:31:00,653 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:31:00,653 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:31:00,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:31:00,654 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:31:00,654 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_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d58750164873693a8e41f270259eb299f067753793be4bdf6f5449bb7376f85 [2021-11-22 14:31:00,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:31:00,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:31:00,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:31:00,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:31:00,901 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:31:00,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/product-lines/email_spec4_product33.cil.c [2021-11-22 14:31:00,958 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/data/9af6c6ee0/31aa2b87b33042d8a4ea71966c982eef/FLAG470051a43 [2021-11-22 14:31:01,624 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:31:01,627 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c [2021-11-22 14:31:01,648 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/data/9af6c6ee0/31aa2b87b33042d8a4ea71966c982eef/FLAG470051a43 [2021-11-22 14:31:01,829 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/data/9af6c6ee0/31aa2b87b33042d8a4ea71966c982eef [2021-11-22 14:31:01,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:31:01,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:31:01,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:31:01,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:31:01,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:31:01,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:31:01" (1/1) ... [2021-11-22 14:31:01,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fcff565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:01, skipping insertion in model container [2021-11-22 14:31:01,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:31:01" (1/1) ... [2021-11-22 14:31:01,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:31:01,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:31:02,281 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c[11229,11242] [2021-11-22 14:31:02,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:31:02,674 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:31:02,712 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c[11229,11242] [2021-11-22 14:31:02,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:31:02,863 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:31:02,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:02 WrapperNode [2021-11-22 14:31:02,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:31:02,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:31:02,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:31:02,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:31:02,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:02" (1/1) ... [2021-11-22 14:31:02,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:02" (1/1) ... [2021-11-22 14:31:03,082 INFO L137 Inliner]: procedures = 134, calls = 228, calls flagged for inlining = 137, calls inlined = 201, statements flattened = 3064 [2021-11-22 14:31:03,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:31:03,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:31:03,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:31:03,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:31:03,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:02" (1/1) ... [2021-11-22 14:31:03,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:02" (1/1) ... [2021-11-22 14:31:03,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:02" (1/1) ... [2021-11-22 14:31:03,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:02" (1/1) ... [2021-11-22 14:31:03,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:02" (1/1) ... [2021-11-22 14:31:03,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:02" (1/1) ... [2021-11-22 14:31:03,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:02" (1/1) ... [2021-11-22 14:31:03,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:31:03,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:31:03,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:31:03,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:31:03,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:02" (1/1) ... [2021-11-22 14:31:03,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:31:03,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:31:03,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:31:03,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:31:03,276 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-22 14:31:03,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:31:03,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:31:03,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:31:03,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:31:03,540 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:31:03,542 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:31:04,971 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:31:04,992 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:31:04,994 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-22 14:31:04,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:31:04 BoogieIcfgContainer [2021-11-22 14:31:04,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:31:05,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:31:05,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:31:05,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:31:05,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:31:01" (1/3) ... [2021-11-22 14:31:05,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fdf5951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:31:05, skipping insertion in model container [2021-11-22 14:31:05,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:02" (2/3) ... [2021-11-22 14:31:05,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fdf5951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:31:05, skipping insertion in model container [2021-11-22 14:31:05,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:31:04" (3/3) ... [2021-11-22 14:31:05,007 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product33.cil.c [2021-11-22 14:31:05,012 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:31:05,012 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-22 14:31:05,061 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:31:05,068 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 [2021-11-22 14:31:05,068 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-22 14:31:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 649 states, 646 states have (on average 1.673374613003096) internal successors, (1081), 648 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:05,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 14:31:05,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:05,113 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] [2021-11-22 14:31:05,114 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:05,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:05,119 INFO L85 PathProgramCache]: Analyzing trace with hash 2041861686, now seen corresponding path program 1 times [2021-11-22 14:31:05,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:05,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515150298] [2021-11-22 14:31:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:05,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:05,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:05,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515150298] [2021-11-22 14:31:05,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515150298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:05,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:05,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:05,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613430714] [2021-11-22 14:31:05,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:05,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:05,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:05,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:05,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:05,532 INFO L87 Difference]: Start difference. First operand has 649 states, 646 states have (on average 1.673374613003096) internal successors, (1081), 648 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:05,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:05,711 INFO L93 Difference]: Finished difference Result 1902 states and 3175 transitions. [2021-11-22 14:31:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:05,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-22 14:31:05,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:05,735 INFO L225 Difference]: With dead ends: 1902 [2021-11-22 14:31:05,735 INFO L226 Difference]: Without dead ends: 997 [2021-11-22 14:31:05,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:05,746 INFO L933 BasicCegarLoop]: 2109 mSDtfsCounter, 1050 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 3154 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:05,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 3154 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:05,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-11-22 14:31:05,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 509. [2021-11-22 14:31:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 507 states have (on average 1.6844181459566074) internal successors, (854), 508 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 854 transitions. [2021-11-22 14:31:05,882 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 854 transitions. Word has length 54 [2021-11-22 14:31:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:05,883 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 854 transitions. [2021-11-22 14:31:05,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:05,883 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 854 transitions. [2021-11-22 14:31:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-22 14:31:05,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:05,894 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] [2021-11-22 14:31:05,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:31:05,895 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:05,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:05,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1829251417, now seen corresponding path program 1 times [2021-11-22 14:31:05,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:05,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373487139] [2021-11-22 14:31:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:05,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:06,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:06,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373487139] [2021-11-22 14:31:06,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373487139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:06,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:06,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:31:06,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145674854] [2021-11-22 14:31:06,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:06,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:31:06,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:06,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:31:06,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:31:06,056 INFO L87 Difference]: Start difference. First operand 509 states and 854 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:06,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:06,297 INFO L93 Difference]: Finished difference Result 1468 states and 2470 transitions. [2021-11-22 14:31:06,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:31:06,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-22 14:31:06,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:06,308 INFO L225 Difference]: With dead ends: 1468 [2021-11-22 14:31:06,308 INFO L226 Difference]: Without dead ends: 982 [2021-11-22 14:31:06,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:31:06,318 INFO L933 BasicCegarLoop]: 1616 mSDtfsCounter, 1662 mSDsluCounter, 2416 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1662 SdHoareTripleChecker+Valid, 4032 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:06,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1662 Valid, 4032 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:31:06,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-11-22 14:31:06,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 509. [2021-11-22 14:31:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 507 states have (on average 1.6824457593688362) internal successors, (853), 508 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 853 transitions. [2021-11-22 14:31:06,388 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 853 transitions. Word has length 56 [2021-11-22 14:31:06,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:06,390 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 853 transitions. [2021-11-22 14:31:06,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:06,391 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 853 transitions. [2021-11-22 14:31:06,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-22 14:31:06,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:06,396 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] [2021-11-22 14:31:06,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:31:06,400 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:06,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:06,402 INFO L85 PathProgramCache]: Analyzing trace with hash -525255188, now seen corresponding path program 1 times [2021-11-22 14:31:06,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:06,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270486596] [2021-11-22 14:31:06,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:06,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:06,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:06,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270486596] [2021-11-22 14:31:06,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270486596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:06,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:06,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:06,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633527662] [2021-11-22 14:31:06,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:06,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:06,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:06,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:06,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:06,513 INFO L87 Difference]: Start difference. First operand 509 states and 853 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:06,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:06,566 INFO L93 Difference]: Finished difference Result 997 states and 1677 transitions. [2021-11-22 14:31:06,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:06,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-22 14:31:06,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:06,570 INFO L225 Difference]: With dead ends: 997 [2021-11-22 14:31:06,571 INFO L226 Difference]: Without dead ends: 516 [2021-11-22 14:31:06,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:06,580 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 826 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:06,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 879 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:06,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-11-22 14:31:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 509. [2021-11-22 14:31:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 507 states have (on average 1.6765285996055226) internal successors, (850), 508 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 850 transitions. [2021-11-22 14:31:06,613 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 850 transitions. Word has length 57 [2021-11-22 14:31:06,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:06,614 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 850 transitions. [2021-11-22 14:31:06,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:06,614 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 850 transitions. [2021-11-22 14:31:06,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-22 14:31:06,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:06,616 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] [2021-11-22 14:31:06,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 14:31:06,617 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:06,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:06,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1953577583, now seen corresponding path program 1 times [2021-11-22 14:31:06,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:06,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676412646] [2021-11-22 14:31:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:06,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:06,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:06,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676412646] [2021-11-22 14:31:06,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676412646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:06,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:06,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:31:06,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575859780] [2021-11-22 14:31:06,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:06,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:31:06,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:06,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:31:06,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:31:06,730 INFO L87 Difference]: Start difference. First operand 509 states and 850 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:06,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:06,919 INFO L93 Difference]: Finished difference Result 1455 states and 2447 transitions. [2021-11-22 14:31:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:31:06,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-22 14:31:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:06,926 INFO L225 Difference]: With dead ends: 1455 [2021-11-22 14:31:06,927 INFO L226 Difference]: Without dead ends: 979 [2021-11-22 14:31:06,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:31:06,935 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 4001 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4001 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:06,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4001 Valid, 1681 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:31:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-11-22 14:31:06,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 509. [2021-11-22 14:31:06,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 507 states have (on average 1.6745562130177514) internal successors, (849), 508 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 849 transitions. [2021-11-22 14:31:06,971 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 849 transitions. Word has length 59 [2021-11-22 14:31:06,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:06,973 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 849 transitions. [2021-11-22 14:31:06,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:06,973 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 849 transitions. [2021-11-22 14:31:06,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-22 14:31:06,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:06,976 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] [2021-11-22 14:31:06,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 14:31:06,977 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:06,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:06,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1108044802, now seen corresponding path program 1 times [2021-11-22 14:31:06,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:06,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457882908] [2021-11-22 14:31:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:06,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:07,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:07,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457882908] [2021-11-22 14:31:07,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457882908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:07,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:07,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:31:07,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414128661] [2021-11-22 14:31:07,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:07,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:31:07,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:07,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:31:07,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:31:07,077 INFO L87 Difference]: Start difference. First operand 509 states and 849 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:07,242 INFO L93 Difference]: Finished difference Result 1462 states and 2453 transitions. [2021-11-22 14:31:07,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:31:07,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-22 14:31:07,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:07,249 INFO L225 Difference]: With dead ends: 1462 [2021-11-22 14:31:07,249 INFO L226 Difference]: Without dead ends: 986 [2021-11-22 14:31:07,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:31:07,251 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 4005 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4005 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:07,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4005 Valid, 1684 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:31:07,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-11-22 14:31:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 509. [2021-11-22 14:31:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 507 states have (on average 1.6725838264299804) internal successors, (848), 508 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 848 transitions. [2021-11-22 14:31:07,294 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 848 transitions. Word has length 60 [2021-11-22 14:31:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:07,294 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 848 transitions. [2021-11-22 14:31:07,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,299 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 848 transitions. [2021-11-22 14:31:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-22 14:31:07,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:07,300 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] [2021-11-22 14:31:07,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 14:31:07,301 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:07,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1933416372, now seen corresponding path program 1 times [2021-11-22 14:31:07,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:07,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895370590] [2021-11-22 14:31:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:07,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:07,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:07,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895370590] [2021-11-22 14:31:07,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895370590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:07,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:07,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:07,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395678436] [2021-11-22 14:31:07,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:07,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:07,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:07,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:07,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:07,383 INFO L87 Difference]: Start difference. First operand 509 states and 848 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:07,425 INFO L93 Difference]: Finished difference Result 758 states and 1247 transitions. [2021-11-22 14:31:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:07,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-22 14:31:07,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:07,429 INFO L225 Difference]: With dead ends: 758 [2021-11-22 14:31:07,429 INFO L226 Difference]: Without dead ends: 512 [2021-11-22 14:31:07,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:07,431 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 1 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:07,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1690 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-22 14:31:07,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 511. [2021-11-22 14:31:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 509 states have (on average 1.6699410609037328) internal successors, (850), 510 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 850 transitions. [2021-11-22 14:31:07,468 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 850 transitions. Word has length 61 [2021-11-22 14:31:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:07,471 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 850 transitions. [2021-11-22 14:31:07,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,471 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 850 transitions. [2021-11-22 14:31:07,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-22 14:31:07,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:07,484 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 14:31:07,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 14:31:07,484 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:07,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1970782319, now seen corresponding path program 1 times [2021-11-22 14:31:07,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:07,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082058054] [2021-11-22 14:31:07,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:07,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:07,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:07,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082058054] [2021-11-22 14:31:07,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082058054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:07,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:07,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:07,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405413617] [2021-11-22 14:31:07,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:07,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:07,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:07,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:07,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:07,533 INFO L87 Difference]: Start difference. First operand 511 states and 850 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:07,599 INFO L93 Difference]: Finished difference Result 1405 states and 2360 transitions. [2021-11-22 14:31:07,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:07,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-22 14:31:07,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:07,606 INFO L225 Difference]: With dead ends: 1405 [2021-11-22 14:31:07,606 INFO L226 Difference]: Without dead ends: 932 [2021-11-22 14:31:07,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:07,608 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 798 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:07,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 1596 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:07,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-11-22 14:31:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 686. [2021-11-22 14:31:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 684 states have (on average 1.6973684210526316) internal successors, (1161), 685 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1161 transitions. [2021-11-22 14:31:07,656 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1161 transitions. Word has length 70 [2021-11-22 14:31:07,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:07,656 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 1161 transitions. [2021-11-22 14:31:07,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,656 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1161 transitions. [2021-11-22 14:31:07,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-22 14:31:07,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:07,658 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 14:31:07,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 14:31:07,658 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:07,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:07,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1205770079, now seen corresponding path program 1 times [2021-11-22 14:31:07,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:07,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222729152] [2021-11-22 14:31:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:07,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:07,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:07,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222729152] [2021-11-22 14:31:07,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222729152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:07,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:07,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:31:07,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642511939] [2021-11-22 14:31:07,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:07,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:31:07,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:07,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:31:07,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:31:07,718 INFO L87 Difference]: Start difference. First operand 686 states and 1161 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:07,908 INFO L93 Difference]: Finished difference Result 1972 states and 3373 transitions. [2021-11-22 14:31:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:31:07,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-22 14:31:07,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:07,918 INFO L225 Difference]: With dead ends: 1972 [2021-11-22 14:31:07,918 INFO L226 Difference]: Without dead ends: 1324 [2021-11-22 14:31:07,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:31:07,920 INFO L933 BasicCegarLoop]: 1619 mSDtfsCounter, 1631 mSDsluCounter, 2428 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 4047 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:07,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1631 Valid, 4047 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:31:07,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-11-22 14:31:07,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 686. [2021-11-22 14:31:07,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 684 states have (on average 1.6944444444444444) internal successors, (1159), 685 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1159 transitions. [2021-11-22 14:31:07,990 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1159 transitions. Word has length 71 [2021-11-22 14:31:07,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:07,991 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 1159 transitions. [2021-11-22 14:31:07,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,991 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1159 transitions. [2021-11-22 14:31:07,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-22 14:31:07,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:07,993 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 14:31:07,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 14:31:07,993 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:07,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:07,994 INFO L85 PathProgramCache]: Analyzing trace with hash 28693350, now seen corresponding path program 1 times [2021-11-22 14:31:07,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:07,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908552459] [2021-11-22 14:31:07,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:07,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:08,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:08,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908552459] [2021-11-22 14:31:08,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908552459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:08,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:08,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:08,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600589704] [2021-11-22 14:31:08,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:08,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:08,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:08,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:08,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:08,045 INFO L87 Difference]: Start difference. First operand 686 states and 1159 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:08,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:08,174 INFO L93 Difference]: Finished difference Result 1970 states and 3365 transitions. [2021-11-22 14:31:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:08,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-22 14:31:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:08,184 INFO L225 Difference]: With dead ends: 1970 [2021-11-22 14:31:08,184 INFO L226 Difference]: Without dead ends: 1322 [2021-11-22 14:31:08,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:08,194 INFO L933 BasicCegarLoop]: 1242 mSDtfsCounter, 795 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 2077 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:08,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 2077 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:08,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2021-11-22 14:31:08,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1076. [2021-11-22 14:31:08,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1074 states have (on average 1.728119180633147) internal successors, (1856), 1075 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1856 transitions. [2021-11-22 14:31:08,282 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1856 transitions. Word has length 72 [2021-11-22 14:31:08,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:08,282 INFO L470 AbstractCegarLoop]: Abstraction has 1076 states and 1856 transitions. [2021-11-22 14:31:08,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:08,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1856 transitions. [2021-11-22 14:31:08,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-22 14:31:08,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:08,285 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-22 14:31:08,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 14:31:08,286 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:08,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:08,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1224894661, now seen corresponding path program 1 times [2021-11-22 14:31:08,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:08,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72716993] [2021-11-22 14:31:08,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:08,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:08,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:08,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72716993] [2021-11-22 14:31:08,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72716993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:31:08,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494313383] [2021-11-22 14:31:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:08,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:31:08,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:31:08,358 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:31:08,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:31:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:08,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 14:31:08,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:08,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:31:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:08,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494313383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:31:08,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:31:08,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 14:31:08,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099008925] [2021-11-22 14:31:08,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:31:08,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:31:08,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:08,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:31:08,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:31:08,984 INFO L87 Difference]: Start difference. First operand 1076 states and 1856 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:09,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:09,330 INFO L93 Difference]: Finished difference Result 3708 states and 6376 transitions. [2021-11-22 14:31:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:31:09,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-22 14:31:09,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:09,353 INFO L225 Difference]: With dead ends: 3708 [2021-11-22 14:31:09,353 INFO L226 Difference]: Without dead ends: 3462 [2021-11-22 14:31:09,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:31:09,355 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 3968 mSDsluCounter, 4081 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3968 SdHoareTripleChecker+Valid, 4926 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:09,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3968 Valid, 4926 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2021-11-22 14:31:09,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 2724. [2021-11-22 14:31:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2722 states have (on average 1.7578986039676707) internal successors, (4785), 2723 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 4785 transitions. [2021-11-22 14:31:09,576 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 4785 transitions. Word has length 72 [2021-11-22 14:31:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:09,577 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 4785 transitions. [2021-11-22 14:31:09,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 4785 transitions. [2021-11-22 14:31:09,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-22 14:31:09,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:09,581 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] [2021-11-22 14:31:09,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:09,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a97e77d2-a527-46ab-9d9a-69389eadd10c/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:31:09,804 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:09,804 INFO L85 PathProgramCache]: Analyzing trace with hash -490173197, now seen corresponding path program 1 times [2021-11-22 14:31:09,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:09,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374699700] [2021-11-22 14:31:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:09,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:09,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:09,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374699700] [2021-11-22 14:31:09,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374699700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:09,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:09,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:09,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853276488] [2021-11-22 14:31:09,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:09,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:09,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:09,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:09,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:09,849 INFO L87 Difference]: Start difference. First operand 2724 states and 4785 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:10,129 INFO L93 Difference]: Finished difference Result 7096 states and 12493 transitions. [2021-11-22 14:31:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:10,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-22 14:31:10,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:10,158 INFO L225 Difference]: With dead ends: 7096 [2021-11-22 14:31:10,158 INFO L226 Difference]: Without dead ends: 4572 [2021-11-22 14:31:10,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:10,163 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 793 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:10,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 1681 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4572 states. [2021-11-22 14:31:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4572 to 4326. [2021-11-22 14:31:10,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4324 states have (on average 1.7641073080481036) internal successors, (7628), 4325 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 7628 transitions. [2021-11-22 14:31:10,477 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 7628 transitions. Word has length 75 [2021-11-22 14:31:10,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:10,478 INFO L470 AbstractCegarLoop]: Abstraction has 4326 states and 7628 transitions. [2021-11-22 14:31:10,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 7628 transitions. [2021-11-22 14:31:10,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-22 14:31:10,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:10,484 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] [2021-11-22 14:31:10,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 14:31:10,484 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:10,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1934288859, now seen corresponding path program 1 times [2021-11-22 14:31:10,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:10,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802657701] [2021-11-22 14:31:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:10,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:10,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:10,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802657701] [2021-11-22 14:31:10,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802657701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:10,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:10,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:10,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123533728] [2021-11-22 14:31:10,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:10,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:10,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:10,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:10,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:10,566 INFO L87 Difference]: Start difference. First operand 4326 states and 7628 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:10,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:10,980 INFO L93 Difference]: Finished difference Result 10560 states and 18620 transitions. [2021-11-22 14:31:10,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:10,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-22 14:31:10,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:11,023 INFO L225 Difference]: With dead ends: 10560 [2021-11-22 14:31:11,023 INFO L226 Difference]: Without dead ends: 6801 [2021-11-22 14:31:11,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:11,029 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 791 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:11,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 1632 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6801 states. [2021-11-22 14:31:11,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6801 to 6555. [2021-11-22 14:31:11,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6555 states, 6553 states have (on average 1.7633145124370517) internal successors, (11555), 6554 states have internal predecessors, (11555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6555 states to 6555 states and 11555 transitions. [2021-11-22 14:31:11,555 INFO L78 Accepts]: Start accepts. Automaton has 6555 states and 11555 transitions. Word has length 76 [2021-11-22 14:31:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:11,555 INFO L470 AbstractCegarLoop]: Abstraction has 6555 states and 11555 transitions. [2021-11-22 14:31:11,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:11,556 INFO L276 IsEmpty]: Start isEmpty. Operand 6555 states and 11555 transitions. [2021-11-22 14:31:11,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-22 14:31:11,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:11,566 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] [2021-11-22 14:31:11,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 14:31:11,567 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:11,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:11,567 INFO L85 PathProgramCache]: Analyzing trace with hash -230935551, now seen corresponding path program 1 times [2021-11-22 14:31:11,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:11,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977914896] [2021-11-22 14:31:11,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:11,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:11,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:11,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977914896] [2021-11-22 14:31:11,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977914896] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:11,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:11,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:11,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424700698] [2021-11-22 14:31:11,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:11,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:11,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:11,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:11,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:11,636 INFO L87 Difference]: Start difference. First operand 6555 states and 11555 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:12,258 INFO L93 Difference]: Finished difference Result 15648 states and 27573 transitions. [2021-11-22 14:31:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:12,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-22 14:31:12,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:12,309 INFO L225 Difference]: With dead ends: 15648 [2021-11-22 14:31:12,309 INFO L226 Difference]: Without dead ends: 10249 [2021-11-22 14:31:12,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:12,320 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 789 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:12,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 1632 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:12,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10249 states. [2021-11-22 14:31:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10249 to 10003. [2021-11-22 14:31:12,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10003 states, 10001 states have (on average 1.7605239476052394) internal successors, (17607), 10002 states have internal predecessors, (17607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10003 states to 10003 states and 17607 transitions. [2021-11-22 14:31:13,016 INFO L78 Accepts]: Start accepts. Automaton has 10003 states and 17607 transitions. Word has length 77 [2021-11-22 14:31:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:13,016 INFO L470 AbstractCegarLoop]: Abstraction has 10003 states and 17607 transitions. [2021-11-22 14:31:13,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:13,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10003 states and 17607 transitions. [2021-11-22 14:31:13,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-22 14:31:13,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:13,026 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] [2021-11-22 14:31:13,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 14:31:13,026 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:13,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:13,027 INFO L85 PathProgramCache]: Analyzing trace with hash 163453589, now seen corresponding path program 1 times [2021-11-22 14:31:13,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:13,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774174701] [2021-11-22 14:31:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:13,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:13,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:13,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774174701] [2021-11-22 14:31:13,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774174701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:13,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:13,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:13,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60144072] [2021-11-22 14:31:13,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:13,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:13,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:13,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:13,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:13,075 INFO L87 Difference]: Start difference. First operand 10003 states and 17607 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:14,054 INFO L93 Difference]: Finished difference Result 25023 states and 44129 transitions. [2021-11-22 14:31:14,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:14,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-22 14:31:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:14,101 INFO L225 Difference]: With dead ends: 25023 [2021-11-22 14:31:14,101 INFO L226 Difference]: Without dead ends: 16724 [2021-11-22 14:31:14,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:14,116 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 787 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:14,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 1680 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16724 states. [2021-11-22 14:31:15,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16724 to 16478. [2021-11-22 14:31:15,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16478 states, 16476 states have (on average 1.7615319252245691) internal successors, (29023), 16477 states have internal predecessors, (29023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16478 states to 16478 states and 29023 transitions. [2021-11-22 14:31:15,198 INFO L78 Accepts]: Start accepts. Automaton has 16478 states and 29023 transitions. Word has length 78 [2021-11-22 14:31:15,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:15,198 INFO L470 AbstractCegarLoop]: Abstraction has 16478 states and 29023 transitions. [2021-11-22 14:31:15,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:15,199 INFO L276 IsEmpty]: Start isEmpty. Operand 16478 states and 29023 transitions. [2021-11-22 14:31:15,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-22 14:31:15,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:15,210 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] [2021-11-22 14:31:15,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 14:31:15,210 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:15,211 INFO L85 PathProgramCache]: Analyzing trace with hash -384900719, now seen corresponding path program 1 times [2021-11-22 14:31:15,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:15,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685949037] [2021-11-22 14:31:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:15,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:15,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:15,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685949037] [2021-11-22 14:31:15,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685949037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:15,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:15,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:15,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061560035] [2021-11-22 14:31:15,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:15,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:15,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:15,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:15,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:15,266 INFO L87 Difference]: Start difference. First operand 16478 states and 29023 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:16,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:16,372 INFO L93 Difference]: Finished difference Result 42070 states and 74341 transitions. [2021-11-22 14:31:16,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:16,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-22 14:31:16,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:16,439 INFO L225 Difference]: With dead ends: 42070 [2021-11-22 14:31:16,439 INFO L226 Difference]: Without dead ends: 28186 [2021-11-22 14:31:16,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:16,459 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 785 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:16,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1679 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:16,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28186 states. [2021-11-22 14:31:17,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28186 to 27940. [2021-11-22 14:31:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27940 states, 27938 states have (on average 1.764263726823681) internal successors, (49290), 27939 states have internal predecessors, (49290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:17,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27940 states to 27940 states and 49290 transitions. [2021-11-22 14:31:17,935 INFO L78 Accepts]: Start accepts. Automaton has 27940 states and 49290 transitions. Word has length 79 [2021-11-22 14:31:17,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:17,935 INFO L470 AbstractCegarLoop]: Abstraction has 27940 states and 49290 transitions. [2021-11-22 14:31:17,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:17,936 INFO L276 IsEmpty]: Start isEmpty. Operand 27940 states and 49290 transitions. [2021-11-22 14:31:17,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-22 14:31:17,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:17,948 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] [2021-11-22 14:31:17,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 14:31:17,949 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:17,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:17,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1709382663, now seen corresponding path program 1 times [2021-11-22 14:31:17,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:17,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366683095] [2021-11-22 14:31:17,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:17,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:17,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:17,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366683095] [2021-11-22 14:31:17,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366683095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:17,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:17,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:17,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901712525] [2021-11-22 14:31:17,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:17,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:17,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:17,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:17,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:17,996 INFO L87 Difference]: Start difference. First operand 27940 states and 49290 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:19,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:19,734 INFO L93 Difference]: Finished difference Result 74425 states and 131511 transitions. [2021-11-22 14:31:19,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:19,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-22 14:31:19,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:19,833 INFO L225 Difference]: With dead ends: 74425 [2021-11-22 14:31:19,834 INFO L226 Difference]: Without dead ends: 50041 [2021-11-22 14:31:19,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:19,872 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 783 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:19,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1688 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50041 states. [2021-11-22 14:31:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50041 to 49795. [2021-11-22 14:31:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49795 states, 49793 states have (on average 1.7627779005081035) internal successors, (87774), 49794 states have internal predecessors, (87774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49795 states to 49795 states and 87774 transitions. [2021-11-22 14:31:22,179 INFO L78 Accepts]: Start accepts. Automaton has 49795 states and 87774 transitions. Word has length 80 [2021-11-22 14:31:22,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:22,179 INFO L470 AbstractCegarLoop]: Abstraction has 49795 states and 87774 transitions. [2021-11-22 14:31:22,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:22,179 INFO L276 IsEmpty]: Start isEmpty. Operand 49795 states and 87774 transitions. [2021-11-22 14:31:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-22 14:31:22,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:22,209 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] [2021-11-22 14:31:22,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 14:31:22,210 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:22,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:22,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2052812707, now seen corresponding path program 1 times [2021-11-22 14:31:22,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:22,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906693150] [2021-11-22 14:31:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:22,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:22,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:22,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906693150] [2021-11-22 14:31:22,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906693150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:22,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:22,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:22,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400799606] [2021-11-22 14:31:22,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:22,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:22,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:22,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:22,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:22,264 INFO L87 Difference]: Start difference. First operand 49795 states and 87774 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:25,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:25,639 INFO L93 Difference]: Finished difference Result 127568 states and 224765 transitions. [2021-11-22 14:31:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:25,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-22 14:31:25,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:25,802 INFO L225 Difference]: With dead ends: 127568 [2021-11-22 14:31:25,802 INFO L226 Difference]: Without dead ends: 83667 [2021-11-22 14:31:25,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:25,844 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 781 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:25,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 1632 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:25,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83667 states. [2021-11-22 14:31:29,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83667 to 83421. [2021-11-22 14:31:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83421 states, 83419 states have (on average 1.7562785456550667) internal successors, (146507), 83420 states have internal predecessors, (146507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83421 states to 83421 states and 146507 transitions. [2021-11-22 14:31:29,562 INFO L78 Accepts]: Start accepts. Automaton has 83421 states and 146507 transitions. Word has length 81 [2021-11-22 14:31:29,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:29,562 INFO L470 AbstractCegarLoop]: Abstraction has 83421 states and 146507 transitions. [2021-11-22 14:31:29,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:29,563 INFO L276 IsEmpty]: Start isEmpty. Operand 83421 states and 146507 transitions. [2021-11-22 14:31:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-22 14:31:29,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:29,578 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] [2021-11-22 14:31:29,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 14:31:29,578 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:29,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:29,580 INFO L85 PathProgramCache]: Analyzing trace with hash -949555931, now seen corresponding path program 1 times [2021-11-22 14:31:29,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:29,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187866484] [2021-11-22 14:31:29,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:29,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:29,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:29,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187866484] [2021-11-22 14:31:29,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187866484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:29,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:29,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:29,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560179352] [2021-11-22 14:31:29,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:29,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:29,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:29,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:29,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:29,626 INFO L87 Difference]: Start difference. First operand 83421 states and 146507 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:35,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:35,342 INFO L93 Difference]: Finished difference Result 229960 states and 405032 transitions. [2021-11-22 14:31:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:35,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-22 14:31:35,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:35,650 INFO L225 Difference]: With dead ends: 229960 [2021-11-22 14:31:35,650 INFO L226 Difference]: Without dead ends: 154101 [2021-11-22 14:31:35,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:35,711 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 779 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:35,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 1679 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:35,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154101 states. [2021-11-22 14:31:42,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154101 to 153855. [2021-11-22 14:31:42,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153855 states, 153853 states have (on average 1.7584902471840003) internal successors, (270549), 153854 states have internal predecessors, (270549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153855 states to 153855 states and 270549 transitions. [2021-11-22 14:31:42,663 INFO L78 Accepts]: Start accepts. Automaton has 153855 states and 270549 transitions. Word has length 82 [2021-11-22 14:31:42,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:42,664 INFO L470 AbstractCegarLoop]: Abstraction has 153855 states and 270549 transitions. [2021-11-22 14:31:42,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand 153855 states and 270549 transitions. [2021-11-22 14:31:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-22 14:31:42,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:42,680 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] [2021-11-22 14:31:42,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-22 14:31:42,681 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:42,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash 994970733, now seen corresponding path program 1 times [2021-11-22 14:31:42,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:42,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868378699] [2021-11-22 14:31:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:42,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:42,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:42,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868378699] [2021-11-22 14:31:42,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868378699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:42,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:42,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:42,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452203686] [2021-11-22 14:31:42,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:42,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:42,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:42,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:42,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:42,724 INFO L87 Difference]: Start difference. First operand 153855 states and 270549 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)