./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 87743dcc2c25562bb963887f71637e8ebeccc1d21e21cc059ac68c446a3d9b4f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:16:22,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:16:22,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:16:22,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:16:22,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:16:22,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:16:22,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:16:22,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:16:22,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:16:22,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:16:22,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:16:22,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:16:22,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:16:22,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:16:22,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:16:22,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:16:22,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:16:22,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:16:22,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:16:22,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:16:22,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:16:22,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:16:22,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:16:22,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:16:22,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:16:22,753 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:16:22,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:16:22,755 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:16:22,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:16:22,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:16:22,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:16:22,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:16:22,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:16:22,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:16:22,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:16:22,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:16:22,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:16:22,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:16:22,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:16:22,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:16:22,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:16:22,768 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:16:22,791 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:16:22,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:16:22,792 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:16:22,792 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:16:22,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:16:22,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:16:22,793 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:16:22,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:16:22,794 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:16:22,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:16:22,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:16:22,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:16:22,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:16:22,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:16:22,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:16:22,796 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:16:22,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:16:22,796 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:16:22,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:16:22,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:16:22,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:16:22,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:16:22,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:16:22,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:16:22,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:16:22,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:16:22,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:16:22,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:16:22,799 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:16:22,799 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:16:22,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:16:22,799 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:16:22,800 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_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87743dcc2c25562bb963887f71637e8ebeccc1d21e21cc059ac68c446a3d9b4f [2021-11-02 23:16:23,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:16:23,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:16:23,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:16:23,107 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:16:23,108 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:16:23,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/product-lines/email_spec4_product31.cil.c [2021-11-02 23:16:23,180 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/data/6464777f0/e47a4c4b41804cfba7f48cf227f0fbb5/FLAG87f67c786 [2021-11-02 23:16:23,752 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:16:23,753 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/sv-benchmarks/c/product-lines/email_spec4_product31.cil.c [2021-11-02 23:16:23,774 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/data/6464777f0/e47a4c4b41804cfba7f48cf227f0fbb5/FLAG87f67c786 [2021-11-02 23:16:23,995 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/data/6464777f0/e47a4c4b41804cfba7f48cf227f0fbb5 [2021-11-02 23:16:23,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:16:23,999 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:16:24,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:16:24,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:16:24,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:16:24,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:16:23" (1/1) ... [2021-11-02 23:16:24,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f5aabcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:24, skipping insertion in model container [2021-11-02 23:16:24,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:16:23" (1/1) ... [2021-11-02 23:16:24,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:16:24,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:16:24,475 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/sv-benchmarks/c/product-lines/email_spec4_product31.cil.c[26985,26998] [2021-11-02 23:16:24,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:16:24,823 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:16:24,895 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/sv-benchmarks/c/product-lines/email_spec4_product31.cil.c[26985,26998] [2021-11-02 23:16:24,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:16:24,992 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:16:24,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:24 WrapperNode [2021-11-02 23:16:24,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:16:24,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:16:24,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:16:24,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:16:25,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:24" (1/1) ... [2021-11-02 23:16:25,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:24" (1/1) ... [2021-11-02 23:16:25,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:16:25,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:16:25,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:16:25,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:16:25,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:24" (1/1) ... [2021-11-02 23:16:25,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:24" (1/1) ... [2021-11-02 23:16:25,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:24" (1/1) ... [2021-11-02 23:16:25,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:24" (1/1) ... [2021-11-02 23:16:25,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:24" (1/1) ... [2021-11-02 23:16:25,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:24" (1/1) ... [2021-11-02 23:16:25,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:24" (1/1) ... [2021-11-02 23:16:25,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:16:25,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:16:25,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:16:25,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:16:25,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:24" (1/1) ... [2021-11-02 23:16:25,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:16:25,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:25,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:16:25,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:16:25,420 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-02 23:16:25,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:16:25,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:16:25,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:16:25,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:16:27,672 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:16:27,673 INFO L299 CfgBuilder]: Removed 375 assume(true) statements. [2021-11-02 23:16:27,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:16:27 BoogieIcfgContainer [2021-11-02 23:16:27,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:16:27,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:16:27,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:16:27,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:16:27,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:16:23" (1/3) ... [2021-11-02 23:16:27,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621870e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:16:27, skipping insertion in model container [2021-11-02 23:16:27,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:16:24" (2/3) ... [2021-11-02 23:16:27,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621870e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:16:27, skipping insertion in model container [2021-11-02 23:16:27,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:16:27" (3/3) ... [2021-11-02 23:16:27,688 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product31.cil.c [2021-11-02 23:16:27,697 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:16:27,697 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-02 23:16:27,759 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:16:27,765 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 23:16:27,765 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-02 23:16:27,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 567 states, 564 states have (on average 1.7375886524822695) internal successors, (980), 566 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 23:16:27,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:27,808 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:27,808 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:27,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:27,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1911646779, now seen corresponding path program 1 times [2021-11-02 23:16:27,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:27,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173773521] [2021-11-02 23:16:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:27,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:28,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:28,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173773521] [2021-11-02 23:16:28,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173773521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:28,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:28,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:16:28,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479280534] [2021-11-02 23:16:28,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:16:28,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:28,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:16:28,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:28,326 INFO L87 Difference]: Start difference. First operand has 567 states, 564 states have (on average 1.7375886524822695) internal successors, (980), 566 states have internal predecessors, (980), 0 states have call successors, (0), 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 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:28,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:28,507 INFO L93 Difference]: Finished difference Result 1666 states and 2882 transitions. [2021-11-02 23:16:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:16:28,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-02 23:16:28,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:28,536 INFO L225 Difference]: With dead ends: 1666 [2021-11-02 23:16:28,536 INFO L226 Difference]: Without dead ends: 896 [2021-11-02 23:16:28,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:28,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-11-02 23:16:28,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 457. [2021-11-02 23:16:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 455 states have (on average 1.7384615384615385) internal successors, (791), 456 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:28,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 791 transitions. [2021-11-02 23:16:28,685 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 791 transitions. Word has length 47 [2021-11-02 23:16:28,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:28,686 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 791 transitions. [2021-11-02 23:16:28,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:28,687 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 791 transitions. [2021-11-02 23:16:28,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 23:16:28,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:28,699 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:28,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:16:28,700 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:28,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:28,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1171212398, now seen corresponding path program 1 times [2021-11-02 23:16:28,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:28,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378377797] [2021-11-02 23:16:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:28,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:28,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:28,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378377797] [2021-11-02 23:16:28,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378377797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:28,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:28,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:16:28,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308677922] [2021-11-02 23:16:28,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:16:28,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:28,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:16:28,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:16:28,914 INFO L87 Difference]: Start difference. First operand 457 states and 791 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:29,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:29,105 INFO L93 Difference]: Finished difference Result 1320 states and 2289 transitions. [2021-11-02 23:16:29,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:16:29,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-11-02 23:16:29,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:29,113 INFO L225 Difference]: With dead ends: 1320 [2021-11-02 23:16:29,113 INFO L226 Difference]: Without dead ends: 882 [2021-11-02 23:16:29,115 INFO L786 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 [2021-11-02 23:16:29,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-11-02 23:16:29,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 457. [2021-11-02 23:16:29,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 455 states have (on average 1.7362637362637363) internal successors, (790), 456 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 790 transitions. [2021-11-02 23:16:29,149 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 790 transitions. Word has length 49 [2021-11-02 23:16:29,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:29,149 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 790 transitions. [2021-11-02 23:16:29,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:29,150 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 790 transitions. [2021-11-02 23:16:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 23:16:29,152 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:29,152 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:29,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:16:29,153 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:29,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:29,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1526058011, now seen corresponding path program 1 times [2021-11-02 23:16:29,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:29,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647403965] [2021-11-02 23:16:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:29,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:29,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:29,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647403965] [2021-11-02 23:16:29,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647403965] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:29,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:29,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:16:29,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622569206] [2021-11-02 23:16:29,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:16:29,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:29,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:16:29,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:29,277 INFO L87 Difference]: Start difference. First operand 457 states and 790 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:29,320 INFO L93 Difference]: Finished difference Result 896 states and 1554 transitions. [2021-11-02 23:16:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:16:29,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-02 23:16:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:29,325 INFO L225 Difference]: With dead ends: 896 [2021-11-02 23:16:29,325 INFO L226 Difference]: Without dead ends: 462 [2021-11-02 23:16:29,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:29,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-02 23:16:29,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 457. [2021-11-02 23:16:29,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 455 states have (on average 1.7296703296703297) internal successors, (787), 456 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:29,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 787 transitions. [2021-11-02 23:16:29,348 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 787 transitions. Word has length 50 [2021-11-02 23:16:29,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:29,349 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 787 transitions. [2021-11-02 23:16:29,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:29,349 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 787 transitions. [2021-11-02 23:16:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 23:16:29,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:29,351 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:29,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:16:29,352 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:29,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:29,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1394504170, now seen corresponding path program 1 times [2021-11-02 23:16:29,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:29,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610450443] [2021-11-02 23:16:29,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:29,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:29,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:29,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610450443] [2021-11-02 23:16:29,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610450443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:29,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:29,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:16:29,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246234746] [2021-11-02 23:16:29,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:16:29,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:29,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:16:29,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:16:29,439 INFO L87 Difference]: Start difference. First operand 457 states and 787 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:29,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:29,595 INFO L93 Difference]: Finished difference Result 1310 states and 2269 transitions. [2021-11-02 23:16:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:16:29,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-02 23:16:29,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:29,602 INFO L225 Difference]: With dead ends: 1310 [2021-11-02 23:16:29,602 INFO L226 Difference]: Without dead ends: 880 [2021-11-02 23:16:29,604 INFO L786 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 [2021-11-02 23:16:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-11-02 23:16:29,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 457. [2021-11-02 23:16:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 455 states have (on average 1.7274725274725276) internal successors, (786), 456 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 786 transitions. [2021-11-02 23:16:29,632 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 786 transitions. Word has length 52 [2021-11-02 23:16:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:29,633 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 786 transitions. [2021-11-02 23:16:29,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 786 transitions. [2021-11-02 23:16:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:16:29,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:29,635 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:29,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:16:29,636 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:29,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:29,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1333540953, now seen corresponding path program 1 times [2021-11-02 23:16:29,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:29,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12232400] [2021-11-02 23:16:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:29,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:29,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:29,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12232400] [2021-11-02 23:16:29,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12232400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:29,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:29,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:16:29,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508313736] [2021-11-02 23:16:29,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:16:29,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:29,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:16:29,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:16:29,708 INFO L87 Difference]: Start difference. First operand 457 states and 786 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:29,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:29,893 INFO L93 Difference]: Finished difference Result 1315 states and 2273 transitions. [2021-11-02 23:16:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:16:29,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-02 23:16:29,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:29,900 INFO L225 Difference]: With dead ends: 1315 [2021-11-02 23:16:29,900 INFO L226 Difference]: Without dead ends: 885 [2021-11-02 23:16:29,901 INFO L786 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 [2021-11-02 23:16:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-11-02 23:16:29,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 457. [2021-11-02 23:16:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 455 states have (on average 1.7252747252747254) internal successors, (785), 456 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:29,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 785 transitions. [2021-11-02 23:16:29,937 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 785 transitions. Word has length 53 [2021-11-02 23:16:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:29,938 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 785 transitions. [2021-11-02 23:16:29,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 785 transitions. [2021-11-02 23:16:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 23:16:29,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:29,940 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:29,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:16:29,941 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:29,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1962923407, now seen corresponding path program 1 times [2021-11-02 23:16:29,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:29,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973224500] [2021-11-02 23:16:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:29,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:30,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:30,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973224500] [2021-11-02 23:16:30,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973224500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:30,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:30,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:16:30,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795707345] [2021-11-02 23:16:30,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:16:30,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:30,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:16:30,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:30,004 INFO L87 Difference]: Start difference. First operand 457 states and 785 transitions. 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) [2021-11-02 23:16:30,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:30,039 INFO L93 Difference]: Finished difference Result 676 states and 1146 transitions. [2021-11-02 23:16:30,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:16:30,040 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 [2021-11-02 23:16:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:30,044 INFO L225 Difference]: With dead ends: 676 [2021-11-02 23:16:30,044 INFO L226 Difference]: Without dead ends: 460 [2021-11-02 23:16:30,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:30,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-02 23:16:30,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 459. [2021-11-02 23:16:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 457 states have (on average 1.7221006564551422) internal successors, (787), 458 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 787 transitions. [2021-11-02 23:16:30,074 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 787 transitions. Word has length 54 [2021-11-02 23:16:30,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:30,075 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 787 transitions. [2021-11-02 23:16:30,075 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) [2021-11-02 23:16:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 787 transitions. [2021-11-02 23:16:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 23:16:30,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:30,077 INFO L513 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] [2021-11-02 23:16:30,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 23:16:30,078 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:30,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:30,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1666053423, now seen corresponding path program 1 times [2021-11-02 23:16:30,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:30,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537262691] [2021-11-02 23:16:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:30,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:30,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:30,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537262691] [2021-11-02 23:16:30,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537262691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:30,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:30,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:16:30,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898292766] [2021-11-02 23:16:30,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:16:30,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:30,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:16:30,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:30,139 INFO L87 Difference]: Start difference. First operand 459 states and 787 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:30,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:30,199 INFO L93 Difference]: Finished difference Result 1263 states and 2185 transitions. [2021-11-02 23:16:30,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:16:30,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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 [2021-11-02 23:16:30,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:30,206 INFO L225 Difference]: With dead ends: 1263 [2021-11-02 23:16:30,206 INFO L226 Difference]: Without dead ends: 835 [2021-11-02 23:16:30,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:30,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-11-02 23:16:30,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 619. [2021-11-02 23:16:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 617 states have (on average 1.7504051863857375) internal successors, (1080), 618 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:30,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1080 transitions. [2021-11-02 23:16:30,252 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1080 transitions. Word has length 60 [2021-11-02 23:16:30,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:30,252 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1080 transitions. [2021-11-02 23:16:30,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1080 transitions. [2021-11-02 23:16:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 23:16:30,254 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:30,255 INFO L513 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] [2021-11-02 23:16:30,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 23:16:30,255 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:30,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:30,256 INFO L85 PathProgramCache]: Analyzing trace with hash -845442222, now seen corresponding path program 1 times [2021-11-02 23:16:30,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:30,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929216401] [2021-11-02 23:16:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:30,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:30,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:30,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929216401] [2021-11-02 23:16:30,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929216401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:30,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178196636] [2021-11-02 23:16:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:30,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:30,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:30,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:30,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:16:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:30,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:16:30,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:30,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178196636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:30,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:30,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 23:16:30,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820459636] [2021-11-02 23:16:30,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:16:30,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:30,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:16:30,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:16:30,872 INFO L87 Difference]: Start difference. First operand 619 states and 1080 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:30,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:30,981 INFO L93 Difference]: Finished difference Result 1267 states and 2188 transitions. [2021-11-02 23:16:30,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:16:30,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-02 23:16:30,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:30,989 INFO L225 Difference]: With dead ends: 1267 [2021-11-02 23:16:30,989 INFO L226 Difference]: Without dead ends: 1051 [2021-11-02 23:16:30,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:16:30,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-11-02 23:16:31,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 833. [2021-11-02 23:16:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 831 states have (on average 1.7689530685920578) internal successors, (1470), 832 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:31,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1470 transitions. [2021-11-02 23:16:31,048 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1470 transitions. Word has length 61 [2021-11-02 23:16:31,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:31,049 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1470 transitions. [2021-11-02 23:16:31,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:31,049 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1470 transitions. [2021-11-02 23:16:31,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 23:16:31,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:31,051 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:31,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:31,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d4c326-8cf1-411a-844f-34e89eb83d7e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:31,266 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:31,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:31,267 INFO L85 PathProgramCache]: Analyzing trace with hash 675972831, now seen corresponding path program 1 times [2021-11-02 23:16:31,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:31,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664679802] [2021-11-02 23:16:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:31,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:31,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:31,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664679802] [2021-11-02 23:16:31,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664679802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:31,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:31,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:16:31,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615304198] [2021-11-02 23:16:31,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:16:31,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:31,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:16:31,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:31,333 INFO L87 Difference]: Start difference. First operand 833 states and 1470 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:31,454 INFO L93 Difference]: Finished difference Result 2165 states and 3834 transitions. [2021-11-02 23:16:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:16:31,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 23:16:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:31,465 INFO L225 Difference]: With dead ends: 2165 [2021-11-02 23:16:31,465 INFO L226 Difference]: Without dead ends: 1421 [2021-11-02 23:16:31,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:31,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-11-02 23:16:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1205. [2021-11-02 23:16:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1203 states have (on average 1.7855361596009975) internal successors, (2148), 1204 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 2148 transitions. [2021-11-02 23:16:31,560 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 2148 transitions. Word has length 67 [2021-11-02 23:16:31,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:31,560 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 2148 transitions. [2021-11-02 23:16:31,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:31,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 2148 transitions. [2021-11-02 23:16:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 23:16:31,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:31,564 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:31,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 23:16:31,565 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:31,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:31,566 INFO L85 PathProgramCache]: Analyzing trace with hash -12164049, now seen corresponding path program 2 times [2021-11-02 23:16:31,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:31,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593842319] [2021-11-02 23:16:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:31,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:31,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:31,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593842319] [2021-11-02 23:16:31,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593842319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:31,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:31,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:16:31,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887704924] [2021-11-02 23:16:31,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:16:31,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:31,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:16:31,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:31,638 INFO L87 Difference]: Start difference. First operand 1205 states and 2148 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:31,728 INFO L93 Difference]: Finished difference Result 2379 states and 4222 transitions. [2021-11-02 23:16:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:16:31,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-02 23:16:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:31,738 INFO L225 Difference]: With dead ends: 2379 [2021-11-02 23:16:31,738 INFO L226 Difference]: Without dead ends: 1421 [2021-11-02 23:16:31,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-11-02 23:16:31,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1205. [2021-11-02 23:16:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1203 states have (on average 1.7838736492103076) internal successors, (2146), 1204 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 2146 transitions. [2021-11-02 23:16:31,819 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 2146 transitions. Word has length 68 [2021-11-02 23:16:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:31,820 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 2146 transitions. [2021-11-02 23:16:31,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 2146 transitions. [2021-11-02 23:16:31,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 23:16:31,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:31,823 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:31,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 23:16:31,824 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:31,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2019565520, now seen corresponding path program 1 times [2021-11-02 23:16:31,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:31,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349962752] [2021-11-02 23:16:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:31,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:31,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:31,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349962752] [2021-11-02 23:16:31,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349962752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:31,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:31,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:16:31,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828620597] [2021-11-02 23:16:31,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:16:31,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:31,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:16:31,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:31,885 INFO L87 Difference]: Start difference. First operand 1205 states and 2146 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:32,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:32,037 INFO L93 Difference]: Finished difference Result 3253 states and 5817 transitions. [2021-11-02 23:16:32,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:16:32,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-02 23:16:32,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:32,051 INFO L225 Difference]: With dead ends: 3253 [2021-11-02 23:16:32,051 INFO L226 Difference]: Without dead ends: 2145 [2021-11-02 23:16:32,054 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-11-02 23:16:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1929. [2021-11-02 23:16:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1927 states have (on average 1.798131811105345) internal successors, (3465), 1928 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 3465 transitions. [2021-11-02 23:16:32,171 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 3465 transitions. Word has length 68 [2021-11-02 23:16:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:32,172 INFO L470 AbstractCegarLoop]: Abstraction has 1929 states and 3465 transitions. [2021-11-02 23:16:32,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:32,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 3465 transitions. [2021-11-02 23:16:32,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 23:16:32,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:32,177 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:32,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 23:16:32,177 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:32,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:32,178 INFO L85 PathProgramCache]: Analyzing trace with hash -918013731, now seen corresponding path program 1 times [2021-11-02 23:16:32,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:32,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420206064] [2021-11-02 23:16:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:32,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:32,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:32,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420206064] [2021-11-02 23:16:32,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420206064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:32,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:32,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:16:32,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791920767] [2021-11-02 23:16:32,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:16:32,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:32,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:16:32,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:32,236 INFO L87 Difference]: Start difference. First operand 1929 states and 3465 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:32,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:32,412 INFO L93 Difference]: Finished difference Result 5161 states and 9293 transitions. [2021-11-02 23:16:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:16:32,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-02 23:16:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:32,438 INFO L225 Difference]: With dead ends: 5161 [2021-11-02 23:16:32,438 INFO L226 Difference]: Without dead ends: 3363 [2021-11-02 23:16:32,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:32,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2021-11-02 23:16:32,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3147. [2021-11-02 23:16:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3147 states, 3145 states have (on average 1.8054054054054054) internal successors, (5678), 3146 states have internal predecessors, (5678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:32,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3147 states to 3147 states and 5678 transitions. [2021-11-02 23:16:32,664 INFO L78 Accepts]: Start accepts. Automaton has 3147 states and 5678 transitions. Word has length 69 [2021-11-02 23:16:32,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:32,664 INFO L470 AbstractCegarLoop]: Abstraction has 3147 states and 5678 transitions. [2021-11-02 23:16:32,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:32,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3147 states and 5678 transitions. [2021-11-02 23:16:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 23:16:32,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:32,670 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:32,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 23:16:32,670 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:32,670 INFO L85 PathProgramCache]: Analyzing trace with hash 758815231, now seen corresponding path program 1 times [2021-11-02 23:16:32,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:32,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227548318] [2021-11-02 23:16:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:32,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:32,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:32,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227548318] [2021-11-02 23:16:32,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227548318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:32,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:32,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:16:32,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416652636] [2021-11-02 23:16:32,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:16:32,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:32,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:16:32,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:32,730 INFO L87 Difference]: Start difference. First operand 3147 states and 5678 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) [2021-11-02 23:16:32,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:32,981 INFO L93 Difference]: Finished difference Result 8531 states and 15415 transitions. [2021-11-02 23:16:32,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:16:32,982 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 [2021-11-02 23:16:32,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:33,077 INFO L225 Difference]: With dead ends: 8531 [2021-11-02 23:16:33,077 INFO L226 Difference]: Without dead ends: 5549 [2021-11-02 23:16:33,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:33,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5549 states. [2021-11-02 23:16:33,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5549 to 5333. [2021-11-02 23:16:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5333 states, 5331 states have (on average 1.8081035453010692) internal successors, (9639), 5332 states have internal predecessors, (9639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:33,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5333 states to 5333 states and 9639 transitions. [2021-11-02 23:16:33,392 INFO L78 Accepts]: Start accepts. Automaton has 5333 states and 9639 transitions. Word has length 70 [2021-11-02 23:16:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:33,393 INFO L470 AbstractCegarLoop]: Abstraction has 5333 states and 9639 transitions. [2021-11-02 23:16:33,393 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) [2021-11-02 23:16:33,393 INFO L276 IsEmpty]: Start isEmpty. Operand 5333 states and 9639 transitions. [2021-11-02 23:16:33,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 23:16:33,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:33,399 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:33,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 23:16:33,400 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:33,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:33,400 INFO L85 PathProgramCache]: Analyzing trace with hash 373577307, now seen corresponding path program 1 times [2021-11-02 23:16:33,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:33,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308106479] [2021-11-02 23:16:33,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:33,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:16:33,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:33,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308106479] [2021-11-02 23:16:33,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308106479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:33,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:33,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:16:33,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662209862] [2021-11-02 23:16:33,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:16:33,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:33,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:16:33,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:16:33,475 INFO L87 Difference]: Start difference. First operand 5333 states and 9639 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:34,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:34,337 INFO L93 Difference]: Finished difference Result 15218 states and 27534 transitions. [2021-11-02 23:16:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:16:34,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-02 23:16:34,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:34,393 INFO L225 Difference]: With dead ends: 15218 [2021-11-02 23:16:34,393 INFO L226 Difference]: Without dead ends: 10132 [2021-11-02 23:16:34,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:16:34,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10132 states. [2021-11-02 23:16:34,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10132 to 5333. [2021-11-02 23:16:34,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5333 states, 5331 states have (on average 1.7987244419433501) internal successors, (9589), 5332 states have internal predecessors, (9589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5333 states to 5333 states and 9589 transitions. [2021-11-02 23:16:34,842 INFO L78 Accepts]: Start accepts. Automaton has 5333 states and 9589 transitions. Word has length 71 [2021-11-02 23:16:34,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:34,843 INFO L470 AbstractCegarLoop]: Abstraction has 5333 states and 9589 transitions. [2021-11-02 23:16:34,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 5333 states and 9589 transitions. [2021-11-02 23:16:34,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 23:16:34,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:34,850 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:34,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 23:16:34,850 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:34,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:34,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1183884, now seen corresponding path program 1 times [2021-11-02 23:16:34,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:34,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145485911] [2021-11-02 23:16:34,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:34,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:16:34,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:34,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145485911] [2021-11-02 23:16:34,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145485911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:34,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:34,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:16:34,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246477306] [2021-11-02 23:16:34,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:16:34,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:34,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:16:34,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:34,915 INFO L87 Difference]: Start difference. First operand 5333 states and 9589 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:35,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:35,344 INFO L93 Difference]: Finished difference Result 15415 states and 27762 transitions. [2021-11-02 23:16:35,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:16:35,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-02 23:16:35,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:35,372 INFO L225 Difference]: With dead ends: 15415 [2021-11-02 23:16:35,373 INFO L226 Difference]: Without dead ends: 10255 [2021-11-02 23:16:35,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:35,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10255 states. [2021-11-02 23:16:35,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10255 to 10039. [2021-11-02 23:16:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10039 states, 10037 states have (on average 1.8003387466374414) internal successors, (18070), 10038 states have internal predecessors, (18070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10039 states to 10039 states and 18070 transitions. [2021-11-02 23:16:35,966 INFO L78 Accepts]: Start accepts. Automaton has 10039 states and 18070 transitions. Word has length 71 [2021-11-02 23:16:35,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:35,966 INFO L470 AbstractCegarLoop]: Abstraction has 10039 states and 18070 transitions. [2021-11-02 23:16:35,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:35,966 INFO L276 IsEmpty]: Start isEmpty. Operand 10039 states and 18070 transitions. [2021-11-02 23:16:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 23:16:35,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:35,974 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:35,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 23:16:35,974 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:35,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1885115392, now seen corresponding path program 1 times [2021-11-02 23:16:35,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:35,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225731815] [2021-11-02 23:16:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:35,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:16:36,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:36,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225731815] [2021-11-02 23:16:36,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225731815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:36,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:36,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 23:16:36,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974808261] [2021-11-02 23:16:36,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:16:36,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:36,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:16:36,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:16:36,077 INFO L87 Difference]: Start difference. First operand 10039 states and 18070 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:37,298 INFO L93 Difference]: Finished difference Result 20696 states and 37142 transitions. [2021-11-02 23:16:37,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:16:37,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-02 23:16:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:37,358 INFO L225 Difference]: With dead ends: 20696 [2021-11-02 23:16:37,358 INFO L226 Difference]: Without dead ends: 20498 [2021-11-02 23:16:37,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:16:37,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20498 states. [2021-11-02 23:16:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20498 to 20020. [2021-11-02 23:16:38,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20020 states, 20018 states have (on average 1.8006294335098412) internal successors, (36045), 20019 states have internal predecessors, (36045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:38,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20020 states to 20020 states and 36045 transitions. [2021-11-02 23:16:38,409 INFO L78 Accepts]: Start accepts. Automaton has 20020 states and 36045 transitions. Word has length 72 [2021-11-02 23:16:38,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:38,409 INFO L470 AbstractCegarLoop]: Abstraction has 20020 states and 36045 transitions. [2021-11-02 23:16:38,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:38,410 INFO L276 IsEmpty]: Start isEmpty. Operand 20020 states and 36045 transitions. [2021-11-02 23:16:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-02 23:16:38,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:38,427 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:38,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 23:16:38,428 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:38,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1939879959, now seen corresponding path program 1 times [2021-11-02 23:16:38,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:38,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816779480] [2021-11-02 23:16:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:38,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:16:38,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:38,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816779480] [2021-11-02 23:16:38,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816779480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:38,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:38,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:16:38,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771958480] [2021-11-02 23:16:38,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:16:38,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:38,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:16:38,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:16:38,523 INFO L87 Difference]: Start difference. First operand 20020 states and 36045 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:39,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:39,594 INFO L93 Difference]: Finished difference Result 20643 states and 37064 transitions. [2021-11-02 23:16:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:16:39,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-02 23:16:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:39,649 INFO L225 Difference]: With dead ends: 20643 [2021-11-02 23:16:39,650 INFO L226 Difference]: Without dead ends: 20277 [2021-11-02 23:16:39,658 INFO L786 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 [2021-11-02 23:16:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20277 states. [2021-11-02 23:16:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20277 to 20014. [2021-11-02 23:16:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20014 states, 20012 states have (on average 1.8005196881870877) internal successors, (36032), 20013 states have internal predecessors, (36032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20014 states to 20014 states and 36032 transitions. [2021-11-02 23:16:40,701 INFO L78 Accepts]: Start accepts. Automaton has 20014 states and 36032 transitions. Word has length 73 [2021-11-02 23:16:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:40,702 INFO L470 AbstractCegarLoop]: Abstraction has 20014 states and 36032 transitions. [2021-11-02 23:16:40,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:40,702 INFO L276 IsEmpty]: Start isEmpty. Operand 20014 states and 36032 transitions. [2021-11-02 23:16:40,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-02 23:16:40,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:40,721 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:40,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 23:16:40,722 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:40,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:40,723 INFO L85 PathProgramCache]: Analyzing trace with hash -526628051, now seen corresponding path program 1 times [2021-11-02 23:16:40,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:40,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762742843] [2021-11-02 23:16:40,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:40,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:16:40,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:40,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762742843] [2021-11-02 23:16:40,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762742843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:40,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:40,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:16:40,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583436974] [2021-11-02 23:16:40,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:16:40,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:40,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:16:40,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:16:40,787 INFO L87 Difference]: Start difference. First operand 20014 states and 36032 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:42,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:42,264 INFO L93 Difference]: Finished difference Result 39005 states and 70339 transitions. [2021-11-02 23:16:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:16:42,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-02 23:16:42,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:42,341 INFO L225 Difference]: With dead ends: 39005 [2021-11-02 23:16:42,341 INFO L226 Difference]: Without dead ends: 28978 [2021-11-02 23:16:42,358 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:16:42,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28978 states. [2021-11-02 23:16:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28978 to 19772. [2021-11-02 23:16:43,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19772 states, 19770 states have (on average 1.8014668689934243) internal successors, (35615), 19771 states have internal predecessors, (35615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19772 states to 19772 states and 35615 transitions. [2021-11-02 23:16:43,304 INFO L78 Accepts]: Start accepts. Automaton has 19772 states and 35615 transitions. Word has length 73 [2021-11-02 23:16:43,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:43,305 INFO L470 AbstractCegarLoop]: Abstraction has 19772 states and 35615 transitions. [2021-11-02 23:16:43,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:43,305 INFO L276 IsEmpty]: Start isEmpty. Operand 19772 states and 35615 transitions. [2021-11-02 23:16:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 23:16:43,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:43,316 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:43,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 23:16:43,316 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:43,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:43,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1967306583, now seen corresponding path program 1 times [2021-11-02 23:16:43,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:43,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662553714] [2021-11-02 23:16:43,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:43,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:16:43,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:43,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662553714] [2021-11-02 23:16:43,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662553714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:43,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:43,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 23:16:43,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709890236] [2021-11-02 23:16:43,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:16:43,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:43,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:16:43,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:16:43,406 INFO L87 Difference]: Start difference. First operand 19772 states and 35615 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:44,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:44,956 INFO L93 Difference]: Finished difference Result 20260 states and 36413 transitions. [2021-11-02 23:16:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:16:44,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-02 23:16:44,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:45,008 INFO L225 Difference]: With dead ends: 20260 [2021-11-02 23:16:45,009 INFO L226 Difference]: Without dead ends: 20254 [2021-11-02 23:16:45,015 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:16:45,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20254 states. [2021-11-02 23:16:45,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20254 to 19816. [2021-11-02 23:16:45,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19816 states, 19814 states have (on average 1.8012011708892701) internal successors, (35689), 19815 states have internal predecessors, (35689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19816 states to 19816 states and 35689 transitions. [2021-11-02 23:16:45,960 INFO L78 Accepts]: Start accepts. Automaton has 19816 states and 35689 transitions. Word has length 75 [2021-11-02 23:16:45,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:45,961 INFO L470 AbstractCegarLoop]: Abstraction has 19816 states and 35689 transitions. [2021-11-02 23:16:45,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:45,961 INFO L276 IsEmpty]: Start isEmpty. Operand 19816 states and 35689 transitions. [2021-11-02 23:16:45,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 23:16:45,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:45,972 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:45,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 23:16:45,973 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:45,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:45,974 INFO L85 PathProgramCache]: Analyzing trace with hash -855384539, now seen corresponding path program 1 times [2021-11-02 23:16:45,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:45,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222439567] [2021-11-02 23:16:45,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:45,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:16:46,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:46,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222439567] [2021-11-02 23:16:46,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222439567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:46,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:46,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 23:16:46,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260906133] [2021-11-02 23:16:46,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:16:46,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:46,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:16:46,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:16:46,111 INFO L87 Difference]: Start difference. First operand 19816 states and 35689 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:47,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:47,274 INFO L93 Difference]: Finished difference Result 20420 states and 36677 transitions. [2021-11-02 23:16:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:16:47,275 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 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 76 [2021-11-02 23:16:47,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:47,319 INFO L225 Difference]: With dead ends: 20420 [2021-11-02 23:16:47,319 INFO L226 Difference]: Without dead ends: 20096 [2021-11-02 23:16:47,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:16:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20096 states. [2021-11-02 23:16:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20096 to 19810. [2021-11-02 23:16:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19810 states, 19808 states have (on average 1.8010904684975768) internal successors, (35676), 19809 states have internal predecessors, (35676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:48,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19810 states to 19810 states and 35676 transitions. [2021-11-02 23:16:48,075 INFO L78 Accepts]: Start accepts. Automaton has 19810 states and 35676 transitions. Word has length 76 [2021-11-02 23:16:48,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:48,076 INFO L470 AbstractCegarLoop]: Abstraction has 19810 states and 35676 transitions. [2021-11-02 23:16:48,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:48,076 INFO L276 IsEmpty]: Start isEmpty. Operand 19810 states and 35676 transitions. [2021-11-02 23:16:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-02 23:16:48,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:48,089 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:48,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 23:16:48,090 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:48,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:48,090 INFO L85 PathProgramCache]: Analyzing trace with hash 517745881, now seen corresponding path program 1 times [2021-11-02 23:16:48,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:48,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882071571] [2021-11-02 23:16:48,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:48,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:16:48,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:48,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882071571] [2021-11-02 23:16:48,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882071571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:48,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:48,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:16:48,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74481879] [2021-11-02 23:16:48,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:16:48,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:16:48,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:48,146 INFO L87 Difference]: Start difference. First operand 19810 states and 35676 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) [2021-11-02 23:16:49,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:49,437 INFO L93 Difference]: Finished difference Result 58357 states and 105282 transitions. [2021-11-02 23:16:49,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:16:49,438 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 82 [2021-11-02 23:16:49,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:49,530 INFO L225 Difference]: With dead ends: 58357 [2021-11-02 23:16:49,531 INFO L226 Difference]: Without dead ends: 38726 [2021-11-02 23:16:49,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38726 states. [2021-11-02 23:16:51,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38726 to 38308. [2021-11-02 23:16:51,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38308 states, 38306 states have (on average 1.8035033676186498) internal successors, (69085), 38307 states have internal predecessors, (69085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38308 states to 38308 states and 69085 transitions. [2021-11-02 23:16:51,182 INFO L78 Accepts]: Start accepts. Automaton has 38308 states and 69085 transitions. Word has length 82 [2021-11-02 23:16:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:51,182 INFO L470 AbstractCegarLoop]: Abstraction has 38308 states and 69085 transitions. [2021-11-02 23:16:51,182 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) [2021-11-02 23:16:51,182 INFO L276 IsEmpty]: Start isEmpty. Operand 38308 states and 69085 transitions. [2021-11-02 23:16:51,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-02 23:16:51,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:51,202 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:51,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 23:16:51,202 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:51,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:51,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1600839378, now seen corresponding path program 1 times [2021-11-02 23:16:51,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:51,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348353268] [2021-11-02 23:16:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:51,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:16:51,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:51,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348353268] [2021-11-02 23:16:51,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348353268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:51,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:51,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:16:51,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890772366] [2021-11-02 23:16:51,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:16:51,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:51,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:16:51,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:51,260 INFO L87 Difference]: Start difference. First operand 38308 states and 69085 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) [2021-11-02 23:16:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:53,810 INFO L93 Difference]: Finished difference Result 114229 states and 206015 transitions. [2021-11-02 23:16:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:16:53,813 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 83 [2021-11-02 23:16:53,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:54,005 INFO L225 Difference]: With dead ends: 114229 [2021-11-02 23:16:54,006 INFO L226 Difference]: Without dead ends: 76104 [2021-11-02 23:16:54,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:54,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76104 states. [2021-11-02 23:16:57,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76104 to 75686. [2021-11-02 23:16:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75686 states, 75684 states have (on average 1.8007240632101897) internal successors, (136286), 75685 states have internal predecessors, (136286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:57,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75686 states to 75686 states and 136286 transitions. [2021-11-02 23:16:57,213 INFO L78 Accepts]: Start accepts. Automaton has 75686 states and 136286 transitions. Word has length 83 [2021-11-02 23:16:57,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:57,213 INFO L470 AbstractCegarLoop]: Abstraction has 75686 states and 136286 transitions. [2021-11-02 23:16:57,213 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) [2021-11-02 23:16:57,213 INFO L276 IsEmpty]: Start isEmpty. Operand 75686 states and 136286 transitions. [2021-11-02 23:16:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 23:16:57,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:57,229 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:57,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 23:16:57,230 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:57,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:57,230 INFO L85 PathProgramCache]: Analyzing trace with hash 668792903, now seen corresponding path program 1 times [2021-11-02 23:16:57,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:57,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685782775] [2021-11-02 23:16:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:57,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:16:57,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:57,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685782775] [2021-11-02 23:16:57,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685782775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:16:57,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:16:57,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:16:57,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888737202] [2021-11-02 23:16:57,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:16:57,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:57,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:16:57,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:16:57,287 INFO L87 Difference]: Start difference. First operand 75686 states and 136286 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) [2021-11-02 23:17:02,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:02,173 INFO L93 Difference]: Finished difference Result 210711 states and 378885 transitions. [2021-11-02 23:17:02,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:17:02,173 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 84 [2021-11-02 23:17:02,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:02,448 INFO L225 Difference]: With dead ends: 210711 [2021-11-02 23:17:02,448 INFO L226 Difference]: Without dead ends: 135242 [2021-11-02 23:17:02,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:17:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135242 states. [2021-11-02 23:17:07,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135242 to 134824. [2021-11-02 23:17:07,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134824 states, 134822 states have (on average 1.7931717375502514) internal successors, (241759), 134823 states have internal predecessors, (241759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:08,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134824 states to 134824 states and 241759 transitions. [2021-11-02 23:17:08,254 INFO L78 Accepts]: Start accepts. Automaton has 134824 states and 241759 transitions. Word has length 84 [2021-11-02 23:17:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:08,255 INFO L470 AbstractCegarLoop]: Abstraction has 134824 states and 241759 transitions. [2021-11-02 23:17:08,255 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) [2021-11-02 23:17:08,255 INFO L276 IsEmpty]: Start isEmpty. Operand 134824 states and 241759 transitions. [2021-11-02 23:17:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-02 23:17:08,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:08,271 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:08,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 23:17:08,271 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:08,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:08,272 INFO L85 PathProgramCache]: Analyzing trace with hash 536800172, now seen corresponding path program 1 times [2021-11-02 23:17:08,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:08,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957312884] [2021-11-02 23:17:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:08,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:17:08,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:08,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957312884] [2021-11-02 23:17:08,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957312884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:17:08,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:17:08,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 23:17:08,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141904909] [2021-11-02 23:17:08,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:17:08,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:08,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:17:08,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:17:08,358 INFO L87 Difference]: Start difference. First operand 134824 states and 241759 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 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)